Initial revision

From-SVN: r102074

libjava/classpath/gnu/xml/xpath/AndExpr.java

@@ -0,0 +1,87 @@
+/* AndExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Logical and.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class AndExpr
+  extends Expr
+{
+
+  final Expr lhs;
+  final Expr rhs;
+
+  public AndExpr(Expr lhs, Expr rhs)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    if (!_boolean(context, left))
+      {
+        return Boolean.FALSE;
+      }
+    Object right = rhs.evaluate(context, pos, len);
+    return _boolean(context, right) ? Boolean.TRUE : Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new AndExpr(lhs.clone(context), rhs.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (lhs.references(var) || rhs.references(var));
+  }
+
+  public String toString()
+  {
+    return lhs + " and " + rhs;
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/ArithmeticExpr.java

@@ -0,0 +1,154 @@
+/* ArithmeticExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Binary arithmetic expression.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class ArithmeticExpr
+  extends Expr
+{
+
+  static final int ADD = 0;
+  static final int SUBTRACT = 1;
+  static final int MULTIPLY = 2;
+  static final int DIVIDE = 3;
+  static final int MODULO = 4;
+
+  final Expr lhs;
+  final Expr rhs;
+  final int op;
+
+  ArithmeticExpr(Expr lhs, Expr rhs, int op)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+    switch (op)
+      {
+      case ADD:
+      case SUBTRACT:
+      case MULTIPLY:
+      case DIVIDE:
+      case MODULO:
+				this.op = op;
+				break;
+      default:
+        throw new IllegalArgumentException();
+      }
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    Object right = rhs.evaluate(context, pos, len);
+
+    double ln = _number(context, left);
+    double rn = _number(context, right);
+    switch (op)
+      {
+      case ADD:
+        return new Double(ln + rn);
+      case SUBTRACT:
+        return new Double(ln - rn);
+      case MULTIPLY:
+        return new Double(ln * rn);
+      case DIVIDE:
+        if (rn == 0.0d || rn == -0.0d)
+          {
+            return new Double(ln < 0.0d ?
+                              Double.NEGATIVE_INFINITY :
+                              Double.POSITIVE_INFINITY);
+          }
+        return new Double(ln / rn);
+      case MODULO:
+        if (rn == 0.0d || rn == -0.0d)
+          {
+            return new Double(ln < 0.0d ?
+                              Double.NEGATIVE_INFINITY :
+                              Double.POSITIVE_INFINITY);
+          }
+        return new Double(ln % rn);
+      default:
+        throw new IllegalStateException();
+      }
+  }
+
+  public Expr clone(Object context)
+  {
+    return new ArithmeticExpr(lhs.clone(context), rhs.clone(context), op);
+  }
+
+  public boolean references(QName var)
+  {
+    return (lhs.references(var) || rhs.references(var));
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer();
+    buf.append(lhs);
+    buf.append(' ');
+    switch (op)
+      {
+      case ADD:
+        buf.append('+');
+        break;
+      case SUBTRACT:
+        buf.append('-');
+        break;
+      case MULTIPLY:
+        buf.append('*');
+        break;
+      case DIVIDE:
+        buf.append("div");
+        break;
+      case MODULO:
+        buf.append("mod");
+        break;
+      }
+    buf.append(' ');
+    buf.append(rhs);
+    return buf.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/BooleanFunction.java

@@ -0,0 +1,95 @@
+/* BooleanFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>boolean</code> function converts its argument to a boolean as
+ * follows:
+ * <ul>
+ * <li>a number is true if and only if it is neither positive or negative
+ * zero nor NaN</li>
+ * <li>a node-set is true if and only if it is non-empty</li>
+ * <li>a string is true if and only if its length is non-zero</li>
+ * <li>an object of a type other than the four basic types is converted to a
+ * boolean in a way that is dependent on that type</li>
+ * </ul>
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class BooleanFunction
+  extends Expr
+{
+
+  final Expr arg;
+  
+  BooleanFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  BooleanFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+  
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    return _boolean(context, val) ? Boolean.TRUE : Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new BooleanFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+  
+  public String toString()
+  {
+    return "boolean(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/CeilingFunction.java

@@ -0,0 +1,89 @@
+/* CeilingFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>ceiling</code> function returns the smallest (closest to
+ * negative infinity) number that is not less than the argument and that
+ * is an integer.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class CeilingFunction
+  extends Expr
+{
+
+  final Expr arg;
+  
+  CeilingFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+  
+  CeilingFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+  
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    double n = _number(context, val);
+    return new Double(Math.ceil(n));
+  }
+
+  public Expr clone(Object context)
+  {
+    return new CeilingFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+  
+  public String toString()
+  {
+    return "ceiling(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/ConcatFunction.java

@@ -0,0 +1,113 @@
+/* ConcatFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>concat</code> function returns the concatenation of its arguments.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class ConcatFunction
+  extends Expr
+{
+
+  final List args;
+
+  ConcatFunction(List args)
+  {
+    this.args = args;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    StringBuffer buf = new StringBuffer();
+    for (Iterator i = args.iterator(); i.hasNext(); )
+      {
+        Expr arg = (Expr) i.next();
+        Object val = arg.evaluate(context, pos, len);
+        buf.append(_string(context, val));
+      }
+    return buf.toString();
+  }
+
+  public Expr clone(Object context)
+  {
+    int len = args.size();
+    List args2 = new ArrayList(len);
+    for (int i = 0; i < len; i++)
+      {
+        args2.add(((Expr) args.get(i)).clone(context));
+      }
+    return new ConcatFunction(args2);
+  }
+
+  public boolean references(QName var)
+  {
+    for (Iterator i = args.iterator(); i.hasNext(); )
+      {
+        if (((Expr) i.next()).references(var))
+          {
+            return true;
+          }
+      }
+    return false;
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer("concat(");
+    int len = args.size();
+    for (int i = 0; i < len; i++)
+      {
+        if (i > 0)
+          {
+            buf.append(',');
+          }
+        buf.append(args.get(i));
+      }
+    buf.append(')');
+    return buf.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Constant.java

@@ -0,0 +1,98 @@
+/* Constant.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Constant value (string literal or number).
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class Constant
+  extends Expr
+{
+
+  final Object value;
+
+  public Constant(Object value)
+  {
+    this.value = value;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    return value;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new Constant(value);
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    String ret = value.toString();
+    if (value instanceof String)
+      {
+        if (ret.indexOf('\'') == -1)
+          {
+            return '\'' + ret + '\'';
+          }
+        else
+          {
+            return '"' + ret + '"';
+          }
+      }
+    if (value instanceof Double)
+      {
+        if (ret.endsWith(".0"))
+          {
+            ret = ret.substring(0, ret.length() - 2);
+          }
+      }
+    return ret;
+  }
+  
+} 

libjava/classpath/gnu/xml/xpath/ContainsFunction.java

@@ -0,0 +1,92 @@
+/* ContainsFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>contains</code> function returns true if the first argument
+ * string contains the second argument string, and otherwise returns false.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class ContainsFunction
+  extends Expr
+{
+
+  final Expr arg1;
+  final Expr arg2;
+
+  ContainsFunction(List args)
+  {
+    this((Expr) args.get(0), (Expr) args.get(1));
+  }
+
+  ContainsFunction(Expr arg1, Expr arg2)
+  {
+    this.arg1 = arg1;
+    this.arg2 = arg2;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val1 = arg1.evaluate(context, pos, len);
+    Object val2 = arg2.evaluate(context, pos, len);
+    String s1 = _string(context, val1);
+    String s2 = _string(context, val2);
+    return (s1.indexOf(s2) != -1) ? Boolean.TRUE : Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new ContainsFunction(arg1.clone(context), arg2.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg1.references(var) || arg2.references(var));
+  }
+
+  public String toString()
+  {
+    return "contains(" + arg1 + "," + arg2 + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/CountFunction.java

@@ -0,0 +1,88 @@
+/* CountFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>count</code> function returns the number of nodes in the
+ * argument node-set.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class CountFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  CountFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  CountFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    return new Double((double) ((Collection) val).size());
+  }
+
+  public Expr clone(Object context)
+  {
+    return new CountFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "count(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/DocumentOrderComparator.java

@@ -0,0 +1,63 @@
+/* DocumentOrderComparator.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Comparator;
+import org.w3c.dom.Node;
+
+/**
+ * Sorts nodes into document order.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class DocumentOrderComparator
+  implements Comparator
+{
+  
+  public int compare(Object o1, Object o2)
+  {
+    if (o1 instanceof Node && o2 instanceof Node)
+      {
+        Node n1 = (Node)o1;
+        Node n2 = (Node)o2;
+        return (int) n1.compareDocumentPosition(n2);
+      }
+    return 0;
+  }
+
+}

libjava/classpath/gnu/xml/xpath/EqualityExpr.java

@@ -0,0 +1,268 @@
+/* EqualityExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.Iterator;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Boolean equality expression.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class EqualityExpr
+  extends Expr
+{
+
+  final Expr lhs;
+  final Expr rhs;
+  final boolean invert;
+
+  EqualityExpr(Expr lhs, Expr rhs, boolean invert)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+    this.invert = invert;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    boolean val = evaluateImpl(context, pos, len);
+    if (invert)
+      {
+        return val ? Boolean.FALSE : Boolean.TRUE;
+      }
+    else
+      {
+        return val ? Boolean.TRUE : Boolean.FALSE;
+      }
+  }
+
+  private boolean evaluateImpl(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    Object right = rhs.evaluate(context, pos, len);
+
+    /*
+     * If both objects to be compared are node-sets, then the comparison
+     * will be true if and only if there is a node in the first node-set and
+     * a node in the second node-set such that the result of performing the
+     * comparison on the string-values of the two nodes is true.
+     */
+    boolean flns = left instanceof Collection;
+    boolean frns = right instanceof Collection;
+    if (flns && frns)
+      {
+        Collection lns = (Collection) left;
+        Collection rns = (Collection) right;
+        if (lns.isEmpty())
+          {
+            return false;
+          }
+        boolean all = true;
+        for (Iterator i = lns.iterator(); i.hasNext(); )
+          {
+            Node ltest = (Node) i.next();
+            for (Iterator j = rns.iterator(); j.hasNext(); )
+              {
+                Node rtest = (Node) j.next();
+                if (ltest == rtest || ltest.equals(rtest))
+                  {
+                    // much shorter
+                    if (!invert)
+                      {
+                        return true;
+                      }
+                  }
+                else if (stringValue(ltest).equals(stringValue(rtest)))
+                  {
+                    if (!invert)
+                      {
+                        return true;
+                      }
+                  }
+                else
+                  {
+                    all = false;
+                  }
+              }
+          }
+        return all;
+      }
+    /* 
+     * If one object to be compared is a node-set and the other is a number,
+     * then the comparison will be true if and only if there is a node in
+     * the node-set such that the result of performing the comparison on the
+     * number to be compared and on the result of converting the
+     * string-value of that node to a number using the number function is
+     * true.
+     */
+    boolean fln = left instanceof Double;
+    boolean frn = right instanceof Double;
+    if ((flns && frn) || (frns && fln))
+      {
+        Collection ns = flns ? (Collection) left : (Collection) right;
+        double n = fln ? ((Double) left).doubleValue() :
+          ((Double) right).doubleValue();
+        boolean all = true;
+        for (Iterator i = ns.iterator(); i.hasNext(); )
+          {
+            Node test = (Node) i.next();
+            double nn = _number(context, stringValue(test));
+            if (nn == n)
+              {
+                if (!invert)
+                  {
+                    return true;
+                  }
+              }
+            else
+              {
+                all = false;
+              }
+          }
+        return invert ? all : false;
+      }
+    /*
+     * If one object to be compared is a node-set and the other is a
+     * string, then the comparison will be true if and only if there is a
+     * node in the node-set such that the result of performing the
+     * comparison on the string-value of the node and the other string is
+     * true.
+     */
+    boolean fls = left instanceof String;
+    boolean frs = right instanceof String;
+    if ((flns && frs) || (frns && fls))
+      {
+        Collection ns = flns ? (Collection) left : (Collection) right;
+        String s = fls ? (String) left : (String) right;
+        boolean all = true;
+        for (Iterator i = ns.iterator(); i.hasNext(); )
+          {
+            Node test = (Node) i.next();
+            if (stringValue(test).equals(s))
+              {
+                if (!invert)
+                  {
+                    return true;
+                  }
+              }
+            else
+              {
+                all = false;
+              }
+          }
+        return invert ? all : false;
+      }
+    /*
+     * If one object to be compared is a node-set and the other is a
+     * boolean, then the comparison will be true if and only if the result
+     * of performing the comparison on the boolean and on the result of
+     * converting the node-set to a boolean using the boolean function is
+     * true.
+     */
+    boolean flb = left instanceof Boolean;
+    boolean frb = right instanceof Boolean;
+    if ((flns && frb) || (frns && flb))
+      {
+        Collection ns = flns ? (Collection) left : (Collection) right;
+        boolean b = flb ? ((Boolean) left).booleanValue() :
+          ((Boolean) right).booleanValue();
+        return _boolean(context, ns) == b;
+      }
+    /*
+     * If at least one object to be compared is a boolean, then each object
+     * to be compared is converted to a boolean as if by applying the
+     * boolean function.
+     */
+    if (flb || frb)
+      {
+        boolean lb = flb ? ((Boolean) left).booleanValue() :
+          _boolean(context, left);
+        boolean rb = frb ? ((Boolean) right).booleanValue() :
+          _boolean(context, right);
+        return lb == rb;
+      }
+    /*
+     * Otherwise, if at least one object to be compared is
+     * a number, then each object to be compared is converted to a number as
+     * if by applying the number function.
+     */
+    if (fln || frn)
+      {
+        double ln = fln ? ((Double) left).doubleValue() :
+          _number(context, left);
+        double rn = frn ? ((Double) right).doubleValue() :
+          _number(context, right);
+        return ln == rn;
+      }
+    /*
+     * Otherwise, both objects to be
+     * compared are converted to strings as if by applying the string
+     * function.
+     */
+    String ls = fls ? (String) left : _string(context, left);
+    String rs = frs ? (String) right : _string(context, right);
+    return ls.equals(rs);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new EqualityExpr(lhs.clone(context), rhs.clone(context), invert);
+  }
+
+  public boolean references(QName var)
+  {
+    return (lhs.references(var) || rhs.references(var));
+  }
+
+  public String toString()
+  {
+    if (invert)
+      {
+        return lhs + " != " + rhs;
+      }
+    else
+      {
+        return lhs + " = " + rhs;
+      }
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Expr.java

