Initial revision

From-SVN: r104578
2005-09-23 19:36:46 +00:00
parent acff2da93c
commit 9b044d1951
495 changed files with 82760 additions and 0 deletions
@@ -0,0 +1,135 @@
+/* gnuValueHolder.java --
+   Copyright (C) 2005 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.CORBA;
+
+import gnu.CORBA.CDR.Vio;
+
+import org.omg.CORBA.TypeCode;
+import org.omg.CORBA.ValueBaseHolder;
+import org.omg.CORBA.portable.BoxedValueHelper;
+import org.omg.CORBA.portable.InputStream;
+import org.omg.CORBA.portable.OutputStream;
+
+import java.io.Serializable;
+
+/**
+ * Boxed value holder that also remembers the value type and the value helper.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public class gnuValueHolder
+  extends ValueBaseHolder
+{
+  /**
+   * The type code of the stored value.
+   */
+  TypeCode type;
+
+  /**
+   * The helper that could read and write fields of the boxed value.
+   */
+  transient BoxedValueHelper helper;
+
+  /**
+   * If true, the helper not available.
+   */
+  transient boolean helper_NA;
+
+  /**
+   * Create a new instance for the given value and given type.
+   */
+  public gnuValueHolder(Serializable value, TypeCode a_type)
+  {
+    super(value);
+    type = a_type;
+  }
+
+  /**
+   * Get the true type, as it was passed in the constructor.
+   */
+  public TypeCode _type()
+  {
+    return type;
+  }
+
+  /**
+   * Write content to the output stream. Tries to locate the
+   * corresponding helper class.
+   */
+  public void _write(OutputStream output)
+  {
+    findHelper();
+    if (helper == null)
+      super._write(output);
+    else
+      Vio.write(output, value, helper);
+  }
+
+  /**
+   * Read, trying to locate helper, if possible.
+   */
+  public void _read(InputStream input)
+  {
+    findHelper();
+    if (helper == null)
+      super._read(input);
+    else
+      value = Vio.read(input, helper);
+  }
+
+  /**
+   * Set the read and write methods.
+   */
+  void findHelper()
+  {
+    if (helper != null || helper_NA)
+      return;
+    try
+      {
+        Class helperClass =
+          Class.forName(ObjectCreator.toHelperName(type.id()));
+
+        helper = (BoxedValueHelper) helperClass.newInstance();
+      }
+    catch (Exception ex)
+      {
+        helper_NA = true;
+      }
+  }
+}