    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    }