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


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  * RenderingHintValueReadHandler.java
29  * ----------------------------------
30  * (C)opyright 2003, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: RenderingHintValueReadHandler.java,v 1.3 2005/10/18 13:33:32 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 03-Dec-2003 : Initial version
40  * 11-Feb-2004 : Added missing Javadocs (DG);
41  *
42  */
43
44 package org.jfree.xml.parser.coretypes;
45
46 import java.awt.RenderingHints JavaDoc;
47 import java.lang.reflect.Field JavaDoc;
48 import java.lang.reflect.Modifier JavaDoc;
49
50 import org.jfree.util.Log;
51 import org.jfree.xml.parser.AbstractXmlReadHandler;
52 import org.jfree.xml.parser.XmlReaderException;
53 import org.xml.sax.Attributes JavaDoc;
54 import org.xml.sax.SAXException JavaDoc;
55
56 /**
57  * A read handler for a rendering hint value.
58  */
59 public class RenderingHintValueReadHandler extends AbstractXmlReadHandler {
60
61     /** The key under construction. */
62     private Object JavaDoc key;
63     
64     /** The value under construction. */
65     private Object JavaDoc value;
66
67     /**
68      * Creates a new read handler.
69      */
70     public RenderingHintValueReadHandler() {
71         super();
72     }
73
74     /**
75      * Starts parsing.
76      *
77      * @param attrs the attributes.
78      *
79      * @throws SAXException if there is a parsing error.
80      */
81     protected void startParsing(final Attributes JavaDoc attrs) throws SAXException JavaDoc {
82         final String JavaDoc keyText = attrs.getValue("key");
83         final String JavaDoc valueText = attrs.getValue("value");
84         this.key = stringToHintField(keyText);
85         this.value = stringToHintField(valueText);
86     }
87
88     private Object JavaDoc stringToHintField (final String JavaDoc name) {
89         final Field JavaDoc[] fields = RenderingHints JavaDoc.class.getFields();
90         for (int i = 0; i < fields.length; i++) {
91             final Field JavaDoc f = fields[i];
92             if (Modifier.isFinal(f.getModifiers())
93                 && Modifier.isPublic(f.getModifiers())
94                 && Modifier.isStatic(f.getModifiers())) {
95                 try {
96                     final String JavaDoc fieldName = f.getName();
97                     if (fieldName.equals(name)) {
98                         return f.get(null);
99                     }
100                 }
101                 catch (Exception JavaDoc e) {
102                     Log.info ("Unable to write RenderingHint", e);
103                 }
104             }
105         }
106         throw new IllegalArgumentException JavaDoc("Invalid value given");
107     }
108
109     /**
110      * Returns the object for this element.
111      *
112      * @return the object.
113      *
114      * @throws XmlReaderException if there is a parsing error.
115      */
116     public Object JavaDoc getObject() throws XmlReaderException {
117         return new Object JavaDoc[] {this.key, this.value};
118     }
119
120     /**
121      * Returns the key.
122      *
123      * @return the key.
124      */
125     public Object JavaDoc getKey() {
126         return this.key;
127     }
128
129     /**
130      * Returns the value.
131      *
132      * @return the value.
133      */
134     public Object JavaDoc getValue() {
135         return this.value;
136     }
137     
138 }
139
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