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Java > Open Source Codes > org > jfree > xml > parser > coretypes > ColorReadHandler


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  * ColorReadHandler
29  * ----------------
30  * (C) Copyright 2003, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: ColorReadHandler.java,v 1.2 2005/10/18 13:33:32 mungady Exp $
36  *
37  * Changes (from 25-Nov-2003)
38  * --------------------------
39  * 25-Nov-2003 : Added standard header and Javadocs (DG);
40  *
41  */
42
43 package org.jfree.xml.parser.coretypes;
44
45 import java.awt.Color JavaDoc;
46
47 import org.jfree.xml.parser.AbstractXmlReadHandler;
48 import org.xml.sax.Attributes JavaDoc;
49 import org.xml.sax.SAXException JavaDoc;
50
51 /**
52  * A SAX handler for reading {@link Color} objects from an XML element.
53  */
54 public class ColorReadHandler extends AbstractXmlReadHandler {
55
56     /** The color under construction. */
57     private Color JavaDoc color;
58     
59     /**
60      * Creates a new handler.
61      */
62     public ColorReadHandler() {
63         super();
64     }
65
66     /**
67      * Called at the start of parsing a {@link Color} element, this method reads the attributes and
68      * constructs the {@link Color}.
69      *
70      * @param attrs the attributes.
71      *
72      * @throws SAXException to indicate a parsing error.
73      */
74     protected void startParsing(final Attributes JavaDoc attrs) throws SAXException JavaDoc {
75         final String JavaDoc encodedValue = attrs.getValue("value");
76         this.color = Color.decode(encodedValue);
77         if (attrs.getValue("alpha") != null) {
78             this.color = new Color JavaDoc(this.color.getRed(), this.color.getGreen(),
79                                    this.color.getBlue(),
80                                    Integer.parseInt(attrs.getValue("alpha")));
81         }
82     }
83
84     /**
85      * Returns the color under construction.
86      *
87      * @return the color.
88      */
89     public Object JavaDoc getObject() {
90         return this.color;
91     }
92     
93 }
94
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