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)
076: throws SAXException {
077: final String tagName = getTagName();
078: if (tagName.equals("objectRef")) {
079: final String sourceName = attrs.getValue("source");
080: if (sourceName == null) {
081: throw new SAXException("Source name is not defined.");
082: }
083: this .propertyName = attrs.getValue("property");
084: if (this .propertyName == null) {
085: throw new SAXException("Property name is not defined.");
086: }
087:
088: this .object = getRootHandler().getHelperObject(sourceName);
089: if (this .object == null) {
090: throw new SAXException(
091: "Referenced object is undefined.");
092: }
093: }
094: }
095:
096: /**
097: * Returns the property name.
098: *
099: * @return the property name.
100: */
101: public String getPropertyName() {
102: return this .propertyName;
103: }
104:
105: /**
106: * Returns the value.
107: *
108: * @return the value.
109: */
110: public Object getObject() {
111: return this.object;
112: }
113:
114: }
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