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 * RenderingHintsReadHandler.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: RenderingHintsReadHandler.java,v 1.3 2005/10/18 13:33:32 mungady Exp $
036 *
037 * Changes
038 * -------
039 * 03-Dec-2003 : Initial version
040 * 11-Feb-2004 : Added missing Javadocs (DG);
041 * 
042 */
043
044package org.jfree.xml.parser.coretypes;
045
046import java.awt.RenderingHints;
047import java.util.ArrayList;
048
049import org.jfree.xml.parser.AbstractXmlReadHandler;
050import org.jfree.xml.parser.XmlReadHandler;
051import org.jfree.xml.parser.XmlReaderException;
052import org.xml.sax.Attributes;
053import org.xml.sax.SAXException;
054
055/**
056 * A read handler that can parse the XML element for a {@link RenderingHints} collection.
057 */
058public class RenderingHintsReadHandler extends AbstractXmlReadHandler {
059
060    /** The subhandlers. */
061    private ArrayList handlers;
062    
063    /** The rendering hints under construction. */
064    private RenderingHints renderingHints;
065
066    /**
067     * Creates a new read handler.
068     */
069    public RenderingHintsReadHandler() {
070        super();
071    }
072
073    /**
074     * Starts parsing.
075     *
076     * @param attrs  the attributes.
077     *
078     * @throws SAXException never.
079     */
080    protected void startParsing(final Attributes attrs) throws SAXException {
081        this.handlers = new ArrayList();
082    }
083
084    /**
085     * Returns the handler for a child element.
086     *
087     * @param tagName  the tag name.
088     * @param atts  the attributes.
089     *
090     * @return the handler.
091     *
092     * @throws SAXException  if there is a parsing error.
093     * @throws XmlReaderException if there is a reader error.
094     */
095    protected XmlReadHandler getHandlerForChild(final String tagName, final Attributes atts)
096        throws XmlReaderException, SAXException {
097
098        if (!tagName.equals("entry")) {
099            throw new SAXException("Expected 'entry' tag.");
100        }
101
102        final XmlReadHandler handler = new RenderingHintValueReadHandler();
103        this.handlers.add(handler);
104        return handler;
105    }
106
107    /**
108     * Done parsing.
109     *
110     * @throws SAXException if there is a parsing error.
111     * @throws XmlReaderException if there is a reader error.
112     */
113    protected void doneParsing() throws SAXException, XmlReaderException {
114        this.renderingHints = new RenderingHints(null);
115
116        for (int i = 0; i < this.handlers.size(); i++) {
117            final RenderingHintValueReadHandler rh =
118                (RenderingHintValueReadHandler) this.handlers.get(i);
119            this.renderingHints.put(rh.getKey(), rh.getValue());
120        }
121    }
122
123    /**
124     * Returns the object for this element.
125     *
126     * @return the object.
127     *
128     * @throws XmlReaderException if there is a parsing error.
129     */
130    public Object getObject() throws XmlReaderException {
131        return this.renderingHints;
132    }
133}