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 * RenderingHintValueReadHandler.java
029 * ----------------------------------
030 * (C)opyright 2003, by Thomas Morgner and Contributors.
031 *
032 * Original Author: Thomas Morgner;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: RenderingHintValueReadHandler.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
044 package org.jfree.xml.parser.coretypes;
045
046 import java.awt.RenderingHints;
047 import java.lang.reflect.Field;
048 import java.lang.reflect.Modifier;
049
050 import org.jfree.util.Log;
051 import org.jfree.xml.parser.AbstractXmlReadHandler;
052 import org.jfree.xml.parser.XmlReaderException;
053 import org.xml.sax.Attributes;
054 import org.xml.sax.SAXException;
055
056 /**
057 * A read handler for a rendering hint value.
058 */
059 public class RenderingHintValueReadHandler extends AbstractXmlReadHandler {
060
061 /** The key under construction. */
062 private Object key;
063
064 /** The value under construction. */
065 private Object value;
066
067 /**
068 * Creates a new read handler.
069 */
070 public RenderingHintValueReadHandler() {
071 super();
072 }
073
074 /**
075 * Starts parsing.
076 *
077 * @param attrs the attributes.
078 *
079 * @throws SAXException if there is a parsing error.
080 */
081 protected void startParsing(final Attributes attrs) throws SAXException {
082 final String keyText = attrs.getValue("key");
083 final String valueText = attrs.getValue("value");
084 this.key = stringToHintField(keyText);
085 this.value = stringToHintField(valueText);
086 }
087
088 private Object stringToHintField (final String name) {
089 final Field[] fields = RenderingHints.class.getFields();
090 for (int i = 0; i < fields.length; i++) {
091 final Field f = fields[i];
092 if (Modifier.isFinal(f.getModifiers())
093 && Modifier.isPublic(f.getModifiers())
094 && Modifier.isStatic(f.getModifiers())) {
095 try {
096 final String fieldName = f.getName();
097 if (fieldName.equals(name)) {
098 return f.get(null);
099 }
100 }
101 catch (Exception e) {
102 Log.info ("Unable to write RenderingHint", e);
103 }
104 }
105 }
106 throw new IllegalArgumentException("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 getObject() throws XmlReaderException {
117 return new Object[] {this.key, this.value};
118 }
119
120 /**
121 * Returns the key.
122 *
123 * @return the key.
124 */
125 public Object getKey() {
126 return this.key;
127 }
128
129 /**
130 * Returns the value.
131 *
132 * @return the value.
133 */
134 public Object getValue() {
135 return this.value;
136 }
137
138 }