@@ -0,0 +1,476 @@
+/* Expr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.io.IOException;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.StringTokenizer;
+import javax.xml.namespace.QName;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * An XPath expression.
+ * This can be evaluated in the context of a node to produce a result.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public abstract class Expr
+  implements XPathExpression
+{
+
+  protected static final Comparator documentOrderComparator =
+    new DocumentOrderComparator();
+
+  protected static final DecimalFormat decimalFormat =
+    new DecimalFormat("####################################################" +
+                      ".####################################################",
+                      new DecimalFormatSymbols(Locale.US));
+
+  public Object evaluate(Object item, QName returnType)
+    throws XPathExpressionException
+  {
+    Object ret = null;
+    Node context = null;
+    if (item instanceof Node)
+      {
+        context = (Node) item;
+        ret = evaluate(context, 1, 1);
+        if (XPathConstants.STRING == returnType &&
+            !(ret instanceof String))
+          {
+            ret = _string(context, ret);
+          }
+        else if (XPathConstants.NUMBER == returnType &&
+                 !(ret instanceof Double))
+          {
+            ret = new Double(_number(context, ret));
+          }
+        else if (XPathConstants.BOOLEAN == returnType &&
+                 !(ret instanceof Boolean))
+          {
+            ret = _boolean(context, ret) ? Boolean.TRUE : Boolean.FALSE;
+          }
+        else if (XPathConstants.NODE == returnType)
+          {
+            if (ret instanceof Collection)
+              {
+                Collection ns = (Collection) ret;
+                switch (ns.size())
+                  {
+                  case 0:
+                    ret = null;
+                    break;
+                  case 1:
+                    ret = (Node) ns.iterator().next();
+                    break;
+                  default:
+                    throw new XPathExpressionException("multiple nodes in node-set");
+                  }
+              }
+            else if (ret != null)
+              {
+                throw new XPathExpressionException("return value is not a node-set");
+              }
+          }
+        else if (XPathConstants.NODESET == returnType)
+          {
+            if (ret != null && !(ret instanceof Collection))
+              {
+                throw new XPathExpressionException("return value is not a node-set");
+              }
+          }
+      }
+    return ret;
+  }
+
+  public String evaluate(Object item)
+    throws XPathExpressionException
+  {
+    return (String) evaluate(item, XPathConstants.STRING); 
+  }
+
+  public Object evaluate(InputSource source, QName returnType)
+    throws XPathExpressionException
+  {
+    try
+      {
+        DocumentBuilderFactory factory =
+          new gnu.xml.dom.JAXPFactory();
+        DocumentBuilder builder = factory.newDocumentBuilder();
+        Document doc = builder.parse(source);
+        return evaluate(doc, returnType);
+      }
+    catch (ParserConfigurationException e)
+      {
+        throw new XPathExpressionException(e); 
+      }
+    catch (SAXException e)
+      {
+        throw new XPathExpressionException(e); 
+      }
+    catch (IOException e)
+      {
+        throw new XPathExpressionException(e); 
+      }
+  }
+
+  public String evaluate(InputSource source)
+    throws XPathExpressionException
+  {
+    return (String) evaluate(source, XPathConstants.STRING);
+  }
+
+  public abstract Object evaluate(Node context, int pos, int len);
+
+  public abstract Expr clone(Object context);
+
+  public abstract boolean references(QName var);
+  
+  /* -- 4.1 Node Set Functions -- */
+
+  /**
+   * The id function selects elements by their unique ID.
+   * When the argument to id is of type node-set, then the result is
+   * the union of the result of applying id to the string-value of each of
+   * the nodes in the argument node-set. When the argument to id is of any
+   * other type, the argument is converted to a string as if by a call to
+   * the string function; the string is split into a whitespace-separated
+   * list of tokens (whitespace is any sequence of characters matching the
+   * production S); the result is a node-set containing the elements in the
+   * same document as the context node that have a unique ID equal to any of
+   * the tokens in the list.
+   */
+  public static Collection _id(Node context, Object object)
+  {
+    Set ret = new HashSet();
+    if (object instanceof Collection)
+      {
+        Collection nodeSet = (Collection) object;
+        for (Iterator i = nodeSet.iterator(); i.hasNext(); )
+          {
+            String string = stringValue((Node) i.next());
+            ret.addAll(_id (context, string));
+          }
+      }
+    else
+      {
+        Document doc = (context instanceof Document) ? (Document) context :
+          context.getOwnerDocument();
+        String string = _string(context, object);
+        StringTokenizer st = new StringTokenizer(string, " \t\r\n");
+        while (st.hasMoreTokens())
+          {
+            Node element = doc.getElementById(st.nextToken());
+            if (element != null)
+              {
+                ret.add(element);
+              }
+          }
+      }
+    return ret;
+  }
+
+  /**
+   * The local-name function returns the local part of the expanded-name of
+   * the node in the argument node-set that is first in document order. If
+   * the argument node-set is empty or the first node has no expanded-name,
+   * an empty string is returned. If the argument is omitted, it defaults to
+   * a node-set with the context node as its only member.
+   */
+  public static String _local_name(Node context, Collection nodeSet)
+  {
+    Node node = (nodeSet == null || nodeSet.size() == 0) ? context :
+      firstNode(nodeSet);
+    return node.getLocalName();
+  }
+
+  /**
+   * The namespace-uri function returns the namespace URI of the
+   * expanded-name of the node in the argument node-set that is first in
+   * document order. If the argument node-set is empty, the first node has
+   * no expanded-name, or the namespace URI of the expanded-name is null, an
+   * empty string is returned. If the argument is omitted, it defaults to a
+   * node-set with the context node as its only member.
+   */
+  public static String _namespace_uri(Node context, Collection nodeSet)
+  {
+    Node node = (nodeSet == null || nodeSet.size() == 0) ? context :
+      firstNode(nodeSet);
+    return node.getNamespaceURI();
+  }
+  
+  /**
+   * The name function returns a string containing a QName representing the
+   * expanded-name of the node in the argument node-set that is first in
+   * document order. The QName must represent the expanded-name with respect
+   * to the namespace declarations in effect on the node whose expanded-name
+   * is being represented. Typically, this will be the QName that occurred
+   * in the XML source. This need not be the case if there are namespace
+   * declarations in effect on the node that associate multiple prefixes
+   * with the same namespace. However, an implementation may include
+   * information about the original prefix in its representation of nodes;
+   * in this case, an implementation can ensure that the returned string is
+   * always the same as the QName used in the XML source. If the argument
+   * node-set is empty or the first node has no expanded-name, an empty
+   * string is returned. If the argument it omitted, it defaults to a
+   * node-set with the context node as its only member.
+   */
+  public static String _name(Node context, Collection nodeSet)
+  {
+    Node node = (nodeSet == null || nodeSet.size() == 0) ? context :
+      firstNode(nodeSet);
+    switch (node.getNodeType())
+      {
+      case Node.ATTRIBUTE_NODE:
+      case Node.ELEMENT_NODE:
+      case Node.PROCESSING_INSTRUCTION_NODE:
+        return node.getNodeName();
+      default:
+        return "";
+      }
+  }
+
+  /**
+   * Returns the first node in the set in document order.
+   */
+  static Node firstNode(Collection nodeSet)
+  {
+    List list = new ArrayList(nodeSet);
+    Collections.sort(list, documentOrderComparator);
+    return (Node) list.get(0);
+  }
+
+  /* -- 4.2 String Functions -- */
+
+  /**
+   * Implementation of the XPath <code>string</code> function.
+   */
+  public static String _string(Node context, Object object)
+  {
+    if (object == null)
+      {
+        return stringValue(context);
+      }
+    if (object instanceof String)
+      {
+        return (String) object;
+      }
+    if (object instanceof Boolean)
+      {
+        return object.toString();
+      }
+    if (object instanceof Double)
+      {
+        double d = ((Double) object).doubleValue();
+        if (Double.isNaN(d))
+          {
+            return "NaN";
+          }
+        else if (d == 0.0d)
+          {
+            return "0";
+          }
+        else if (Double.isInfinite(d))
+          {
+            if (d < 0)
+              {
+                return "-Infinity";
+              }
+            else
+              {
+                return "Infinity";
+              }
+          }
+        else
+          {
+            String ret = decimalFormat.format(d);
+            if (ret.endsWith (".0"))
+              { 
+                ret = ret.substring(0, ret.length() - 2);
+              }
+            return ret;
+          }
+      }
+    if (object instanceof Collection)
+      {
+        Collection nodeSet = (Collection) object;
+        if (nodeSet.isEmpty())
+          {
+            return "";
+          }
+        Node node = firstNode(nodeSet);
+        return stringValue(node);
+      }
+    throw new IllegalArgumentException(object.toString());
+  }
+
+  /* -- 4.3 Boolean Functions -- */
+  
+  /**
+   * Implementation of the XPath <code>boolean</code> function.
+   */
+  public static boolean _boolean(Node context, Object object)
+  {
+    if (object instanceof Boolean)
+      {
+        return ((Boolean) object).booleanValue();
+      }
+    if (object instanceof Double)
+      {
+        return ((Double) object).doubleValue() != 0.0;
+      }
+    if (object instanceof String)
+      {
+        return ((String) object).length() != 0;
+      }
+    if (object instanceof Collection)
+      {
+        return ((Collection) object).size() != 0;
+      }
+    return false; // TODO user defined types
+  }
+
+  /* -- 4.4 Number Functions -- */
+
+  /**
+   * Implementation of the XPath <code>number</code> function.
+   */
+  public static double _number(Node context, Object object)
+  {
+    if (object == null)
+      {
+        object = Collections.singleton(context);
+      }
+    if (object instanceof Double)
+      {
+        return ((Double) object).doubleValue();
+      }
+    if (object instanceof Boolean)
+      {
+        return ((Boolean) object).booleanValue() ? 1.0 : 0.0;
+      }
+    if (object instanceof Collection)
+      {
+        // Convert node-set to string
+        object = stringValue((Collection) object);
+      }
+    if (object instanceof String)
+      {
+        String string = ((String) object).trim();
+        try
+          {
+            return Double.parseDouble(string);
+          }
+        catch (NumberFormatException e)
+          {
+            return Double.NaN;
+          }
+      }
+    return Double.NaN; // TODO user-defined types
+  }
+
+  /**
+   * Computes the XPath string-value of the specified node-set.
+   */
+  public static String stringValue(Collection nodeSet)
+  {
+    StringBuffer buf = new StringBuffer();
+    for (Iterator i = nodeSet.iterator(); i.hasNext(); )
+      {
+        buf.append(stringValue((Node) i.next()));
+      }
+    return buf.toString();
+  }
+
+  /**
+   * Computes the XPath string-value of the specified node.
+   */
+  public static String stringValue(Node node)
+  {
+    return stringValue(node, false);
+  }
+  
+  static String stringValue(Node node, boolean elementMode)
+  {
+    switch (node.getNodeType())
+      {
+      case Node.DOCUMENT_NODE: // 5.1 Root Node
+      case Node.DOCUMENT_FRAGMENT_NODE:
+      case Node.ELEMENT_NODE: // 5.2 Element Nodes
+        StringBuffer buf = new StringBuffer();
+        for (Node ctx = node.getFirstChild(); ctx != null;
+             ctx = ctx.getNextSibling())
+          {
+            buf.append(stringValue(ctx, true));
+          }
+        return buf.toString();
+      case Node.TEXT_NODE: // 5.7 Text Nodes
+      case Node.CDATA_SECTION_NODE:
+        return node.getNodeValue();
+      case Node.ATTRIBUTE_NODE: // 5.3 Attribute Nodes
+      case Node.PROCESSING_INSTRUCTION_NODE: // 5.5 Processing Instruction
+      case Node.COMMENT_NODE: // 5.6 Comment Nodes
+        if (!elementMode)
+          {
+            return node.getNodeValue();
+          }
+      default:
+        return "";
+      }
+  }
+
+}

libjava/classpath/gnu/xml/xpath/FalseFunction.java

@@ -0,0 +1,72 @@
+/* FalseFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>false</code> function returns false.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class FalseFunction
+  extends Expr
+{
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    return Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new FalseFunction();
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    return "false()";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/FloorFunction.java

@@ -0,0 +1,89 @@
+/* FloorFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>floor</code> function returns the largest (closest to positive
+ * infinity) number that is not greater than the argument and that is an
+ * integer.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class FloorFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  FloorFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  FloorFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    double n = _number(context, val);
+    return new Double(Math.floor(n));
+  }
+
+  public Expr clone(Object context)
+  {
+    return new FloorFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "floor(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Function.java

@@ -0,0 +1,57 @@
+/* Function.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+
+/**
+ * Interface to be implemented by external functions that need to receive
+ * parameter values.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public interface Function
+{
+
+  /**
+   * Sets the list of expressions to evaluate as parameter values.
+   */
+  void setArguments(List args);
+
+}
+

libjava/classpath/gnu/xml/xpath/FunctionCall.java

@@ -0,0 +1,163 @@
+/* FunctionCall.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPathFunction;
+import javax.xml.xpath.XPathFunctionException;
+import javax.xml.xpath.XPathFunctionResolver;
+import org.w3c.dom.Node;
+
+/**
+ * Executes an XPath core or extension function.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class FunctionCall
+  extends Expr
+{
+
+  final XPathFunctionResolver resolver;
+  final String name;
+  final List args;
+
+  public FunctionCall(XPathFunctionResolver resolver, String name)
+  {
+    this(resolver, name, Collections.EMPTY_LIST);
+  }
+
+  public FunctionCall(XPathFunctionResolver resolver, String name, List args)
+  {
+    this.resolver = resolver;
+    this.name = name;
+    this.args = args;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    if (resolver != null)
+      {
+        QName qname = QName.valueOf(name);
+				int arity = args.size();
+        XPathFunction function = resolver.resolveFunction(qname, arity);
+        if (function != null)
+          {
+            //System.err.println("Calling "+toString()+" with "+values);
+            if (function instanceof Expr)
+              {
+                if (function instanceof Function)
+                  {
+                    ((Function) function).setArguments(args);
+                  }
+                return ((Expr) function).evaluate(context, pos, len);
+              }
+            else
+              {
+                List values = new ArrayList(arity);
+                for (int i = 0; i < arity; i++)
+                  {
+                    Expr arg = (Expr) args.get(i);
+                    values.add(arg.evaluate(context, pos, len));
+                  }
+                try
+                  {
+                    return function.evaluate(values);
+                  }
+                catch (XPathFunctionException e)
+                  {
+                    e.printStackTrace(System.err); // FIXME
+                    throw new RuntimeException(e.getMessage(), e);
+                  }
+              }
+          }
+      }
+    throw new IllegalArgumentException("Invalid function call: " +
+                                       toString());
+  }
+
+  public Expr clone(Object context)
+  {
+    int len = args.size();
+    List args2 = new ArrayList(len);
+    for (int i = 0; i < len; i++)
+      {
+        args2.add(((Expr) args.get(i)).clone(context));
+      }
+    XPathFunctionResolver r = resolver;
+    if (context instanceof XPathFunctionResolver)
+      {
+        r = (XPathFunctionResolver) context;
+      }
+    return new FunctionCall(r, name, args2);
+  }
+
+  public boolean references(QName var)
+  {
+    for (Iterator i = args.iterator(); i.hasNext(); )
+      {
+        if (((Expr) i.next()).references(var))
+          {
+            return true;
+          }
+      }
+    return false;
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer();
+    buf.append(name);
+    buf.append('(');
+    int len = args.size();
+    for (int i = 0; i < len; i++)
+      {
+        if (i > 0)
+          {
+            buf.append(',');
+          }
+        buf.append(args.get(i));
+      }
+    buf.append(')');
+    return buf.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/IdFunction.java

@@ -0,0 +1,102 @@
+/* IdFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>id</code> function selects elements by their unique ID.
+ * When the argument to id is of type node-set, then the result is
+ * the union of the result of applying id to the string-value of each of the
+ * nodes in the argument node-set. When the argument to id is of any other
+ * type, the argument is converted to a string as if by a call to the string
+ * function; the string is split into a whitespace-separated list of tokens
+ * (whitespace is any sequence of characters matching the production S); the
+ * result is a node-set containing the elements in the same document as the
+ * context node that have a unique ID equal to any of the tokens in the
+ * list.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class IdFunction
+  extends Pattern
+{
+
+  final Expr arg;
+
+  IdFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  public IdFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public boolean matches(Node context)
+  {
+    Object ret = evaluate(context, 1, 1);
+    return !((Collection) ret).isEmpty();
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    return _id(context, val);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new IdFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "id(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/LangFunction.java

