/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package java.beans;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Vector;
import org.apache.harmony.beans.Handler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
public class XMLDecoder {
private InputStream is = null;
private Object owner = null;
private ExceptionListener exceptionListener = null;
private final Vector<Object> objects = new Vector<Object>();
private Iterator<Object> iterator = null;
private ClassLoader classLoader = null;
public XMLDecoder(InputStream is, Object owner,
ExceptionListener exceptionListener, ClassLoader cl) {
this.is = is;
this.owner = owner;
this.exceptionListener = exceptionListener;
this.classLoader = cl;
}
public XMLDecoder(InputStream is, Object owner,
ExceptionListener exceptionListener) {
this.is = is;
this.owner = owner;
this.exceptionListener = exceptionListener;
}
public XMLDecoder(InputStream is, Object owner) {
this.is = is;
this.owner = owner;
}
public XMLDecoder(InputStream is) {
this.is = is;
}
public void setOwner(Object owner) {
this.owner = owner;
}
public Object readObject() {
try {
if (iterator == null) {
initialize();
}
return iterator.next();
} catch (NoSuchElementException nsee) {
throw new ArrayIndexOutOfBoundsException();
}
}
public Object getOwner() {
return owner;
}
public void setExceptionListener(ExceptionListener exceptionListener) {
this.exceptionListener = exceptionListener;
}
public ExceptionListener getExceptionListener() {
return exceptionListener;
}
public void close() {
try {
is.close();
} catch (IOException ioe) {
handleException(ioe);
}
}
private void handleException(Exception e) {
if (exceptionListener != null) {
exceptionListener.exceptionThrown(e);
}
}
private void initialize() {
ClassLoader oldCL = null;
try {
String saxParserClassName = System
.getProperty("org.xml.sax.driver"); //$NON-NLS-1$
if (saxParserClassName == null) {
saxParserClassName = "org.apache.xerces.parsers.SAXParser"; //$NON-NLS-1$
}
XMLReader xmlReader = XMLReaderFactory
.createXMLReader(saxParserClassName);
xmlReader.setContentHandler(new Handler(this, objects));
if (classLoader != null) {
oldCL = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(classLoader);
}
xmlReader.parse(new InputSource(is));
if (classLoader != null) {
Thread.currentThread().setContextClassLoader(oldCL);
}
} catch (SAXException saxe) {
saxe.printStackTrace();
handleException(saxe);
} catch (IOException ioe) {
ioe.printStackTrace();
handleException(ioe);
} finally {
iterator = objects.iterator();
}
}
}