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 * ObjectRefHandler.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: ObjectRefHandler.java,v 1.3 2005/10/18 13:33:32 mungady Exp $
036 *
037 * Changes
038 * -------
039 * 29-Sep-2003 : Initial version (TM);
040 * 25-Nov-2003 : Updated header and Javadocs (DG);
041 *
042 */
043
044 package org.jfree.xml.parser.coretypes;
045
046 import org.jfree.xml.parser.AbstractXmlReadHandler;
047 import org.xml.sax.Attributes;
048 import org.xml.sax.SAXException;
049
050 /**
051 * A SAX handler for an object reference.
052 */
053 public class ObjectRefHandler extends AbstractXmlReadHandler {
054
055 /** The object. */
056 private Object object;
057
058 /** The property name. */
059 private String propertyName;
060
061 /**
062 * Creates a new handler.
063 */
064 public ObjectRefHandler() {
065 super();
066 }
067
068 /**
069 * Starts parsing.
070 *
071 * @param attrs the attributes.
072 *
073 * @throws SAXException ???.
074 */
075 protected void startParsing(final Attributes attrs) throws SAXException {
076 final String tagName = getTagName();
077 if (tagName.equals("objectRef")) {
078 final String sourceName = attrs.getValue("source");
079 if (sourceName == null) {
080 throw new SAXException("Source name is not defined.");
081 }
082 this.propertyName = attrs.getValue("property");
083 if (this.propertyName == null) {
084 throw new SAXException("Property name is not defined.");
085 }
086
087 this.object = getRootHandler().getHelperObject(sourceName);
088 if (this.object == null) {
089 throw new SAXException("Referenced object is undefined.");
090 }
091 }
092 }
093
094 /**
095 * Returns the property name.
096 *
097 * @return the property name.
098 */
099 public String getPropertyName() {
100 return this.propertyName;
101 }
102
103 /**
104 * Returns the value.
105 *
106 * @return the value.
107 */
108 public Object getObject() {
109 return this.object;
110 }
111
112 }