@@ -0,0 +1,116 @@
+/* LangFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>lang</code> function returns true or false depending on whether
+ * the language of the context node as specified by xml:lang attributes is
+ * the same as or is a sublanguage of the language specified by the argument
+ * string. The language of the context node is determined by the value of
+ * the xml:lang attribute on the context node, or, if the context node has
+ * no xml:lang attribute, by the value of the xml:lang attribute on the
+ * nearest ancestor of the context node that has an xml:lang attribute. If
+ * there is no such attribute, then lang returns false. If there is such an
+ * attribute, then lang returns true if the attribute value is equal to the
+ * argument ignoring case, or if there is some suffix starting with - such
+ * that the attribute value is equal to the argument ignoring that suffix of
+ * the attribute value and ignoring case.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class LangFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  LangFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  LangFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    String lang = _string(context, val);
+    String clang = getLang(context);
+    while (clang == null && context != null)
+      {
+        context = context.getParentNode();
+        clang = getLang(context);
+      }
+    boolean ret = (clang == null) ? false :
+      clang.toLowerCase().startsWith(lang.toLowerCase());
+    return ret ? Boolean.TRUE : Boolean.FALSE;
+  }
+
+  String getLang(Node node)
+  {
+    if (node.getNodeType() == Node.ELEMENT_NODE)
+      {
+        return ((Element) node).getAttribute("xml:lang");
+      }
+    return null;
+  }
+  
+  public Expr clone(Object context)
+  {
+    return new IdFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "lang(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/LastFunction.java

@@ -0,0 +1,73 @@
+/* LastFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>last</code> function returns a number equal to the context
+ * size from the expression evaluation context.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class LastFunction
+  extends Expr
+{
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    return new Double((double) len);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new LastFunction();
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    return "last()";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/LocalNameFunction.java

@@ -0,0 +1,93 @@
+/* LocalNameFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>local-name</code> function returns the local part of the
+ * expanded-name of the node in the argument node-set that is first in
+ * document order.
+ * If the argument node-set is empty or the first node has no expanded-name,
+ * an empty string is returned. If the argument is omitted, it defaults to a
+ * node-set with the context node as its only member.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class LocalNameFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  LocalNameFunction(List args)
+  {
+    this(args.size() > 0 ? (Expr) args.get(0) : null);
+  }
+
+  LocalNameFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    return _local_name(context, (Collection) val);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new LocalNameFunction((arg == null) ? null :
+                                 arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg == null) ? false : arg.references(var);
+  }
+
+  public String toString()
+  {
+    return (arg == null) ? "local-name()" : "local-name(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NameFunction.java

@@ -0,0 +1,101 @@
+/* NameFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>name</code> function returns a string containing a QName
+ * representing the expanded-name of the node in the argument node-set that
+ * is first in document order. The QName must represent the expanded-name
+ * with respect to the namespace declarations in effect on the node whose
+ * expanded-name is being represented. Typically, this will be the QName
+ * that occurred in the XML source. This need not be the case if there are
+ * namespace declarations in effect on the node that associate multiple
+ * prefixes with the same namespace. However, an implementation may include
+ * information about the original prefix in its representation of nodes; in
+ * this case, an implementation can ensure that the returned string is
+ * always the same as the QName used in the XML source. If the argument
+ * node-set is empty or the first node has no expanded-name, an empty string
+ * is returned. If the argument it omitted, it defaults to a node-set with
+ * the context node as its only member.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NameFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  NameFunction(List args)
+  {
+    this(args.size() > 0 ? (Expr) args.get(0) : null);
+  }
+
+  NameFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    return _name(context, (Collection) val);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new NameFunction((arg == null) ? null :
+                            arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg == null) ? false : arg.references(var);
+  }
+  
+  public String toString()
+  {
+    return (arg == null) ? "name()" : "name(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NameTest.java

@@ -0,0 +1,142 @@
+/* NameTest.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.XMLConstants;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Tests whether a node has the specified name.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class NameTest
+  extends Test
+{
+
+  final QName qName;
+  final boolean anyLocalName;
+  final boolean any;
+
+  public NameTest(QName qName, boolean anyLocalName, boolean any)
+  {
+    this.anyLocalName = anyLocalName;
+    this.any = any;
+    this.qName = qName;
+  }
+
+  public boolean matchesAny()
+  {
+    return any;
+  }
+
+  public boolean matchesAnyLocalName()
+  {
+    return anyLocalName;
+  }
+
+  public boolean matches(Node node, int pos, int len)
+  {
+    switch (node.getNodeType())
+      {
+      case Node.ATTRIBUTE_NODE:
+        // Do not match namespace attributes
+        String uri = node.getNamespaceURI();
+        if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(uri) ||
+            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getPrefix()) ||
+            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getNodeName()))
+          {
+            return false;
+          }
+        // Fall through
+      case Node.ELEMENT_NODE:
+        break;
+      default:
+        return false;
+      }
+    if (any)
+      {
+        return true;
+      }
+    String uri = qName.getNamespaceURI();
+    String nodeUri = node.getNamespaceURI();
+    String nodeLocalName = node.getLocalName();
+    if (nodeLocalName != null && !equal(uri, nodeUri))
+      {
+        return false;
+      }
+    if (anyLocalName)
+      {
+        return true;
+      }
+    String localName = qName.getLocalPart();
+    if (nodeLocalName != null)
+      {
+        nodeLocalName = node.getNodeName();
+      }
+    return (localName.equals(nodeLocalName));
+  }
+
+  final boolean equal(String s1, String s2)
+  {
+    return (((s1 == null || s1.length() == 0) &&
+             (s2 == null || s2.length() == 0)) ||
+            s1 != null && s1.equals(s2));
+  }
+
+  public Test clone(Object context)
+  {
+    return new NameTest(qName, anyLocalName, any);
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString ()
+  {
+    if (any)
+      {
+        return "*";
+      }
+    return qName.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NamespaceTest.java

@@ -0,0 +1,128 @@
+/* NamespaceTest.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.XMLConstants;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Tests whether a namespace attribute has the specified name.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class NamespaceTest
+  extends Test
+{
+
+  final QName qName;
+  final boolean anyLocalName;
+  final boolean any;
+
+  public NamespaceTest(QName qName, boolean anyLocalName, boolean any)
+  {
+    this.anyLocalName = anyLocalName;
+    this.any = any;
+    this.qName = qName;
+  }
+
+  public boolean matchesAny()
+  {
+    return any;
+  }
+
+  public boolean matchesAnyLocalName()
+  {
+    return anyLocalName;
+  }
+
+  public boolean matches(Node node, int pos, int len)
+  {
+    switch (node.getNodeType())
+      {
+      case Node.ATTRIBUTE_NODE:
+        // Only match namespace attributes
+        String uri = node.getNamespaceURI();
+        if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(uri) ||
+            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getPrefix()) ||
+            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getNodeName()))
+          {
+            break;
+          }
+        // Fall through
+      default:
+        // Only process namespace attributes
+        return false;
+      }
+    if (any)
+      {
+        return true;
+      }
+    if (anyLocalName)
+      {
+        return true;
+      }
+    String localName = qName.getLocalPart();
+    String nodeLocalName = node.getLocalName();
+    if (nodeLocalName == null)
+      {
+        nodeLocalName = node.getNodeName();
+      }
+    return (localName.equals(nodeLocalName));
+  }
+
+  public Test clone(Object context)
+  {
+    return new NamespaceTest(qName, anyLocalName, any);
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString ()
+  {
+    if (any)
+      {
+        return "*";
+      }
+    return qName.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NamespaceUriFunction.java

@@ -0,0 +1,93 @@
+/* NamespaceUriFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>namespace-uri</code> function returns the namespace URI of the
+ * expanded-name of the node in the argument node-set that is first in
+ * document order. If the argument node-set is empty, the first node has no
+ * expanded-name, or the namespace URI of the expanded-name is null, an
+ * empty string is returned. If the argument is omitted, it defaults to a
+ * node-set with the context node as its only member.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NamespaceUriFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  NamespaceUriFunction(List args)
+  {
+    this(args.size() > 0 ? (Expr) args.get(0) : null);
+  }
+  
+  NamespaceUriFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    return _namespace_uri(context, (Collection) val);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new NamespaceUriFunction((arg == null) ? null :
+                                    arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg == null) ? false : arg.references(var);
+  }
+  
+  public String toString()
+  {
+    return (arg == null) ? "namespace-uri()" : "namespace-uri(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NegativeExpr.java

@@ -0,0 +1,81 @@
+/* NegativeExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Unary negative.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NegativeExpr
+  extends Expr
+{
+
+  final Expr expr;
+
+  NegativeExpr(Expr expr)
+  {
+    this.expr = expr;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = expr.evaluate(context, pos, len);
+    double n = _number(context, val);
+    return new Double(-n);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new NegativeExpr(expr.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return expr.references(var);
+  }
+
+  public String toString()
+  {
+    return "-" + expr;
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NodeTypeTest.java

@@ -0,0 +1,136 @@
+/* NodeTypeTest.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Tests whether a node is of a given type.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class NodeTypeTest
+  extends Test
+{
+
+  final short type;
+  final String data;
+
+  public NodeTypeTest(short type)
+  {
+    this(type, null);
+  }
+
+  public NodeTypeTest(short type, String data)
+  {
+    this.type = type;
+    this.data = data;
+  }
+
+  public short getNodeType()
+  {
+    return type;
+  }
+
+  public String getData()
+  {
+    return data;
+  }
+
+  public boolean matches(Node node, int pos, int len)
+  {
+    short nodeType = node.getNodeType();
+    switch (nodeType)
+      {
+      case Node.ELEMENT_NODE:
+      case Node.ATTRIBUTE_NODE:
+      case Node.TEXT_NODE:
+      case Node.CDATA_SECTION_NODE:
+      case Node.COMMENT_NODE:
+      case Node.PROCESSING_INSTRUCTION_NODE:
+        if (type > 0)
+          {
+            if (nodeType != type)
+              {
+                return false;
+              }
+            if (data != null && !data.equals(node.getNodeValue()))
+              {
+                return false;
+              }
+          }
+        return true;
+      default:
+        // Not part of XPath data model
+        return false;
+      }
+  }
+
+  public Test clone(Object context)
+  {
+    return new NodeTypeTest(type, data);
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    switch (type)
+      {
+      case 0:
+        return "node()";
+      case Node.TEXT_NODE:
+        return "text()";
+      case Node.COMMENT_NODE:
+        return "comment()";
+      case Node.PROCESSING_INSTRUCTION_NODE:
+        if (data != null)
+          {
+            return "processing-instruction('" + data + "')";
+          }
+        return "processing-instruction()";
+      default:
+        throw new IllegalStateException();
+      }
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NormalizeSpaceFunction.java

@@ -0,0 +1,105 @@
+/* NormalizeSpaceFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import java.util.StringTokenizer;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>normalize-space</code> function returns the argument string
+ * with whitespace normalized by stripping leading and trailing whitespace
+ * and replacing sequences of whitespace characters by a single space.
+ * Whitespace characters are the same as those allowed by the S production
+ * in XML. If the argument is omitted, it defaults to the context node
+ * converted to a string, in other words the string-value of the context
+ * node.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NormalizeSpaceFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  NormalizeSpaceFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+  
+  NormalizeSpaceFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    String s = _string(context, val);
+    StringTokenizer st = new StringTokenizer(s, " \t\r\n");
+    StringBuffer buf = new StringBuffer();
+    if (st.hasMoreTokens())
+      {
+        buf.append(st.nextToken()); 
+        while (st.hasMoreTokens())
+          {
+            buf.append(' ');
+            buf.append(st.nextToken());
+          }
+      }
+    return buf.toString();
+  }
+
+  public Expr clone(Object context)
+  {
+    return new NormalizeSpaceFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg == null) ? false : arg.references(var);
+  }
+
+  public String toString()
+  {
+    return (arg == null) ? "normalize-space()" : "normalize-space(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NotFunction.java

@@ -0,0 +1,87 @@
+/* NotFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>not</code> function returns true if its argument is false,
+ * and false otherwise.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NotFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  NotFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  NotFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    return _boolean(context, val) ? Boolean.FALSE : Boolean.TRUE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new NotFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "not(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/NumberFunction.java

@@ -0,0 +1,102 @@
+/* NumberFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>number</code> function converts its argument to a number as
+ * follows:
+ * <ul>
+ * <li>a string that consists of optional whitespace followed by an optional
+ * minus sign followed by a Number followed by whitespace is converted to
+ * the IEEE 754 number that is nearest (according to the IEEE 754
+ * round-to-nearest rule) to the mathematical value represented by the
+ * string; any other string is converted to NaN</li>
+ * <li>boolean true is converted to 1; boolean false is converted to 0</li>
+ * <li>a node-set is first converted to a string as if by a call to the
+ * string function and then converted in the same way as a string
+ * argument</li>
+ * <li>an object of a type other than the four basic types is converted to a
+ * number in a way that is dependent on that type</li>
+ * </ul>
+ * If the argument is omitted, it defaults to a node-set with the context
+ * node as its only member.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class NumberFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  NumberFunction(List args)
+  {
+    this(args.size() > 0 ? (Expr) args.get(0) : null);
+  }
+
+  NumberFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    return new Double(_number(context, val));
+  }
+
+  public Expr clone(Object context)
+  {
+    return new NumberFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "number(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/OrExpr.java

@@ -0,0 +1,87 @@
+/* OrExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Logical or.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class OrExpr
+  extends Expr
+{
+
+  final Expr lhs;
+  final Expr rhs;
+
+  public OrExpr(Expr lhs, Expr rhs)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    if (_boolean(context, left))
+      {
+        return Boolean.TRUE;
+      }
+    Object right = rhs.evaluate(context, pos, len);
+    return _boolean(context, right) ? Boolean.TRUE : Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new OrExpr(lhs.clone(context), rhs.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (lhs.references(var) || rhs.references(var));
+  }
+
+  public String toString()
+  {
+    return lhs + " or " + rhs;
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/ParenthesizedExpr.java

@@ -0,0 +1,90 @@
+/* ParenthesizedExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Simple subexpression.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class ParenthesizedExpr
+  extends Expr
+{
+
+  final Expr expr;
+
+  ParenthesizedExpr(Expr expr)
+  {
+    this.expr = expr;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object ret = expr.evaluate(context, pos, len);
+    if (ret instanceof Collection)
+      {
+        List list = new ArrayList((Collection) ret);
+        Collections.sort(list, documentOrderComparator);
+        ret = list;
+      }
+    return ret;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new ParenthesizedExpr(expr.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return expr.references(var);
+  }
+
+  public String toString()
+  {
+    return "(" + expr + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Path.java

@@ -0,0 +1,54 @@
+/* Path.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import org.w3c.dom.Node;
+
+/**
+ * An XPath path component expression.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+abstract class Path
+  extends Pattern
+{
+
+  abstract Collection evaluate(Node context, Collection nodeSet);
+  
+}

libjava/classpath/gnu/xml/xpath/Pattern.java

@@ -0,0 +1,54 @@
+/* Pattern.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import org.w3c.dom.Node;
+
+/**
+ * Interface implemented by expressions that can form part of XSL patterns.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public abstract class Pattern
+  extends Expr
+{
+
+  public abstract boolean matches(Node context);
+
+}
+

libjava/classpath/gnu/xml/xpath/PositionFunction.java

@@ -0,0 +1,73 @@
+/* PositionFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>position</code> function returns a number equal to the context
+ * position from the expression evaluation context.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class PositionFunction
+  extends Expr
+{
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    return new Double((double) pos);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new PositionFunction();
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    return "position()";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Predicate.java

