001 /* ========================================================================
002 * JCommon : a free general purpose class library for the Java(tm) platform
003 * ========================================================================
004 *
005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jcommon/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * ----------------------
028 * Base64ReadHandler.java
029 * ----------------------
030 * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
031 *
032 * Original Author: Thomas Morgner;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: Base64ReadHandler.java,v 1.4 2005/11/08 14:16:51 mungady Exp $
036 *
037 * Changes
038 * -------
039 * 11-Feb-2004 : Added standard header and Javadocs (DG);
040 *
041 */
042
043 package org.jfree.xml.parser;
044
045 import java.io.ByteArrayInputStream;
046 import java.io.IOException;
047 import java.io.ObjectInputStream;
048
049 import org.jfree.xml.util.Base64;
050 import org.xml.sax.SAXException;
051
052 /**
053 * A read handler for Base64 encoded elements.
054 *
055 * @deprecated base64 encoded elements are no longer supported ...
056 */
057 public class Base64ReadHandler extends AbstractXmlReadHandler {
058
059 /** The encoded object. */
060 private String encodedObject;
061
062 /**
063 * Creates a new handler.
064 */
065 public Base64ReadHandler() {
066 super();
067 }
068
069 /**
070 * Process character data.
071 *
072 * @param ch the character buffer.
073 * @param start the start index.
074 * @param length the number of characters.
075 *
076 * @throws SAXException ???.
077 */
078 public void characters(final char[] ch, final int start, final int length)
079 throws SAXException {
080 this.encodedObject = new String(ch, start, length);
081 }
082
083 /**
084 * Returns the object under construction.
085 *
086 * @return the object
087 *
088 * @throws XmlReaderException ???.
089 */
090 public Object getObject() throws XmlReaderException {
091 try {
092 final byte[] bytes = Base64.decode(this.encodedObject.toCharArray());
093 final ObjectInputStream in =
094 new ObjectInputStream(new ByteArrayInputStream(bytes));
095 return in.readObject();
096 }
097 catch (IOException e) {
098 throw new XmlReaderException("Can't read class for <" + getTagName() + ">", e);
099 }
100 catch (ClassNotFoundException e) {
101 throw new XmlReaderException("Class not found for <" + getTagName() + ">", e);
102 }
103 }
104 }