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 * ColorReadHandler
029 * ----------------
030 * (C) Copyright 2003, by Thomas Morgner and Contributors.
031 *
032 * Original Author:  Thomas Morgner;
033 * Contributor(s):   David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: ColorReadHandler.java,v 1.2 2005/10/18 13:33:32 mungady Exp $
036 *
037 * Changes (from 25-Nov-2003)
038 * --------------------------
039 * 25-Nov-2003 : Added standard header and Javadocs (DG);
040 *
041 */
042
043package org.jfree.xml.parser.coretypes;
044
045import java.awt.Color;
046
047import org.jfree.xml.parser.AbstractXmlReadHandler;
048import org.xml.sax.Attributes;
049import org.xml.sax.SAXException;
050
051/**
052 * A SAX handler for reading {@link Color} objects from an XML element.
053 */
054public class ColorReadHandler extends AbstractXmlReadHandler  {
055
056    /** The color under construction. */
057    private Color color;
058    
059    /**
060     * Creates a new handler.
061     */
062    public ColorReadHandler() {
063        super();
064    }
065
066    /**
067     * Called at the start of parsing a {@link Color} element, this method reads the attributes and
068     * constructs the {@link Color}. 
069     * 
070     * @param attrs  the attributes.
071     * 
072     * @throws SAXException to indicate a parsing error.
073     */
074    protected void startParsing(final Attributes attrs) throws SAXException {
075        final String encodedValue = attrs.getValue("value");
076        this.color = Color.decode(encodedValue);
077        if (attrs.getValue("alpha") != null) {
078            this.color = new Color(this.color.getRed(), this.color.getGreen(),
079                                   this.color.getBlue(), 
080                                   Integer.parseInt(attrs.getValue("alpha")));
081        }
082    }
083
084    /**
085     * Returns the color under construction.
086     * 
087     * @return the color.
088     */
089    public Object getObject() {
090        return this.color;
091    }
092    
093}