@@ -0,0 +1,85 @@
+/* Predicate.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Tests whether an expression matches against a given context node.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+class Predicate
+  extends Test
+{
+
+  final Expr expr;
+
+  Predicate(Expr expr)
+  {
+    this.expr = expr;
+  }
+
+  public boolean matches(Node node, int pos, int len)
+  {
+    Object ret = expr.evaluate(node, pos, len);
+    if (ret instanceof Double)
+      {
+        // Same as [position() = x]
+        return ((Double) ret).intValue() == pos;
+      }
+    return Expr._boolean(node, expr.evaluate(node, pos, len));
+  }
+
+  public Test clone(Object context)
+  {
+    return new Predicate(expr.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return expr.references(var);
+  }
+  
+  public String toString()
+  {
+    return "[" + expr + "]";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/RelationalExpr.java

@@ -0,0 +1,107 @@
+/* RelationalExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * Numerical comparison expression.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class RelationalExpr
+  extends Expr
+{
+
+  final Expr lhs;
+  final Expr rhs;
+  final boolean lt;
+  final boolean eq;
+
+  RelationalExpr(Expr lhs, Expr rhs, boolean lt, boolean eq)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+    this.lt = lt;
+    this.eq = eq;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    Object right = rhs.evaluate(context, pos, len);
+    double ln = _number(context, left);
+    double rn = _number(context, right);
+    if (eq && ln == rn)
+      {
+        return Boolean.TRUE;
+      }
+    if (lt)
+      {
+        if (ln < rn || Double.isInfinite(rn))
+          {
+            return Boolean.TRUE;
+          }
+      }
+    else
+      {
+        if (ln > rn || Double.isInfinite(ln))
+          {
+            return Boolean.TRUE;
+          }
+      }
+    return Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new RelationalExpr(lhs.clone(context), rhs.clone(context), lt, eq);
+  }
+
+  public boolean references(QName var)
+  {
+    return (lhs.references(var) || rhs.references(var));
+  }
+
+  public String toString()
+  {
+    return lhs + " " + (lt ? "<" : ">") + (eq ? "=" : "") + " " + rhs;
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Root.java

@@ -0,0 +1,87 @@
+/* Root.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.Collections;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+/**
+ * Expression that evaluates to the document root.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class Root
+  extends Path
+{
+
+  public boolean matches(Node node)
+  {
+    return (node.getNodeType() == Node.DOCUMENT_NODE);
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    return evaluate(context, Collections.EMPTY_SET);
+  }
+
+  Collection evaluate(Node context, Collection ns)
+  {
+    Document doc = (context instanceof Document) ? (Document) context :
+      context.getOwnerDocument();
+    return Collections.singleton(doc);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new Root();
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    return "/";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/RoundFunction.java

@@ -0,0 +1,96 @@
+/* RoundFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>round</code> function returns the number that is closest to the
+ * argument and that is an integer. If there are two such numbers, then the
+ * one that is closest to positive infinity is returned. If the argument is
+ * NaN, then NaN is returned. If the argument is positive infinity, then
+ * positive infinity is returned. If the argument is negative infinity, then
+ * negative infinity is returned. If the argument is positive zero, then
+ * positive zero is returned. If the argument is negative zero, then
+ * negative zero is returned. If the argument is less than zero, but greater
+ * than or equal to -0.5, then negative zero is returned.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class RoundFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  RoundFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  RoundFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    double n = _number(context, val);
+    return (Double.isNaN(n) || Double.isInfinite(n)) ?
+      new Double(n) : new Double(Math.round(n));
+  }
+
+  public Expr clone(Object context)
+  {
+    return new RoundFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "round(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Selector.java

@@ -0,0 +1,519 @@
+/* Selector.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import javax.xml.XMLConstants;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Attr;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+
+/**
+ * A single component of a location path.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class Selector
+  extends Path
+{
+
+  public static final int ANCESTOR = 0;
+  public static final int ANCESTOR_OR_SELF = 1;
+  public static final int ATTRIBUTE = 2;
+  public static final int CHILD = 3;
+  public static final int DESCENDANT = 4;
+  public static final int DESCENDANT_OR_SELF = 5;
+  public static final int FOLLOWING = 6;
+  public static final int FOLLOWING_SIBLING = 7;
+  public static final int NAMESPACE = 8;
+  public static final int PARENT = 9;
+  public static final int PRECEDING = 10;
+  public static final int PRECEDING_SIBLING = 11;
+  public static final int SELF = 12;
+
+  /**
+   * Axis to select nodes in.
+   */
+  final int axis;
+
+  /**
+   * List of tests to perform on candidates.
+   */
+  final Test[] tests;
+
+  public Selector(int axis, List tests)
+  {
+    this.axis = axis;
+    this.tests = new Test[tests.size()];
+    tests.toArray(this.tests);
+    if (axis == NAMESPACE &&
+        this.tests.length > 0 &&
+        this.tests[0] instanceof NameTest)
+      {
+        NameTest nt = (NameTest) this.tests[0];
+        this.tests[0] = new NamespaceTest(nt.qName, nt.anyLocalName, nt.any);
+      }
+  }
+
+  /**
+   * Returns the list of tests to perform on candidates.
+   */
+  public Test[] getTests()
+  {
+    return tests;
+  }
+
+  public boolean matches(Node context)
+  {
+    short nodeType = context.getNodeType();
+    switch (axis)
+      {
+      case CHILD:
+        if (nodeType == Node.ATTRIBUTE_NODE)
+          {
+            return false;
+          }
+        break;
+      case ATTRIBUTE:
+      case NAMESPACE:
+        if (nodeType != Node.ATTRIBUTE_NODE)
+          {
+            return false;
+          }
+        break;
+      case DESCENDANT_OR_SELF:
+        return true;
+      default:
+        return false;
+      }
+    int tlen = tests.length;
+    if (tlen > 0)
+      {
+        int pos = getContextPosition(context);
+        int len = getContextSize(context);
+        for (int j = 0; j < tlen && len > 0; j++)
+          {
+            Test test = tests[j];
+            if (!test.matches(context, pos, len))
+              {
+                return false;
+              }
+          }
+      }
+    return true;
+  }
+
+  private int getContextPosition(Node ctx)
+  {
+    int pos = 1;
+    for (ctx = ctx.getPreviousSibling(); ctx != null;
+         ctx = ctx.getPreviousSibling())
+      {
+        pos++;
+      }
+    return pos;
+  }
+
+  private int getContextSize(Node ctx)
+  {
+    if (ctx.getNodeType() == Node.ATTRIBUTE_NODE)
+      {
+        Node parent = ((Attr) ctx).getOwnerElement();
+        return parent.getAttributes().getLength();
+      }
+    Node parent = ctx.getParentNode();
+    if (parent != null)
+      {
+        return parent.getChildNodes().getLength();
+      }
+    return 1;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Set acc = new LinkedHashSet();
+    addCandidates(context, acc);
+    List candidates = new ArrayList(acc);
+    //Collections.sort(candidates, documentOrderComparator);
+    List ret = filterCandidates(candidates, false);
+    return ret;
+  }
+
+  Collection evaluate(Node context, Collection ns)
+  {
+    Set acc = new LinkedHashSet();
+    for (Iterator i = ns.iterator(); i.hasNext(); )
+      {
+        addCandidates((Node) i.next(), acc);
+      }
+    List candidates = new ArrayList(acc);
+    //Collections.sort(candidates, documentOrderComparator);
+    List ret = filterCandidates(candidates, true);
+    return ret;
+  }
+
+  /**
+   * Filter the given list of candidates according to the node tests.
+   */
+  List filterCandidates(List candidates, boolean cascade)
+  {
+    int len = candidates.size();
+    int tlen = tests.length;
+    if (tlen > 0 && len > 0)
+      {
+        // Present the result of each successful generation to the next test
+        for (int j = 0; j < tlen && len > 0; j++)
+          {
+            Test test = tests[j];
+            List successful = new ArrayList(len);
+            for (int i = 0; i < len; i++)
+              {
+                Node node = (Node) candidates.get(i);
+                if (cascade)
+                  {
+                    // Documents and DocumentFragments should be considered
+                    // if part of a location path where the axis involves
+                    // the SELF concept
+                    short nodeType = node.getNodeType();
+                    if ((nodeType == Node.DOCUMENT_NODE ||
+                         nodeType == Node.DOCUMENT_FRAGMENT_NODE) &&
+                        (axis == DESCENDANT_OR_SELF ||
+                         axis == ANCESTOR_OR_SELF ||
+                         axis == SELF) &&
+                        (tests.length == 1 &&
+                         tests[0] instanceof NodeTypeTest &&
+                         ((NodeTypeTest) tests[0]).type == (short) 0))
+                      {
+                        successful.add(node);
+                        continue;
+                      }
+                  }
+                if (test.matches(node, i + 1, len))
+                  {
+                    successful.add(node);
+                  }
+                /*
+                   System.err.println("Testing "+node);
+                   int p = getContextPosition(node);
+                   int l = getContextSize(node);
+                   if (test.matches(node, p, l))
+                   {
+                   successful.add(node);
+                   }*/
+              }
+            candidates = successful;
+            len = candidates.size();
+          }
+      }
+    return candidates;
+  }
+
+  void addCandidates(Node context, Collection candidates)
+  {
+    // Build list of candidates
+    switch (axis)
+      {
+      case CHILD:
+        addChildNodes(context, candidates, false);
+        break;
+      case DESCENDANT:
+        addChildNodes(context, candidates, true);
+        break;
+      case DESCENDANT_OR_SELF:
+        candidates.add (context);
+        addChildNodes(context, candidates, true);
+        break;
+      case PARENT:
+        addParentNode(context, candidates, false);
+        break;
+      case ANCESTOR:
+        addParentNode(context, candidates, true);
+        break;
+      case ANCESTOR_OR_SELF:
+        candidates.add(context);
+        addParentNode(context, candidates, true);
+        break;
+      case FOLLOWING_SIBLING:
+        addFollowingNodes(context, candidates, false);
+        break;
+      case PRECEDING_SIBLING:
+        addPrecedingNodes(context, candidates, false);
+        break;
+      case FOLLOWING:
+        addFollowingNodes(context, candidates, true);
+        break;
+      case PRECEDING:
+        addPrecedingNodes(context, candidates, true);
+        break;
+      case ATTRIBUTE:
+        addAttributes(context, candidates);
+        break;
+      case NAMESPACE:
+        addNamespaceAttributes(context, candidates);
+        break;
+      case SELF:
+        candidates.add(context);
+        break;
+      }
+  }
+
+  void addChildNodes(Node context, Collection acc, boolean recurse)
+  {
+    Node child = context.getFirstChild();
+    while (child != null)
+      {
+        acc.add(child);
+        if (recurse)
+          {
+            addChildNodes(child, acc, recurse);
+          }
+        child = child.getNextSibling();
+      }
+  }
+
+  void addParentNode(Node context, Collection acc, boolean recurse)
+  {
+    Node parent = (context.getNodeType() == Node.ATTRIBUTE_NODE) ?
+      ((Attr) context).getOwnerElement() : context.getParentNode();
+    if (parent != null)
+      {
+        acc.add(parent);
+        if (recurse)
+          {
+            addParentNode(parent, acc, recurse);
+          }
+      }
+  }
+
+  void addFollowingNodes(Node context, Collection acc, boolean recurse)
+  {
+    Node cur = context.getNextSibling();
+    while (cur != null)
+      {
+        acc.add(cur);
+        if (recurse)
+          {
+            addChildNodes(cur, acc, true);
+          }
+        cur = cur.getNextSibling();
+      }
+    if (recurse)
+      {
+        context = (context.getNodeType() == Node.ATTRIBUTE_NODE) ?
+          ((Attr) context).getOwnerElement() : context.getParentNode();
+        if (context != null)
+          {
+            addFollowingNodes(context, acc, recurse);
+          }
+      }
+  }
+
+  void addPrecedingNodes(Node context, Collection acc, boolean recurse)
+  {
+    Node cur = context.getPreviousSibling();
+    while (cur != null)
+      {
+        acc.add(cur);
+        if (recurse)
+          {
+            addChildNodes(cur, acc, true);
+          }
+        cur = cur.getPreviousSibling();
+      }
+    if (recurse)
+      {
+        context = (context.getNodeType() == Node.ATTRIBUTE_NODE) ?
+          ((Attr) context).getOwnerElement() : context.getParentNode();
+        if (context != null)
+          {
+            addPrecedingNodes(context, acc, recurse);
+          }
+      }
+  }
+
+  void addAttributes(Node context, Collection acc)
+  {
+    NamedNodeMap attrs = context.getAttributes();
+    if (attrs != null)
+      {
+        int attrLen = attrs.getLength();
+        for (int i = 0; i < attrLen; i++)
+          {
+            Node attr = attrs.item(i);
+            if (!isNamespaceAttribute(attr))
+              {
+                acc.add(attr);
+              }
+          }
+      }
+  }
+
+  void addNamespaceAttributes(Node context, Collection acc)
+  {
+    NamedNodeMap attrs = context.getAttributes();
+    if (attrs != null)
+      {
+        int attrLen = attrs.getLength();
+        for (int i = 0; i < attrLen; i++)
+          {
+            Node attr = attrs.item(i);
+            if (isNamespaceAttribute(attr))
+              {
+                acc.add(attr);
+              }
+          }
+      }
+  }
+
+  final boolean isNamespaceAttribute(Node node)
+  {
+    String uri = node.getNamespaceURI();
+    return (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(uri) ||
+            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getPrefix()) ||
+            XMLConstants.XMLNS_ATTRIBUTE.equals(node.getNodeName()));
+  }
+
+  public Expr clone(Object context)
+  {
+    int len = tests.length;
+    List tests2 = new ArrayList(len);
+    for (int i = 0; i < len; i++)
+      {
+        tests2.add(tests[i].clone(context));
+      }
+    return new Selector(axis, tests2);
+  }
+
+  public boolean references(QName var)
+  {
+    for (int i = 0; i < tests.length; i++)
+      {
+        if (tests[i].references(var))
+          {
+            return true;
+          }
+      }
+    return false;
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer();
+    switch (axis)
+      {
+      case ANCESTOR:
+        buf.append("ancestor::");
+        break;
+      case ANCESTOR_OR_SELF:
+        buf.append("ancestor-or-self::");
+        break;
+      case ATTRIBUTE:
+        if (tests.length == 0 ||
+            (tests[0] instanceof NameTest))
+          {
+            buf.append('@');
+          }
+        else
+          {
+            buf.append("attribute::");
+          }
+        break;
+      case CHILD:
+        //buf.append("child::");
+        break;
+      case DESCENDANT:
+        buf.append("descendant::");
+        break;
+      case DESCENDANT_OR_SELF:
+        buf.append("descendant-or-self::");
+        break;
+      case FOLLOWING:
+        buf.append("following::");
+        break;
+      case FOLLOWING_SIBLING:
+        buf.append("following-sibling::");
+        break;
+      case NAMESPACE:
+        buf.append("namespace::");
+        break;
+      case PARENT:
+        if (tests.length == 0 ||
+            (tests[0] instanceof NodeTypeTest &&
+             ((NodeTypeTest) tests[0]).type == 0))
+          {
+            return "..";
+          }
+        buf.append("parent::");
+        break;
+      case PRECEDING:
+        buf.append("preceding::");
+        break;
+      case PRECEDING_SIBLING:
+        buf.append("preceding-sibling::");
+        break;
+      case SELF:
+        if (tests.length == 0 ||
+            (tests[0] instanceof NodeTypeTest &&
+             ((NodeTypeTest) tests[0]).type == 0))
+          {
+            return ".";
+          }
+        buf.append("self::");
+        break;
+      }
+    if (tests.length == 0)
+      {
+        buf.append('*');
+      }
+    else
+      {
+        for (int i = 0; i < tests.length; i++)
+          {
+            buf.append(tests[i]);
+          }
+      }
+    return buf.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/StartsWithFunction.java

