Imported GNU Classpath 0.20
Imported GNU Classpath 0.20
* Makefile.am (AM_CPPFLAGS): Add classpath/include.
* java/nio/charset/spi/CharsetProvider.java: New override file.
* java/security/Security.java: Likewise.
* sources.am: Regenerated.
* Makefile.in: Likewise.
From-SVN: r109831
This commit is contained in:
Mark Wielaard
@@ -0,0 +1,265 @@
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/* XMLEncoder.java
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Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.beans;
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import gnu.java.beans.encoder.ScanEngine;
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import java.io.OutputStream;
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/**
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* This class uses the {@link PersistenceDelegate} and {@link Encoder}
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* infrastructure to generate an XML representation of the objects it
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* serializes.
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*
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* @author Robert Schuster (robertschuster@fsfe.org)
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* @since 1.4
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*/
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public class XMLEncoder extends Encoder
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{
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Object owner;
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Exception exception;
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ScanEngine scanEngine;
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private int accessCounter = 0;
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public XMLEncoder(OutputStream os)
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{
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scanEngine = new ScanEngine(os);
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}
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public void close()
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{
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if (scanEngine != null)
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{
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scanEngine.close();
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scanEngine = null;
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}
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}
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public void flush()
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{
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scanEngine.flush();
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}
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public void writeExpression(Expression expr)
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{
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// Implementation note: Why is this method overwritten and nearly exactly
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// reimplemented as in Encoder?
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// The Encoder class can (and should be) subclassed by users outside of the
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// java.beans package. While I have doubts that this is possible from an
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// API design point of view I tried to replicate the Encoder's behavior
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// in the JDK as exactly as possible. This strictness however made it
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// extremely complicated to implement the XMLEncoder's backend. Therefore
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// I decided to copy the Encoder's implementation and make all changes
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// I needed for a succesfull operation of XMLEncoder.
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//
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// The same is true for the writeStatement method.
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// Silently ignore out of bounds calls.
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if (accessCounter <= 0)
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return;
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scanEngine.writeExpression(expr);
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Object target = expr.getTarget();
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Object value = null;
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Object newValue = null;
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try
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{
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value = expr.getValue();
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}
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catch (Exception e)
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{
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getExceptionListener().exceptionThrown(e);
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return;
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}
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newValue = get(value);
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if (newValue == null)
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{
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Object newTarget = get(target);
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if (newTarget == null)
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{
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writeObject(target);
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newTarget = get(target);
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// May happen if exception was thrown.
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if (newTarget == null)
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{
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return;
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}
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}
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Object[] args = expr.getArguments();
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Object[] newArgs = new Object[args.length];
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for (int i = 0; i < args.length; i++)
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{
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newArgs[i] = get(args[i]);
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if (newArgs[i] == null || isImmutableType(args[i].getClass()))
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{
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writeObject(args[i]);
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newArgs[i] = get(args[i]);
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}
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}
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Expression newExpr = new Expression(newTarget, expr.getMethodName(),
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newArgs);
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// Fakes the result of Class.forName(<primitiveType>) to make it possible
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// to hand such a type to the encoding process.
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if (value instanceof Class && ((Class) value).isPrimitive())
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newExpr.setValue(value);
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// Instantiates the new object.
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try
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{
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newValue = newExpr.getValue();
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putCandidate(value, newValue);
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}
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catch (Exception e)
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{
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getExceptionListener().exceptionThrown(e);
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// In Statement.writeExpression we had no possibility to flags
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// an erroneous state to the ScanEngine without behaving different
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// to the JDK.
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scanEngine.revoke();
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}
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writeObject(value);
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}
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else if(value.getClass() == String.class || value.getClass() == Class.class)
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{
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writeObject(value);
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}
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scanEngine.end();
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}
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public void writeStatement(Statement stmt)
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{
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// In case of questions have a at the implementation note in
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// writeExpression.
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scanEngine.writeStatement(stmt);
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// Silently ignore out of bounds calls.
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if (accessCounter <= 0)
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return;
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Object target = stmt.getTarget();
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Object newTarget = get(target);
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if (newTarget == null)
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{
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writeObject(target);
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newTarget = get(target);
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}
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Object[] args = stmt.getArguments();
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Object[] newArgs = new Object[args.length];
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for (int i = 0; i < args.length; i++)
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{
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// Here is the difference to the original writeStatement
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// method in Encoder. In case that the object is known or
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// not an immutable we put it directly into the ScanEngine
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// which will then generate an object reference for it.
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newArgs[i] = get(args[i]);
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if (newArgs[i] == null || isImmutableType(args[i].getClass()))
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{
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writeObject(args[i]);
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newArgs[i] = get(args[i]);
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}
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else
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scanEngine.writeObject(args[i]);
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}
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Statement newStmt = new Statement(newTarget, stmt.getMethodName(), newArgs);
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try
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{
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newStmt.execute();
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}
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catch (Exception e)
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{
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getExceptionListener().exceptionThrown(e);
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// In Statement.writeStatement we had no possibility to flags
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// an erroneous state to the ScanEngine without behaving different
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// to the JDK.
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scanEngine.revoke();
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return;
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}
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scanEngine.end();
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}
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public void writeObject(Object o)
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{
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accessCounter++;
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scanEngine.writeObject(o);
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if (get(o) == null);
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super.writeObject(o);
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accessCounter--;
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}
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public void setOwner(Object o)
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{
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owner = o;
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}
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public Object getOwner()
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{
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return owner;
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}
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}
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