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Java > Open Source Codes > org > jfree > xml > parser > Base64ReadHandler


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ----------------------
28  * Base64ReadHandler.java
29  * ----------------------
30  * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: Base64ReadHandler.java,v 1.4 2005/11/08 14:16:51 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 11-Feb-2004 : Added standard header and Javadocs (DG);
40  *
41  */
42
43 package org.jfree.xml.parser;
44
45 import java.io.ByteArrayInputStream JavaDoc;
46 import java.io.IOException JavaDoc;
47 import java.io.ObjectInputStream JavaDoc;
48
49 import org.jfree.xml.util.Base64;
50 import org.xml.sax.SAXException JavaDoc;
51
52 /**
53  * A read handler for Base64 encoded elements.
54  *
55  * @deprecated base64 encoded elements are no longer supported ...
56  */
57 public class Base64ReadHandler extends AbstractXmlReadHandler {
58     
59     /** The encoded object. */
60     private String JavaDoc encodedObject;
61     
62     /**
63      * Creates a new handler.
64      */
65     public Base64ReadHandler() {
66         super();
67     }
68
69     /**
70      * Process character data.
71      *
72      * @param ch the character buffer.
73      * @param start the start index.
74      * @param length the number of characters.
75      *
76      * @throws SAXException ???.
77      */
78     public void characters(final char[] ch, final int start, final int length)
79         throws SAXException JavaDoc {
80         this.encodedObject = new String JavaDoc(ch, start, length);
81     }
82
83     /**
84      * Returns the object under construction.
85      *
86      * @return the object
87      *
88      * @throws XmlReaderException ???.
89      */
90     public Object JavaDoc getObject() throws XmlReaderException {
91         try {
92             final byte[] bytes = Base64.decode(this.encodedObject.toCharArray());
93             final ObjectInputStream JavaDoc in =
94                 new ObjectInputStream JavaDoc(new ByteArrayInputStream JavaDoc(bytes));
95             return in.readObject();
96         }
97         catch (IOException JavaDoc e) {
98             throw new XmlReaderException("Can't read class for <" + getTagName() + ">", e);
99         }
100         catch (ClassNotFoundException JavaDoc e) {
101             throw new XmlReaderException("Class not found for <" + getTagName() + ">", e);
102         }
103     }
104 }
105
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