@@ -0,0 +1,92 @@
+/* StartsWithFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>starts-with</code> function returns true if the first argument
+ * string starts with the second argument string, and otherwise returns false.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class StartsWithFunction
+  extends Expr
+{
+
+  final Expr arg1;
+  final Expr arg2;
+
+  StartsWithFunction(List args)
+  {
+    this((Expr) args.get(0), (Expr) args.get(1));
+  }
+
+  StartsWithFunction(Expr arg1, Expr arg2)
+  {
+    this.arg1 = arg1;
+    this.arg2 = arg2;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val1 = arg1.evaluate(context, pos, len);
+    Object val2 = arg2.evaluate(context, pos, len);
+    String s1 = _string(context, val1);
+    String s2 = _string(context, val2);
+    return s1.startsWith(s2) ? Boolean.TRUE : Boolean.FALSE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new StartsWithFunction(arg1.clone(context), arg2.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg1.references(var) || arg2.references(var));
+  }
+
+  public String toString()
+  {
+    return "starts-with(" + arg1 + "," + arg2 + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Steps.java

@@ -0,0 +1,253 @@
+/* Steps.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.LinkedList;
+import java.util.Set;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Attr;
+import org.w3c.dom.Node;
+
+/**
+ * A list of transitions between components in a location path.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class Steps
+  extends Path
+{
+
+  final LinkedList path;
+
+  public Steps()
+  {
+    this(new LinkedList());
+  }
+
+  Steps(LinkedList path)
+  {
+    this.path = path;
+  }
+
+  public boolean matches(Node context)
+  {
+    // Right to left
+    return matches(context, path.size() - 1);
+  }
+
+  boolean matches(Node context, int pos)
+  {
+    Pattern right = (Pattern) path.get(pos);
+    if (!right.matches(context))
+      {
+        return false;
+      }
+    if (pos > 0)
+      {
+        Pattern left = (Pattern) path.get(pos - 1);
+        Iterator j = possibleContexts(right, context).iterator();
+        while (j.hasNext())
+          {
+            Node candidate = (Node) j.next();
+            if (left.matches(candidate) &&
+                matches(candidate, pos - 1))
+              {
+                return true;
+              }
+            // keep going, there may be another candidate
+          }
+        return false;
+      }
+    return true;
+  }
+
+  /**
+   * Essentially the reverse of Selector.addCandidates.
+   * The idea is to determine possible context nodes for a match.
+   */
+  Collection possibleContexts(Pattern pattern, Node context)
+  {
+    if (pattern instanceof Selector)
+      {
+        Selector s = (Selector) pattern;
+        Collection candidates = new LinkedHashSet();
+        switch (s.axis)
+          {
+          case Selector.PARENT:
+            s.addChildNodes(context, candidates, false);
+            break;
+          case Selector.ANCESTOR:
+            s.addChildNodes(context, candidates, true);
+            break;
+          case Selector.ANCESTOR_OR_SELF:
+            candidates.add (context);
+            s.addChildNodes(context, candidates, true);
+            break;
+          case Selector.CHILD:
+            s.addParentNode(context, candidates, false);
+            break;
+          case Selector.DESCENDANT:
+            s.addParentNode(context, candidates, true);
+            break;
+          case Selector.DESCENDANT_OR_SELF:
+            candidates.add(context);
+            s.addParentNode(context, candidates, true);
+            break;
+          case Selector.PRECEDING_SIBLING:
+            s.addFollowingNodes(context, candidates, false);
+            break;
+          case Selector.FOLLOWING_SIBLING:
+            s.addPrecedingNodes(context, candidates, false);
+            break;
+          case Selector.PRECEDING:
+            s.addFollowingNodes(context, candidates, true);
+            break;
+          case Selector.FOLLOWING:
+            s.addPrecedingNodes(context, candidates, true);
+            break;
+          case Selector.ATTRIBUTE:
+          case Selector.NAMESPACE:
+            if (context.getNodeType() == Node.ATTRIBUTE_NODE)
+              {
+                candidates.add(((Attr) context).getOwnerElement());
+              }
+            break;
+          case Selector.SELF:
+            candidates.add(context);
+            break;
+          }
+        return candidates;
+      }
+    return Collections.EMPTY_SET;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    //System.err.println(toString()+" evaluate");
+    // Left to right
+    Iterator i = path.iterator();
+    Expr lhs = (Expr) i.next();
+    Object val = lhs.evaluate(context, pos, len);
+    //System.err.println("\tevaluate "+lhs+" = "+val);
+    while (val instanceof Collection && i.hasNext())
+      {
+        Path rhs = (Path) i.next();
+        val = rhs.evaluate(context, (Collection) val);
+        //System.err.println("\tevaluate "+rhs+" = "+val);
+      }
+    return val;
+  }
+
+  Collection evaluate(Node context, Collection ns)
+  {
+    // Left to right
+    Iterator i = path.iterator();
+    Expr lhs = (Expr) i.next();
+    if (lhs instanceof Path)
+      {
+        ns = ((Path) lhs).evaluate(context, ns);
+      }
+    else
+      {
+        Set acc = new LinkedHashSet();
+        int pos = 1, len = ns.size();
+        for (Iterator j = ns.iterator(); j.hasNext(); )
+          {
+            Node node = (Node) j.next();
+            Object ret = lhs.evaluate(node, pos++, len);
+            if (ret instanceof Collection)
+              {
+                acc.addAll((Collection) ret);
+              }
+          }
+        ns = acc;
+      }
+    while (i.hasNext())
+      {
+        Path rhs = (Path) i.next();
+        ns = rhs.evaluate(context, ns);
+      }
+    return ns;
+  }
+
+  public Expr clone(Object context)
+  {
+    int len = path.size();
+    LinkedList path2 = new LinkedList();
+    for (int i = 0; i < len; i++)
+      {
+        path2.add(((Expr) path.get(i)).clone(context));
+      }
+    return new Steps(path2);
+  }
+
+  public boolean references(QName var)
+  {
+    for (Iterator i = path.iterator(); i.hasNext(); )
+      {
+        if (((Expr) i.next()).references(var))
+          {
+            return true;
+          }
+      }
+    return false;
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer();
+    Iterator i = path.iterator();
+    Expr expr = (Expr) i.next();
+    if (!(expr instanceof Root))
+      {
+        buf.append(expr);
+      }
+    while (i.hasNext())
+      {
+        expr = (Expr) i.next();
+        buf.append('/');
+        buf.append(expr);
+      }
+    return buf.toString();
+  }
+
+}

libjava/classpath/gnu/xml/xpath/StringFunction.java

@@ -0,0 +1,119 @@
+/* StringFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>string function converts an object to a string as follows:
+ * <ul>
+ * <li>A node-set is converted to a string by returning the string-value of
+ * the node in the node-set that is first in document order. If the node-set
+ * is empty, an empty string is returned.</li>
+ * <li>A number is converted to a string as follows
+ * <ul>
+ * <li>NaN is converted to the string NaN</li>
+ * <li>positive zero is converted to the string 0</li>
+ * <li>negative zero is converted to the string 0</li>
+ * <li>positive infinity is converted to the string Infinity</li>
+ * <li>negative infinity is converted to the string -Infinity</li>
+ * <li>if the number is an integer, the number is represented in decimal
+ * form as a Number with no decimal point and no leading zeros, preceded by
+ * a minus sign (-) if the number is negative</li>
+ * <li>otherwise, the number is represented in decimal form as a Number
+ * including a decimal point with at least one digit before the decimal
+ * point and at least one digit after the decimal point, preceded by a minus
+ * sign (-) if the number is negative; there must be no leading zeros before
+ * the decimal point apart possibly from the one required digit immediately
+ * before the decimal point; beyond the one required digit after the decimal
+ * point there must be as many, but only as many, more digits as are needed
+ * to uniquely distinguish the number from all other IEEE 754 numeric
+ * values.</li>
+ * </ul>
+ * </li>
+ * <li>The boolean false value is converted to the string false. The boolean
+ * true value is converted to the string true.</li>
+ * <li>An object of a type other than the four basic types is converted to a
+ * string in a way that is dependent on that type.</li>
+ * </ul>
+ * If the argument is omitted, it defaults to a node-set with the context
+ * node as its only member.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class StringFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  StringFunction(List args)
+  {
+    this(args.size() > 0 ? (Expr) args.get(0) : null);
+  }
+  
+  StringFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    return _string(context, val);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new StringFunction((arg == null) ? null :
+                              arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg == null) ? false : arg.references(var);
+  }
+
+  public String toString()
+  {
+    return (arg == null) ? "string()" : "string(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/StringLengthFunction.java

@@ -0,0 +1,91 @@
+/* StringLengthFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>string-length</code> function returns the number of characters
+ * in the string.
+ * If the argument is omitted, it defaults to the context node converted to
+ * a string, in other words the string-value of the context node.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class StringLengthFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  StringLengthFunction(List args)
+  {
+    this(args.isEmpty() ? null : (Expr) args.get(0));
+  }
+  
+  StringLengthFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = (arg == null) ? null : arg.evaluate(context, pos, len);
+    String s = _string(context, val);
+    return new Double((double) s.length());
+  }
+
+  public Expr clone(Object context)
+  {
+    return new StringLengthFunction((arg == null) ? null :
+                                    arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg == null) ? false : arg.references(var);
+  }
+
+  public String toString()
+  {
+    return (arg == null) ? "string-length()" : "string-length(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/SubstringAfterFunction.java

@@ -0,0 +1,98 @@
+/* SubstringAfterFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>substring-after</code> function returns the substring of the
+ * first argument string that follows the first occurrence of the second
+ * argument string in the first argument string, or the empty string if the
+ * first argument string does not contain the second argument string. For
+ * example, substring-after("1999/04/01","/") returns 04/01, and
+ * substring-after("1999/04/01","19") returns 99/04/01.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class SubstringAfterFunction
+  extends Expr
+{
+
+  final Expr arg1;
+  final Expr arg2;
+
+  SubstringAfterFunction(List args)
+  {
+    this((Expr) args.get(0), (Expr) args.get(1));
+  }
+
+  SubstringAfterFunction(Expr arg1, Expr arg2)
+  {
+    this.arg1 = arg1;
+    this.arg2 = arg2;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val1 = arg1.evaluate(context, pos, len);
+    Object val2 = arg2.evaluate(context, pos, len);
+    String s1 = _string(context, val1);
+    String s2 = _string(context, val2);
+    int index = s1.indexOf(s2);
+    return (index == -1) ? "" : s1.substring(index + s2.length());
+  }
+
+  public Expr clone(Object context)
+  {
+    return new SubstringAfterFunction(arg1.clone(context),
+                                      arg2.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg1.references(var) || arg2.references(var));
+  }
+
+  public String toString()
+  {
+    return "substring-after(" + arg1 + "," + arg2 + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/SubstringBeforeFunction.java

@@ -0,0 +1,97 @@
+/* SubstringBeforeFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>substring-before</code> function returns the substring of the
+ * first argument string that precedes the first occurrence of the second
+ * argument string in the first argument string, or the empty string if the
+ * first argument string does not contain the second argument string. For
+ * example, substring-before("1999/04/01","/") returns 1999.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class SubstringBeforeFunction
+  extends Expr
+{
+
+  final Expr arg1;
+  final Expr arg2;
+
+  SubstringBeforeFunction(List args)
+  {
+    this((Expr) args.get(0), (Expr) args.get(1));
+  }
+
+  SubstringBeforeFunction(Expr arg1, Expr arg2)
+  {
+    this.arg1 = arg1;
+    this.arg2 = arg2;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val1 = arg1.evaluate(context, pos, len);
+    Object val2 = arg2.evaluate(context, pos, len);
+    String s1 = _string(context, val1);
+    String s2 = _string(context, val2);
+    int index = s1.indexOf(s2);
+    return (index == -1) ? "" : s1.substring(0, index);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new SubstringBeforeFunction(arg1.clone(context),
+                                       arg2.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg1.references(var) || arg2.references(var));
+  }
+
+  public String toString()
+  {
+    return "substring-before(" + arg1 + "," + arg2 + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/SubstringFunction.java

@@ -0,0 +1,129 @@
+/* SubstringFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The substring function returns the substring of the first argument
+ * starting at the position specified in the second argument with length
+ * specified in the third argument. For example, substring("12345",2,3)
+ * returns "234". If the third argument is not specified, it returns the
+ * substring starting at the position specified in the second argument and
+ * continuing to the end of the string. For example, substring("12345",2)
+ * returns "2345".
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class SubstringFunction
+  extends Expr
+{
+
+  final Expr arg1;
+  final Expr arg2;
+  final Expr arg3;
+
+  SubstringFunction(List args)
+  {
+    this((Expr) args.get(0), (Expr) args.get(1),
+         (args.size() > 2) ? (Expr) args.get(2) : null);
+  }
+
+  SubstringFunction(Expr arg1, Expr arg2, Expr arg3)
+  {
+    this.arg1 = arg1;
+    this.arg2 = arg2;
+    this.arg3 = arg3;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val1 = arg1.evaluate(context, pos, len);
+    Object val2 = arg2.evaluate(context, pos, len);
+    String s = _string(context, val1);
+    int p = (val2 instanceof Double) ?
+      ((Double) val2).intValue() :
+        (int) Math.round(_number(context, val2));
+    p--;
+    if (p < 0)
+      {
+        p = 0;
+      }
+
+    int l = s.length() - p;
+    if (l <= 0)
+      {
+        return "";
+      }
+
+    if (arg3 != null)
+      {
+        Object val3 = arg3.evaluate(context, pos, len);
+        int v3 = (val3 instanceof Double) ?
+          ((Double) val3).intValue() :
+            (int) Math.round(_number(context, val3));
+        if (v3 < l) 
+          {
+            l = v3;
+          }
+      }
+
+    return s.substring(p, p + l);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new SubstringFunction(arg1.clone(context), arg2.clone(context),
+                                 (arg3 == null) ? null : arg3.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg1.references(var) || arg2.references(var) ||
+            (arg3 == null) ? false : arg3.references(var));
+  }
+
+  public String toString()
+  {
+    return (arg3 == null) ? "substring(" + arg1 + "," + arg2 + ")" :
+      "substring(" + arg1 + "," + arg2 + "," + arg3 + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/SumFunction.java

@@ -0,0 +1,100 @@
+/* SumFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>sum</code> function returns the sum, for each node in the
+ * argument node-set, of the result of converting the string-values of the
+ * node to a number.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class SumFunction
+  extends Expr
+{
+
+  final Expr arg;
+
+  SumFunction(List args)
+  {
+    this((Expr) args.get(0));
+  }
+
+  SumFunction(Expr arg)
+  {
+    this.arg = arg;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val = arg.evaluate(context, pos, len);
+    double sum = 0.0d;
+    if (val instanceof Collection)
+      {
+        for (Iterator i = ((Collection) val).iterator(); i.hasNext(); )
+          {
+            Node node = (Node) i.next();
+            String s = stringValue(node);
+            sum += _number(context, s);
+          }
+      }
+    return new Double(sum);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new SumFunction(arg.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return arg.references(var);
+  }
+
+  public String toString()
+  {
+    return "sum(" + arg + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/Test.java

