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Java > Open Source Codes > org > jfree > xml > writer > coretypes > RenderingHintsWriteHandler


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  * RenderingHintsHandler.java
29  * --------------------------
30  * (C)opyright 2003-2005, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: RenderingHintsWriteHandler.java,v 1.5 2005/10/18 13:35:21 mungady Exp $
36  *
37  * Changes
38  * -------------------------
39  * 22.11.2003 : Initial version
40  *
41  */

42
43 package org.jfree.xml.writer.coretypes;
44
45 import java.awt.RenderingHints JavaDoc;
46 import java.io.IOException JavaDoc;
47 import java.lang.reflect.Field JavaDoc;
48 import java.lang.reflect.Modifier JavaDoc;
49 import java.util.Iterator JavaDoc;
50
51 import org.jfree.util.Log;
52 import org.jfree.xml.writer.AbstractXmlWriteHandler;
53 import org.jfree.xml.writer.AttributeList;
54 import org.jfree.xml.writer.XMLWriter;
55 import org.jfree.xml.writer.XMLWriterException;
56 import org.jfree.xml.writer.XMLWriterSupport;
57
58 /**
59  * A handler for writing a {@link RenderingHints} object.
60  */

61 public class RenderingHintsWriteHandler extends AbstractXmlWriteHandler {
62
63     /**
64      * Default constructor.
65      */

66     public RenderingHintsWriteHandler() {
67         super();
68     }
69
70     /**
71      * Performs the writing of a single object.
72      *
73      * @param tagName the tag name.
74      * @param object the object.
75      * @param writer the writer.
76      * @param mPlexAttribute ??.
77      * @param mPlexValue ??.
78      *
79      * @throws IOException if there is an I/O error.
80      * @throws XMLWriterException if there is a writer problem.
81      */

82     public void write(final String JavaDoc tagName, final Object JavaDoc object, final XMLWriter writer,
83                       final String JavaDoc mPlexAttribute, final String JavaDoc mPlexValue)
84         throws IOException JavaDoc, XMLWriterException {
85
86         writer.writeTag(tagName, mPlexAttribute, mPlexValue, XMLWriterSupport.OPEN);
87         writer.allowLineBreak();
88         final RenderingHints JavaDoc hints = (RenderingHints JavaDoc) object;
89         final Iterator JavaDoc it = hints.keySet().iterator();
90         while (it.hasNext()) {
91             final RenderingHints.Key JavaDoc key = (RenderingHints.Key JavaDoc) it.next();
92             final String JavaDoc keyname = hintFieldToString(key);
93             final String JavaDoc value = hintFieldToString(hints.get(key));
94             final AttributeList attribs = new AttributeList();
95             attribs.setAttribute("key", keyname);
96             attribs.setAttribute("value", value);
97             writer.writeTag("entry", attribs, XMLWriterSupport.CLOSE);
98             writer.allowLineBreak();
99         }
100         writer.writeCloseTag(tagName);
101         writer.allowLineBreak();
102     }
103
104     private String JavaDoc hintFieldToString(final Object JavaDoc o) {
105         final Field JavaDoc[] fields = RenderingHints JavaDoc.class.getFields();
106         for (int i = 0; i < fields.length; i++) {
107             final Field JavaDoc f = fields[i];
108             if (Modifier.isFinal(f.getModifiers())
109                 && Modifier.isPublic(f.getModifiers())
110                 && Modifier.isStatic(f.getModifiers())) {
111                 try {
112                     final Object JavaDoc value = f.get(null);
113                     if (o.equals(value)) {
114                         return f.getName();
115                     }
116                 }
117                 catch (Exception JavaDoc e) {
118                     Log.info ("Unable to write RenderingHint", e);
119                 }
120             }
121         }
122         throw new IllegalArgumentException JavaDoc("Invalid value given");
123     }
124
125 }
126
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