@@ -0,0 +1,58 @@
+/* Test.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * A test that can be performed on a node to determine whether to include it
+ * in a selection.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public abstract class Test
+{
+
+  public abstract boolean matches(Node node, int pos, int len);
+
+  public abstract Test clone(Object context);
+
+  public abstract boolean references(QName var);
+
+}

libjava/classpath/gnu/xml/xpath/TranslateFunction.java

@@ -0,0 +1,133 @@
+/* TranslateFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.List;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>translate</code> function returns the first argument string
+ * with occurrences of characters in the second argument string replaced by
+ * the character at the corresponding position in the third argument string.
+ * For example, translate("bar","abc","ABC") returns the string BAr. If
+ * there is a character in the second argument string with no character at a
+ * corresponding position in the third argument string (because the second
+ * argument string is longer than the third argument string), then
+ * occurrences of that character in the first argument string are removed.
+ * For example, translate("--aaa--","abc-","ABC") returns "AAA". If a
+ * character occurs more than once in the second argument string, then the
+ * first occurrence determines the replacement character. If the third
+ * argument string is longer than the second argument string, then excess
+ * characters are ignored.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class TranslateFunction
+  extends Expr
+{
+
+  final Expr arg1;
+  final Expr arg2;
+  final Expr arg3;
+
+  TranslateFunction(List args)
+  {
+    this((Expr) args.get(0), (Expr) args.get(1), (Expr) args.get(2));
+  }
+
+  TranslateFunction(Expr arg1, Expr arg2, Expr arg3)
+  {
+    this.arg1 = arg1;
+    this.arg2 = arg2;
+    this.arg3 = arg3;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object val1 = arg1.evaluate(context, pos, len);
+    Object val2 = arg2.evaluate(context, pos, len);
+    Object val3 = arg3.evaluate(context, pos, len);
+    String string = _string(context, val1);
+    String search = _string(context, val2);
+    String replace = _string(context, val3);
+    StringBuffer buf = new StringBuffer();
+    int l1 = string.length();
+    int l2 = search.length();
+    int l3 = replace.length();
+    for (int i = 0; i < l1; i++)
+      {
+        char c = string.charAt(i);
+        boolean replaced = false;
+        for (int j = 0; j < l2; j++)
+          {
+            if (c == search.charAt(j))
+              {
+                if (j < l3)
+                  {
+                    buf.append(replace.charAt(j));
+                  }
+                replaced = true;
+              }
+          }
+        if (!replaced)
+          {
+            buf.append(c);
+          } 
+      } 
+    return new String(buf);
+  }
+
+  public Expr clone(Object context)
+  {
+    return new TranslateFunction(arg1.clone(context), arg2.clone(context),
+                                 arg3.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (arg1.references(var) || arg2.references(var) ||
+            arg3.references(var));
+  }
+  
+  public String toString()
+  {
+    return "translate(" + arg1 + "," + arg2 + "," + arg3 + ")";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/TrueFunction.java

@@ -0,0 +1,72 @@
+/* TrueFunction.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The <code>true</code> function returns true.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class TrueFunction
+  extends Expr
+{
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    return Boolean.TRUE;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new TrueFunction();
+  }
+
+  public boolean references(QName var)
+  {
+    return false;
+  }
+
+  public String toString()
+  {
+    return "true()";
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/UnionExpr.java

@@ -0,0 +1,108 @@
+/* UnionExpr.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import javax.xml.namespace.QName;
+import org.w3c.dom.Node;
+
+/**
+ * The union of two node-sets.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public final class UnionExpr
+  extends Pattern
+{
+
+  final Expr lhs;
+  final Expr rhs;
+
+  public UnionExpr(Expr lhs, Expr rhs)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+  }
+
+  public boolean matches(Node context)
+  {
+    if (lhs instanceof Pattern && rhs instanceof Pattern)
+      {
+        return ((Pattern) lhs).matches(context) ||
+          ((Pattern) rhs).matches(context);
+      }
+    return false;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    Object right = rhs.evaluate(context, pos, len);
+    if (left instanceof Collection && right instanceof Collection)
+      {
+        Set set = new HashSet();
+        set.addAll ((Collection) left);
+        set.addAll ((Collection) right);
+        List list = new ArrayList(set);
+        Collections.sort(list, documentOrderComparator);
+        return list;
+      }
+    return Collections.EMPTY_SET;
+  }
+
+  public Expr clone(Object context)
+  {
+    return new UnionExpr(lhs.clone(context), rhs.clone(context));
+  }
+
+  public boolean references(QName var)
+  {
+    return (lhs.references(var) || rhs.references(var));
+  }
+
+  public String toString()
+  {
+    return lhs + " | " + rhs;
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/VariableReference.java

@@ -0,0 +1,100 @@
+/* VariableReference.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPathVariableResolver;
+import org.w3c.dom.Node;
+import gnu.xml.transform.Bindings;
+
+public class VariableReference
+  extends Expr
+{
+
+  final XPathVariableResolver resolver;
+  final QName name;
+
+  public VariableReference(XPathVariableResolver resolver, QName name)
+  {
+    this.resolver = resolver;
+    this.name = name;
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    if (resolver != null)
+      {
+        if (resolver instanceof Bindings)
+          {
+            // Needs context to operate properly
+            return ((Bindings) resolver).get(name, context, pos, len);
+          }
+        return resolver.resolveVariable(name);
+      }
+    throw new IllegalStateException("no variable resolver");
+  }
+
+  public Expr clone(Object context)
+  {
+    XPathVariableResolver r = resolver;
+    if (context instanceof XPathVariableResolver)
+      {
+        r = (XPathVariableResolver) context;
+      }
+    return new VariableReference(r, name);
+  }
+
+  public boolean references(QName var)
+  {
+    return name.equals(var);
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer("$");
+    String prefix = name.getPrefix();
+    if (prefix != null && !"".equals(prefix))
+      {
+        buf.append(prefix);
+        buf.append(':');
+      }
+    buf.append(name.getLocalPart());
+    return buf.toString();
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/XPathFactoryImpl.java

@@ -0,0 +1,90 @@
+/* XPathFactoryImpl.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathFactory;
+import javax.xml.xpath.XPathFactoryConfigurationException;
+import javax.xml.xpath.XPathFunctionResolver;
+import javax.xml.xpath.XPathVariableResolver;
+
+/**
+ * GNU XPath factory implementation.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class XPathFactoryImpl
+  extends XPathFactory
+{
+
+  XPathVariableResolver variableResolver;
+  XPathFunctionResolver functionResolver;
+
+  public boolean isObjectModelSupported(String objectModel)
+  {
+    return XPathFactory.DEFAULT_OBJECT_MODEL_URI.equals(objectModel);
+  }
+
+  public void setFeature(String name, boolean value)
+    throws XPathFactoryConfigurationException
+  {
+    throw new XPathFactoryConfigurationException(name);
+  }
+
+  public boolean getFeature(String name)
+    throws XPathFactoryConfigurationException
+  {
+    throw new XPathFactoryConfigurationException(name);
+  }
+
+  public void setXPathVariableResolver(XPathVariableResolver resolver)
+  {
+    variableResolver = resolver;
+  }
+
+  public void setXPathFunctionResolver(XPathFunctionResolver resolver)
+  {
+    functionResolver = resolver;
+  }
+
+  public XPath newXPath()
+  {
+    return new XPathImpl(null, variableResolver, functionResolver);
+  }
+  
+}

libjava/classpath/gnu/xml/xpath/XPathImpl.java

@@ -0,0 +1,164 @@
+/* XPathImpl.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.io.IOException;
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFunctionResolver;
+import javax.xml.xpath.XPathVariableResolver;
+import org.xml.sax.InputSource;
+
+/**
+ * JAXP XPath implementation.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class XPathImpl
+  implements XPath
+{
+
+  XPathParser parser;
+  NamespaceContext namespaceContext;
+  XPathVariableResolver variableResolver;
+  XPathFunctionResolver functionResolver;
+
+  XPathImpl(NamespaceContext namespaceContext,
+            XPathVariableResolver variableResolver,
+            XPathFunctionResolver functionResolver)
+  {
+    parser = new XPathParser();
+    this.namespaceContext = namespaceContext;
+    this.variableResolver = variableResolver;
+    this.functionResolver = functionResolver;
+    reset();
+  }
+
+  public void reset()
+  {
+    parser.namespaceContext = namespaceContext;
+    parser.variableResolver = variableResolver;
+    parser.functionResolver = functionResolver;
+  }
+
+  public void setXPathVariableResolver(XPathVariableResolver resolver)
+  {
+    parser.variableResolver = resolver;
+  }
+
+  public XPathVariableResolver getXPathVariableResolver()
+  {
+    return parser.variableResolver;
+  }
+
+  public void setXPathFunctionResolver(XPathFunctionResolver resolver)
+  {
+    parser.functionResolver = resolver;
+  }
+
+  public XPathFunctionResolver getXPathFunctionResolver()
+  {
+    return parser.functionResolver;
+  }
+
+  public void setNamespaceContext(NamespaceContext nsContext)
+  {
+    parser.namespaceContext = nsContext;
+  }
+
+  public NamespaceContext getNamespaceContext()
+  {
+    return parser.namespaceContext;
+  }
+
+  public XPathExpression compile(String expression)
+    throws XPathExpressionException
+  {
+    XPathTokenizer tokenizer = new XPathTokenizer(expression);
+    try
+      {
+        return (Expr) parser.yyparse(tokenizer);
+      }
+    catch (IOException e)
+      {
+        throw new XPathExpressionException(e);
+      }
+    catch (XPathParser.yyException e)
+      {
+        throw new XPathExpressionException(expression);
+      }
+  }
+  
+  public Object evaluate(String expression,
+                         Object item,
+                         QName returnType)
+    throws XPathExpressionException
+  {
+    XPathExpression expr = compile(expression);
+    return expr.evaluate(item, returnType);
+  }
+
+  public String evaluate(String expression,
+                         Object item)
+    throws XPathExpressionException
+  {
+    XPathExpression expr = compile(expression);
+    return expr.evaluate(item);
+  }
+
+  public Object evaluate(String expression,
+                         InputSource source,
+                         QName returnType)
+    throws XPathExpressionException
+  {
+    XPathExpression expr = compile(expression);
+    return expr.evaluate(source, returnType);
+  }
+
+  public String evaluate(String expression,
+                         InputSource source)
+    throws XPathExpressionException
+  {
+    XPathExpression expr = compile(expression);
+    return expr.evaluate(source);
+  }
+
+}

libjava/classpath/gnu/xml/xpath/XPathParser.y

@@ -0,0 +1,784 @@
+%{
+/*
+ * XPathParser.java
+ * Copyright (C) 2004 The Free Software Foundation
+ * 
+ * This file is part of GNU JAXP, a library.
+ *
+ * GNU JAXP is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * GNU JAXP is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Linking this library statically or dynamically with other modules is
+ * making a combined work based on this library.  Thus, the terms and
+ * conditions of the GNU General Public License cover the whole
+ * combination.
+ *
+ * As a special exception, the copyright holders of this library give you
+ * permission to link this library with independent modules to produce an
+ * executable, regardless of the license terms of these independent
+ * modules, and to copy and distribute the resulting executable under
+ * terms of your choice, provided that you also meet, for each linked
+ * independent module, the terms and conditions of the license of that
+ * module.  An independent module is a module which is not derived from
+ * or based on this library.  If you modify this library, you may extend
+ * this exception to your version of the library, but you are not
+ * obliged to do so.  If you do not wish to do so, delete this
+ * exception statement from your version. 
+ */
+
+package gnu.xml.xpath;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+import javax.xml.xpath.XPathFunctionResolver;
+import javax.xml.xpath.XPathVariableResolver;
+import org.w3c.dom.Node;
+
+/**
+ * An XPath 1.0 parser.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class XPathParser
+{
+
+  NamespaceContext namespaceContext;
+  XPathVariableResolver variableResolver;
+  XPathFunctionResolver functionResolver;
+
+  QName getQName(String name)
+  {
+    QName qName = QName.valueOf(name);
+    if (namespaceContext != null)
+      {
+        String prefix = qName.getPrefix();
+        String uri = qName.getNamespaceURI();
+        if (prefix != null && (uri == null || uri.length() == 0))
+          {
+            uri = namespaceContext.getNamespaceURI(prefix);
+            String localName = qName.getLocalPart();
+            qName = new QName(uri, localName, prefix);
+          }
+      }
+    return qName;
+  }
+
+  Expr lookupFunction(String name, List args)
+  {
+    int arity = args.size();
+    if ("position".equals(name) && arity == 0)
+      {
+        return new PositionFunction();
+      }
+    else if ("last".equals(name) && arity == 0)
+      {
+        return new LastFunction();
+      }
+    else if ("string".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new StringFunction(args);
+      }
+    else if ("number".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new NumberFunction(args);
+      }
+    else if ("boolean".equals(name) && arity == 1)
+      {
+        return new BooleanFunction(args);
+      }
+    else if ("count".equals(name) && arity == 1)
+      {
+        return new CountFunction(args);
+      }
+    else if ("not".equals(name) && arity == 1)
+      {
+        return new NotFunction(args);
+      }
+    else if ("id".equals(name) && arity == 1)
+      {
+        return new IdFunction(args);
+      }
+    else if ("concat".equals(name) && arity > 1)
+      {
+        return new ConcatFunction(args);
+      }
+    else if ("true".equals(name) && arity == 0)
+      {
+        return new TrueFunction();
+      }
+    else if ("false".equals(name) && arity == 0)
+      {
+        return new FalseFunction();
+      }
+    else if ("name".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new NameFunction(args);
+      }
+    else if ("local-name".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new LocalNameFunction(args);
+      }
+    else if ("namespace-uri".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new NamespaceUriFunction(args);
+      }
+    else if ("starts-with".equals(name) && arity == 2)
+      {
+        return new StartsWithFunction(args);
+      }
+    else if ("contains".equals(name) && arity == 2)
+      {
+        return new ContainsFunction(args);
+      }
+    else if ("string-length".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new StringLengthFunction(args);
+      }
+    else if ("translate".equals(name) && arity == 3)
+      {
+        return new TranslateFunction(args);
+      }
+    else if ("normalize-space".equals(name) && (arity == 1 || arity == 0))
+      {
+        return new NormalizeSpaceFunction(args);
+      }
+    else if ("substring".equals(name) && (arity == 2 || arity == 3))
+      {
+        return new SubstringFunction(args);
+      }
+    else if ("substring-before".equals(name) && arity == 2)
+      {
+        return new SubstringBeforeFunction(args);
+      }
+    else if ("substring-after".equals(name) && arity == 2)
+      {
+        return new SubstringAfterFunction(args);
+      }
+    else if ("lang".equals(name) && arity == 1)
+      {
+        return new LangFunction(args);
+      }
+    else if ("sum".equals(name) && arity == 1)
+      {
+        return new SumFunction(args);
+      }
+    else if ("floor".equals(name) && arity == 1)
+      {
+        return new FloorFunction(args);
+      }
+    else if ("ceiling".equals(name) && arity == 1)
+      {
+        return new CeilingFunction(args);
+      }
+    else if ("round".equals(name) && arity == 1)
+      {
+        return new RoundFunction(args);
+      }
+    else if (functionResolver != null)
+      {
+        QName qName = QName.valueOf(name);
+        Object function = functionResolver.resolveFunction(qName, arity);
+        if (function != null &&
+            function instanceof Function &&
+            function instanceof Expr)
+          {
+            Function f = (Function) function;
+            f.setArguments(args);
+            return (Expr) function;
+          }
+      }
+    return new FunctionCall(functionResolver, name, args);
+  }
+
+%}
+
+%token LITERAL
+%token DIGITS
+%token NAME
+
+%token LP // '('
+%token RP // ')'
+%token LB // '['
+%token RB // ']'
+%token COMMA // ','
+%token PIPE // '|'
+%token SLASH // '/'
+%token DOUBLE_SLASH // '//'
+%token EQ // '='
+%token NE // '!='
+%token GT // '>'
+%token LT // '<'
+%token GTE // '>='
+%token LTE // '<='
+%token PLUS // '+'
+%token MINUS // '-'
+%token AT // '@'
+%token STAR // '*'
+%token DOLLAR // '$'
+%token COLON // ':'
+%token DOUBLE_COLON // '::'
+%token DOT // '.'
+%token DOUBLE_DOT // '..'
+
+%token ANCESTOR
+%token ANCESTOR_OR_SELF
+%token ATTRIBUTE
+%token CHILD
+%token DESCENDANT
+%token DESCENDANT_OR_SELF
+%token FOLLOWING
+%token FOLLOWING_SIBLING
+%token NAMESPACE
+%token PARENT
+%token PRECEDING
+%token PRECEDING_SIBLING
+%token SELF
+%token DIV
+%token MOD
+%token OR
+%token AND
+%token COMMENT
+%token PROCESSING_INSTRUCTION
+%token TEXT
+%token NODE
+
+%right UNARY
+
+%start expr
+
+%%
+
+expr:
+  or_expr
+  ;
+
+location_path:
+  relative_location_path
+  | absolute_location_path
+  ;
+
+absolute_location_path:
+  SLASH
+    {
+      $$ = new Root();
+    }
+  | SLASH relative_location_path
+    {
+      Steps steps;
+      if ($2 instanceof Steps)
+        {
+          steps = (Steps) $2;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($2);
+        }
+      steps.path.addFirst(new Root());
+      $$ = steps;
+      //$$ = new Step(new Root(), (Path) $2);
+    }
+  | DOUBLE_SLASH relative_location_path
+    {
+      Test nt = new NodeTypeTest((short) 0);
+      Selector s = new Selector(Selector.DESCENDANT_OR_SELF,
+                                Collections.singletonList (nt));
+      Steps steps;
+      if ($2 instanceof Steps)
+        {
+          steps = (Steps) $2;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($2);
+        }
+      steps.path.addFirst(s);
+      steps.path.addFirst(new Root());
+      $$ = steps;
+      //Step step = new Step(s, (Path) $2);
+      //$$ = new Step(new Root(), step);
+    }
+  ;
+
+relative_location_path:
+  step
+  | relative_location_path SLASH step
+    {
+      Steps steps;
+      if ($1 instanceof Steps)
+        {
+          steps = (Steps) $1;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($1);
+        }
+      steps.path.addLast($3);
+      $$ = steps;
+      //$$ = new Step((Expr) $1, (Path) $3);
+    }
+  | relative_location_path DOUBLE_SLASH step
+    {
+      Test nt = new NodeTypeTest((short) 0);
+      Selector s = new Selector(Selector.DESCENDANT_OR_SELF,
+                                Collections.singletonList (nt));
+      Steps steps;
+      if ($1 instanceof Steps)
+        {
+          steps = (Steps) $1;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($1);
+        }
+      steps.path.addLast(s);
+      steps.path.addLast($3);
+      $$ = steps;
+      //Step step = new Step(s, (Path) $3);
+      //$$ = new Step((Expr) $1, step);
+    }
+  ;
+
+step:
+  step_node_test
+    {
+      $$ = new Selector (Selector.CHILD, (List) $1);
+    }
+  | AT step_node_test
+    {
+      $$ = new Selector (Selector.ATTRIBUTE, (List) $2);
+    }
+  | axis_name DOUBLE_COLON step_node_test
+    {
+      $$ = new Selector (((Integer) $1).intValue (), (List) $3);
+    }
+  | DOT
+    {
+      $$ = new Selector (Selector.SELF, Collections.EMPTY_LIST);
+    }
+  | DOUBLE_DOT
+    {
+      $$ = new Selector (Selector.PARENT, Collections.EMPTY_LIST);
+    }
+  ;
+
+step_node_test:
+  node_test
+    {
+      List list = new ArrayList();
+      list.add($1);
+      $$ = list;
+    }
+  | step_node_test predicate
+    {
+      List list = (List)$1;
+      list.add($2);
+      $$ = list;
+    }
+  ;
+
+/*predicate_list:
+  predicate
+    {
+      List list = new ArrayList ();
+      list.add ($1);
+      $$ = list;
+    }
+  | predicate predicate_list
+    {
+      List list = (List) $3;
+      list.add (0, $1);
+      $$ = list;
+    }
+  ;*/
+
+axis_name:
+  ANCESTOR
+    {
+      $$ = new Integer(Selector.ANCESTOR);
+    }
+  | ANCESTOR_OR_SELF
+    {
+      $$ = new Integer(Selector.ANCESTOR_OR_SELF);
+    }
+  | ATTRIBUTE
+    {
+      $$ = new Integer(Selector.ATTRIBUTE);
+    }
+  | CHILD
+    {
+      $$ = new Integer(Selector.CHILD);
+    }
+  | DESCENDANT
+    {
+      $$ = new Integer(Selector.DESCENDANT);
+    }
+  | DESCENDANT_OR_SELF
+    {
+      $$ = new Integer(Selector.DESCENDANT_OR_SELF);
+    }
+  | FOLLOWING
+    {
+      $$ = new Integer(Selector.FOLLOWING);
+    }
+  | FOLLOWING_SIBLING
+    {
+      $$ = new Integer(Selector.FOLLOWING_SIBLING);
+    }
+  | NAMESPACE
+    {
+      $$ = new Integer(Selector.NAMESPACE);
+    }
+  | PARENT
+    {
+      $$ = new Integer(Selector.PARENT);
+    }
+  | PRECEDING
+    {
+      $$ = new Integer(Selector.PRECEDING);
+    }
+  | PRECEDING_SIBLING
+    {
+      $$ = new Integer(Selector.PRECEDING_SIBLING);
+    }
+  | SELF
+    {
+      $$ = new Integer(Selector.SELF);
+    }
+  ;
+
+node_test:
+  name_test
+  /*| PROCESSING_INSTRUCTION LP LITERAL RP*/
+  | PROCESSING_INSTRUCTION LITERAL RP
+    {
+      $$ = new NodeTypeTest(Node.PROCESSING_INSTRUCTION_NODE, (String) $2);
+    }
+  /*| node_type LP RP*/
+  | node_type RP
+    {
+      $$ = new NodeTypeTest(((Short) $1).shortValue());
+    }
+  ;
+
+predicate:
+  LB expr RB
+    {
+      $$ = new Predicate((Expr) $2);
+    }
+  ;
+
+primary_expr:
+  variable_reference
+  | LP expr RP
+    {
+      $$ = new ParenthesizedExpr((Expr) $2);
+    }
+  | LITERAL
+    {
+      $$ = new Constant($1);
+    }
+  | number
+    {
+      $$ = new Constant($1);
+    }
+  | function_call
+  ;
+
+function_call:
+  function_name LP RP
+    {
+      $$ = lookupFunction((String) $1, Collections.EMPTY_LIST);
+    }
+  | function_name LP argument_list RP
+    {
+      $$ = lookupFunction((String) $1, (List) $3);
+    }
+  ;
+
+argument_list:
+  expr
+    {
+      List list = new ArrayList();
+      list.add($1);
+      $$ = list;
+    }
+  | expr COMMA argument_list
+    {
+      List list = (List) $3;
+      list.add(0, $1);
+      $$ = list;
+    }
+  ;
+
+union_expr:
+  path_expr
+  | union_expr PIPE path_expr
+    {
+      $$ = new UnionExpr((Expr) $1, (Expr) $3);
+    }
+  ;
+
+path_expr:
+  location_path
+  | filter_expr
+  | filter_expr SLASH relative_location_path
+    {
+      Steps steps;
+      if ($3 instanceof Steps)
+        {
+          steps = (Steps) $3;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($3);
+        }
+      steps.path.addFirst($1);
+      $$ = steps;
+      //$$ = new Step ((Expr) $1, (Path) $3);
+    }
+  | filter_expr DOUBLE_SLASH relative_location_path
+    {
+      Test nt = new NodeTypeTest((short) 0);
+      Selector s = new Selector(Selector.DESCENDANT_OR_SELF,
+                                Collections.singletonList(nt));
+      Steps steps;
+      if ($3 instanceof Steps)
+        {
+          steps = (Steps) $3;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($3);
+        }
+      steps.path.addFirst(s);
+      steps.path.addFirst($1);
+      $$ = steps;
+      //Step step = new Step (s, (Path) $3);
+      //$$ = new Step ((Expr) $1, step);
+    }
+  ;
+
+filter_expr:
+  primary_expr
+  | filter_expr predicate
+    {
+      Predicate filter = (Predicate) $2;
+      Selector s = new Selector(Selector.SELF,
+                                Collections.singletonList(filter));
+      Steps steps;
+      if ($1 instanceof Steps)
+        {
+          steps = (Steps) $1;
+        }
+      else
+        {
+          steps = new Steps();
+          steps.path.addFirst($1);
+        }
+      steps.path.addLast(s);
+      $$ = steps;
+      //$$ = new Step ((Expr) $1, s);
+    }
+  ;
+
+or_expr:
+  and_expr
+  | or_expr OR and_expr
+    {
+      $$ = new OrExpr((Expr) $1, (Expr) $3);
+    }
+  ;
+
+and_expr:
+  equality_expr
+  | and_expr AND equality_expr
+    {
+      $$ = new AndExpr((Expr) $1, (Expr) $3);
+    }
+  ;
+
+equality_expr:
+  relational_expr
+  | equality_expr EQ relational_expr
+    {
+      $$ = new EqualityExpr((Expr) $1, (Expr) $3, false);
+    }
+  | equality_expr NE relational_expr
+    {
+      $$ = new EqualityExpr((Expr) $1, (Expr) $3, true);
+    }
+  ;
+
+relational_expr:
+  additive_expr
+  | relational_expr LT additive_expr
+    {
+      $$ = new RelationalExpr((Expr) $1, (Expr) $3, true, false);
+    }
+  | relational_expr GT additive_expr
+    {
+      $$ = new RelationalExpr((Expr) $1, (Expr) $3, false, false);
+    }
+  | relational_expr LTE additive_expr
+    {
+      $$ = new RelationalExpr((Expr) $1, (Expr) $3, true, true);
+    }
+  | relational_expr GTE additive_expr
+    {
+      $$ = new RelationalExpr((Expr) $1, (Expr) $3, false, true);
+    }
+  ;
+
+additive_expr:
+  multiplicative_expr
+  | additive_expr PLUS multiplicative_expr
+    {
+      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.ADD);
+    }
+  | additive_expr MINUS multiplicative_expr
+    {
+      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.SUBTRACT);
+    }
+  ;
+
+multiplicative_expr:
+  unary_expr
+  | multiplicative_expr STAR unary_expr
+    {
+      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.MULTIPLY);
+    }
+  | multiplicative_expr DIV unary_expr
+    {
+      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.DIVIDE);
+    }
+  | multiplicative_expr MOD unary_expr
+    {
+      $$ = new ArithmeticExpr((Expr) $1, (Expr) $3, ArithmeticExpr.MODULO);
+    }
+  ;
+
+unary_expr:
+  union_expr
+  | MINUS unary_expr %prec UNARY
+    {
+      $$ = new NegativeExpr((Expr) $2);
+    }
+  ;
+
+number:
+  DIGITS
+    {
+      $$ = new Double((String) $1 + ".0");
+    }
+  | DIGITS DOT
+    {
+      $$ = new Double((String) $1 + ".0");
+    }
+  | DIGITS DOT DIGITS
+    {
+      $$ = new Double((String) $1 + "." + (String) $3);
+    }
+  | DOT DIGITS
+    {
+      $$ = new Double("0." + (String) $2);
+    }
+  ;
+
+function_name:
+  qname
+/*  | node_type
+    {
+      switch (((Short) $1).shortValue ())
+        {
+        case Node.COMMENT_NODE:
+          $$ = "comment";
+          break;
+        case Node.TEXT_NODE:
+          $$ = "text";
+          break;
+        case Node.PROCESSING_INSTRUCTION_NODE:
+          $$ = "processing-instruction";
+          break;
+        default:
+          $$ = "node";
+          break;
+        }
+    }*/
+  ;
+
+variable_reference:
+  DOLLAR qname
+    {
+      String name = (String) $2;
+      $$ = new VariableReference(variableResolver, getQName(name));
+    }
+  ;
+
+name_test:
+  STAR
+    {
+      $$ = new NameTest(null, true, true);
+    }
+  | NAME COLON STAR
+    {
+      QName qName = getQName((String) $1);
+      $$ = new NameTest(qName, true, false);
+    }
+  | qname
+    {
+      QName qName = getQName((String) $1);
+      $$ = new NameTest(qName, false, false);
+    }
+  ;
+
+qname:
+  NAME
+  | NAME COLON NAME
+    {
+      $$ = (String) $1 + ':' + (String) $3;
+    }
+  ;
+
+node_type:
+  COMMENT
+    {
+      $$ = new Short(Node.COMMENT_NODE);
+    }
+  | TEXT
+    {
+      $$ = new Short(Node.TEXT_NODE);
+    }
+  | PROCESSING_INSTRUCTION
+    {
+      $$ = new Short(Node.PROCESSING_INSTRUCTION_NODE);
+    }
+  | NODE
+    {
+      $$ = new Short((short) 0);
+    }
+  ;
+
+%%
+
+}

libjava/classpath/gnu/xml/xpath/XPathTokenizer.java

@@ -0,0 +1,592 @@
+/* XPathTokenizer.java -- 
+   Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.xpath;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.util.Map;
+import java.util.TreeMap;
+
+/*import antlr.Token;
+import antlr.TokenStream;
+import antlr.TokenStreamException;
+import antlr.TokenStreamIOException;*/
+
+/**
+ * XPath 1.0 expression tokenizer.
+ * 
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class XPathTokenizer
+implements XPathParser.yyInput
+//implements TokenStream
+{
+
+  static class XPathToken
+  //extends Token
+  {
+
+    int type;
+    String val;
+
+    XPathToken (int type)
+    {
+      this (type, null);
+    }
+
+    XPathToken (int type, String val)
+    {
+      //super (type);
+      this.type = type;
+      this.val = val;
+    }
+
+    public String getText ()
+    {
+      return val;
+    }
+
+    public String toString ()
+    {
+      return val;
+    }
+    
+  }
+
+  static final Map keywords = new TreeMap ();
+  static
+  {
+    keywords.put ("ancestor", new Integer (XPathParser.ANCESTOR));
+    keywords.put ("ancestor-or-self", new Integer (XPathParser.ANCESTOR_OR_SELF));
+    keywords.put ("attribute", new Integer (XPathParser.ATTRIBUTE));
+    keywords.put ("child", new Integer (XPathParser.CHILD));
+    keywords.put ("descendant", new Integer (XPathParser.DESCENDANT));
+    keywords.put ("descendant-or-self", new Integer (XPathParser.DESCENDANT_OR_SELF));
+    keywords.put ("following", new Integer (XPathParser.FOLLOWING));
+    keywords.put ("following-sibling", new Integer (XPathParser.FOLLOWING_SIBLING));
+    keywords.put ("namespace", new Integer (XPathParser.NAMESPACE));
+    keywords.put ("parent", new Integer (XPathParser.PARENT));
+    keywords.put ("preceding", new Integer (XPathParser.PRECEDING));
+    keywords.put ("preceding-sibling", new Integer (XPathParser.PRECEDING_SIBLING));
+    keywords.put ("self", new Integer (XPathParser.SELF));
+    keywords.put ("div", new Integer (XPathParser.DIV));
+    keywords.put ("mod", new Integer (XPathParser.MOD));
+    keywords.put ("or", new Integer (XPathParser.OR));
+    keywords.put ("and", new Integer (XPathParser.AND));
+    keywords.put ("comment", new Integer (XPathParser.COMMENT));
+    keywords.put ("processing-instruction", new Integer (XPathParser.PROCESSING_INSTRUCTION));
+    keywords.put ("text", new Integer (XPathParser.TEXT));
+    keywords.put ("node", new Integer (XPathParser.NODE));
+  }
+
+  Reader in;
+  XPathToken token;
+  XPathToken lastToken;
+
+  public XPathTokenizer (String expr)
+  {
+    this (new StringReader (expr));
+  }
+
+  XPathTokenizer (Reader in)
+  {
+    this.in = in.markSupported () ? in : new BufferedReader (in);
+  }
+
+  /* Begin ANTLR specific *
+
+  public Token nextToken ()
+    throws TokenStreamException
+  {
+    try
+      {
+        if (!advance ())
+          {
+            throw new TokenStreamException ("eof");
+          }
+        token ();
+        return token;
+      }
+    catch (IOException e)
+      {
+        throw new TokenStreamIOException (e);
+      }
+  }
+  
+  * End ANTLR specific */
+
+  public boolean advance ()
+    throws IOException
+  {
+    lastToken = token;
+    int c = in.read ();
+    switch (c)
+      {
+      case -1: // eof
+        return false;
+      case 0x20:
+      case 0x09:
+      case 0x0d:
+      case 0x0a: // skip whitespace
+        return advance ();
+      case 0x22: // "
+      case 0x27: // '
+        token = consume_literal (c);
+        break;
+      case 0x28: // (
+        token = new XPathToken (XPathParser.LP);
+        break;
+      case 0x29: // )
+        token = new XPathToken (XPathParser.RP);
+        break;
+      case 0x5b: // [
+        token = new XPathToken (XPathParser.LB);
+        break;
+      case 0x5d: // ]
+        token = new XPathToken (XPathParser.RB);
+        break;
+      case 0x2c: // ,
+        token = new XPathToken (XPathParser.COMMA);
+        break;
+      case 0x7c: // |
+        token = new XPathToken (XPathParser.PIPE);
+        break;
+      case 0x2f: // /
+        in.mark (1);
+        int d1 = in.read ();
+        if (d1 == 0x2f)
+          {
+            token = new XPathToken (XPathParser.DOUBLE_SLASH);
+          }
+        else
+          {
+            in.reset ();
+            token = new XPathToken (XPathParser.SLASH);
+          }
+        break;
+      case 0x3d: // =
+        token = new XPathToken (XPathParser.EQ);
+        break;
+      case 0x21: // !
+        in.mark (1);
+        int d2 = in.read ();
+        if (d2 == 0x3d) // =
+          {
+            token = new XPathToken (XPathParser.NE);
+          }
+        else
+          {
+            in.reset ();
+            token = new XPathToken (XPathParser.yyErrorCode);
+          }
+        break;
+      case 0x3e: // >
+        in.mark (1);
+        int d3 = in.read ();
+        if (d3 == 0x3d) // =
+          {
+            token = new XPathToken (XPathParser.GTE);
+          }
+        else
+          {
+            in.reset ();
+            token = new XPathToken (XPathParser.GT);
+          }
+        break;
+      case 0x3c: // <
+        in.mark (1);
+        int d4 = in.read ();
+        if (d4 == 0x3d) // =
+          {
+            token = new XPathToken (XPathParser.LTE);
+          }
+        else
+          {
+            in.reset ();
+            token = new XPathToken (XPathParser.LT);
+          }
+        break;
+      case 0x2b: // +
+        token = new XPathToken (XPathParser.PLUS);
+        break;
+      case 0x2d: // -
+        token = new XPathToken (XPathParser.MINUS);
+        break;
+      case 0x40: // @
+        token = new XPathToken (XPathParser.AT);
+        break;
+      case 0x2a: // *
+        token = new XPathToken (XPathParser.STAR);
+        break;
+      case 0x24: // $
+        token = new XPathToken (XPathParser.DOLLAR);
+        break;
+      case 0x3a: // :
+        in.mark (1);
+        int d5 = in.read ();
+        if (d5 == 0x3a)
+          {
+            token = new XPathToken (XPathParser.DOUBLE_COLON);
+          }
+        else
+          {
+            in.reset ();
+            token = new XPathToken (XPathParser.COLON);
+          }
+        break;
+      case 0x2e: // .
+        in.mark (1);
+        int d6 = in.read ();
+        if (d6 == 0x2e)
+          {
+            token = new XPathToken (XPathParser.DOUBLE_DOT);
+          }
+        else
+          {
+            in.reset ();
+            token = new XPathToken (XPathParser.DOT);
+          }
+        break;
+      default:
+        if (c >= 0x30 && c <= 0x39)
+          {
+            token = consume_digits (c);
+          }
+        else if (c == 0x5f || Character.isLetter ((char) c))
+          {
+            token = consume_name (c);
+          }
+        else
+          {
+            token = new XPathToken (XPathParser.yyErrorCode);
+          }
+      }
+    return true;
+  }
+
+  public int token ()
+  {
+    return token.type;
+  }
+
+  public Object value ()
+  {
+    return token.val;
+  }
+
+  XPathToken consume_literal (int delimiter)
+    throws IOException
+  {
+    StringBuffer buf = new StringBuffer ();
+    while (true)
+      {
+        int c = in.read ();
+        if (c == -1)
+          {
+            return new XPathToken (XPathParser.yyErrorCode);
+          }
+        else if (c == delimiter)
+          {
+            return new XPathToken (XPathParser.LITERAL, buf.toString ());
+          }
+        else
+          {
+            buf.append ((char) c);
+          }
+      }
+  }
+
+  XPathToken consume_digits (int c)
+    throws IOException
+  {
+    StringBuffer buf = new StringBuffer ();
+    buf.append ((char) c);
+    while (true)
+      {
+        in.mark (1);
+        c = in.read ();
+        if (c >= 0x30 && c <= 0x39)
+          {
+            buf.append ((char) c);
+          }
+        else
+          {
+            in.reset ();
+            return new XPathToken (XPathParser.DIGITS, buf.toString ());
+          }
+      }
+  }
+
+  XPathToken consume_name (int c)
+    throws IOException
+  {
+    StringBuffer buf = new StringBuffer ();
+    buf.append ((char) c);
+    while (true)
+      {
+        in.mark (1);
+        c = in.read ();
+        if (isNameChar (c))
+          {
+            buf.append ((char) c);
+          }
+        else
+          {
+            in.reset ();
+            String name = buf.toString ();
+            Integer keyword = (Integer) keywords.get (name);
+            if (keyword == null)
+              {
+                return new XPathToken (XPathParser.NAME, name);
+              }
+            else
+              {
+                int val = keyword.intValue ();
+                switch (val)
+                  {
+                  case XPathParser.NODE:
+                  case XPathParser.COMMENT:
+                  case XPathParser.TEXT:
+                  case XPathParser.PROCESSING_INSTRUCTION:
+                    // Consume subsequent (
+                    in.mark (1);
+                    do
+                      {
+                        c = in.read ();
+                      }
+                    while (c == 0x20 || c == 0x09);
+                    if (c != 0x28)
+                      {
+                        in.reset ();
+                        return new XPathToken (XPathParser.NAME, name);
+                      }
+                    break;
+                  case XPathParser.CHILD:
+                  case XPathParser.PARENT:
+                  case XPathParser.SELF:
+                  case XPathParser.DESCENDANT:
+                  case XPathParser.ANCESTOR:
+                  case XPathParser.DESCENDANT_OR_SELF:
+                  case XPathParser.ANCESTOR_OR_SELF:
+                  case XPathParser.ATTRIBUTE:
+                  case XPathParser.NAMESPACE:
+                  case XPathParser.FOLLOWING:
+                  case XPathParser.FOLLOWING_SIBLING:
+                  case XPathParser.PRECEDING:
+                  case XPathParser.PRECEDING_SIBLING:
+                    // Check that this is an axis specifier
+                    in.mark(1);
+                    do
+                      {
+                        c = in.read();
+                      }
+                    while (c == 0x20 || c == 0x09);
+                    if (c == 0x3a)
+                      {
+                        c = in.read();
+                        if (c == 0x3a)
+                          {
+                            in.reset();
+                            return new XPathToken(val);
+                          }
+                      }
+                    in.reset();
+                    return new XPathToken(XPathParser.NAME, name);
+                  case XPathParser.DIV:
+                  case XPathParser.MOD:
+                    // May be a name
+                    if (lastToken == null)
+                      {
+                        return new XPathToken(XPathParser.NAME, name);
+                      }
+                    switch (lastToken.type)
+                      {
+                      case XPathParser.LP:
+                      case XPathParser.LB:
+                      case XPathParser.COMMA:
+                      case XPathParser.PIPE:
+                      case XPathParser.EQ:
+                      case XPathParser.NE:
+                      case XPathParser.GT:
+                      case XPathParser.LT:
+                      case XPathParser.GTE:
+                      case XPathParser.LTE:
+                      case XPathParser.PLUS:
+                      case XPathParser.MINUS:
+                      case XPathParser.STAR:
+                      case XPathParser.AT:
+                      case XPathParser.DOLLAR:
+                      case XPathParser.COLON:
+                      case XPathParser.DOUBLE_COLON:
+                      case XPathParser.DIV:
+                      case XPathParser.MOD:
+                      case XPathParser.OR:
+                      case XPathParser.AND:
+                      case XPathParser.SLASH:
+                        return new XPathToken(XPathParser.NAME, name);
+                      }
+                    break;
+                  }
+                return new XPathToken (val);
+              }
+          }
+      }
+  }
+
+  boolean isNameChar (int c)
+  {
+    /* Name */
+    return (c == 0x5f
+            || c == 0x2d
+            || c == 0x2e
+            || (c >= 0x30 && c <= 0x39)
+            /* CombiningChar */
+            || (c >= 0x0300 && c <= 0x0345)
+            || (c >= 0x0360 && c <= 0x0361)
+            || (c >= 0x0483 && c <= 0x0486)
+            || (c >= 0x0591 && c <= 0x05A1)
+            || (c >= 0x05A3 && c <= 0x05B9)
+            || (c >= 0x05BB && c <= 0x05BD)
+            || c == 0x05BF
+            || (c >= 0x05C1 && c <= 0x05C2)
+            || c == 0x05C4
+            || (c >= 0x064B && c <= 0x0652)
+            || c == 0x0670
+            || (c >= 0x06D6 && c <= 0x06DC)
+            || (c >= 0x06DD && c <= 0x06DF)
+            || (c >= 0x06E0 && c <= 0x06E4)
+            || (c >= 0x06E7 && c <= 0x06E8)
+            || (c >= 0x06EA && c <= 0x06ED)
+            || (c >= 0x0901 && c <= 0x0903)
+            || c == 0x093C
+            || (c >= 0x093E && c <= 0x094C)
+            || c == 0x094D
+            || (c >= 0x0951 && c <= 0x0954)
+            || (c >= 0x0962 && c <= 0x0963)
+            || (c >= 0x0981 && c <= 0x0983)
+            || c == 0x09BC
+            || c == 0x09BE
+            || c == 0x09BF
+            || (c >= 0x09C0 && c <= 0x09C4)
+            || (c >= 0x09C7 && c <= 0x09C8)
+            || (c >= 0x09CB && c <= 0x09CD)
+            || c == 0x09D7
+            || (c >= 0x09E2 && c <= 0x09E3)
+            || c == 0x0A02
+            || c == 0x0A3C
+            || c == 0x0A3E
+            || c == 0x0A3F
+            || (c >= 0x0A40 && c <= 0x0A42)
+            || (c >= 0x0A47 && c <= 0x0A48)
+            || (c >= 0x0A4B && c <= 0x0A4D)
+            || (c >= 0x0A70 && c <= 0x0A71)
+            || (c >= 0x0A81 && c <= 0x0A83)
+            || c == 0x0ABC
+            || (c >= 0x0ABE && c <= 0x0AC5)
+            || (c >= 0x0AC7 && c <= 0x0AC9)
+            || (c >= 0x0ACB && c <= 0x0ACD)
+            || (c >= 0x0B01 && c <= 0x0B03)
+            || c == 0x0B3C
+            || (c >= 0x0B3E && c <= 0x0B43)
+            || (c >= 0x0B47 && c <= 0x0B48)
+            || (c >= 0x0B4B && c <= 0x0B4D)
+            || (c >= 0x0B56 && c <= 0x0B57)
+            || (c >= 0x0B82 && c <= 0x0B83)
+            || (c >= 0x0BBE && c <= 0x0BC2)
+            || (c >= 0x0BC6 && c <= 0x0BC8)
+            || (c >= 0x0BCA && c <= 0x0BCD)
+            || c == 0x0BD7
+            || (c >= 0x0C01 && c <= 0x0C03)
+            || (c >= 0x0C3E && c <= 0x0C44)
+            || (c >= 0x0C46 && c <= 0x0C48)
+            || (c >= 0x0C4A && c <= 0x0C4D)
+            || (c >= 0x0C55 && c <= 0x0C56)
+            || (c >= 0x0C82 && c <= 0x0C83)
+            || (c >= 0x0CBE && c <= 0x0CC4)
+            || (c >= 0x0CC6 && c <= 0x0CC8)
+            || (c >= 0x0CCA && c <= 0x0CCD)
+            || (c >= 0x0CD5 && c <= 0x0CD6)
+            || (c >= 0x0D02 && c <= 0x0D03)
+            || (c >= 0x0D3E && c <= 0x0D43)
+            || (c >= 0x0D46 && c <= 0x0D48)
+            || (c >= 0x0D4A && c <= 0x0D4D)
+            || c == 0x0D57
+            || c == 0x0E31
+            || (c >= 0x0E34 && c <= 0x0E3A)
+            || (c >= 0x0E47 && c <= 0x0E4E)
+            || c == 0x0EB1
+            || (c >= 0x0EB4 && c <= 0x0EB9)
+            || (c >= 0x0EBB && c <= 0x0EBC)
+            || (c >= 0x0EC8 && c <= 0x0ECD)
+            || (c >= 0x0F18 && c <= 0x0F19)
+            || c == 0x0F35
+            || c == 0x0F37
+            || c == 0x0F39
+            || c == 0x0F3E
+            || c == 0x0F3F
+            || (c >= 0x0F71 && c <= 0x0F84)
+            || (c >= 0x0F86 && c <= 0x0F8B)
+            || (c >= 0x0F90 && c <= 0x0F95)
+            || c == 0x0F97
+            || (c >= 0x0F99 && c <= 0x0FAD)
+            || (c >= 0x0FB1 && c <= 0x0FB7)
+            || c == 0x0FB9
+            || (c >= 0x20D0 && c <= 0x20DC)
+            || c == 0x20E1
+            || (c >= 0x302A && c <= 0x302F)
+            || c == 0x3099
+            || c == 0x309A
+            /* Extender */
+            || c == 0x00B7
+            || c == 0x02D0
+            || c == 0x02D1
+            || c == 0x0387
+            || c == 0x0640
+            || c == 0x0E46
+            || c == 0x0EC6
+            || c == 0x3005
+            || (c >= 0x3031 && c <= 0x3035)
+            || (c >= 0x309D && c <= 0x309E)
+            || (c >= 0x30FC && c <= 0x30FE)
+            /* Name */
+            || Character.isLetter ((char) c));
+  }
+
+}