content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   * 
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * This library is free software; you can redistribute it and/or modify it 
   * under the terms of the GNU Lesser General Public License as published by 
   * the Free Software Foundation; either version 2.1 of the License, or 
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but 
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
   * USA.  
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
   * in the United States and other countries.]
   * 
   * ---------------------
   * ObjectRefHandler.java
   * ---------------------
   * (C)opyright 2003, by Thomas Morgner and Contributors.
   *
   * Original Author:  Thomas Morgner;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * $Id: ObjectRefHandler.java,v 1.3 2005/10/18 13:33:32 mungady Exp $
   *
   * Changes
   * -------
   * 29-Sep-2003 : Initial version (TM);
   * 25-Nov-2003 : Updated header and Javadocs (DG);
   *
   */
  
  package org.jfree.xml.parser.coretypes;
  
  import org.jfree.xml.parser.AbstractXmlReadHandler;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  
  /**
   * A SAX handler for an object reference.
   */
  public class ObjectRefHandler extends AbstractXmlReadHandler {
  
      /** The object. */
      private Object object;
    
      /** The property name. */
      private String propertyName;
  
      /**
       * Creates a new handler.
       */
      public ObjectRefHandler() {
          super();
      }
  
      /**
       * Starts parsing.
       * 
       * @param attrs  the attributes.
       * 
       * @throws SAXException ???.
       */
      protected void startParsing(final Attributes attrs) throws SAXException {
          final String tagName = getTagName();
          if (tagName.equals("objectRef")) {
              final String sourceName = attrs.getValue("source");
              if (sourceName == null) {
                  throw new SAXException("Source name is not defined.");
              }
              this.propertyName = attrs.getValue("property");
              if (this.propertyName == null) {
                  throw new SAXException("Property name is not defined.");
              }
  
              this.object = getRootHandler().getHelperObject(sourceName);
              if (this.object == null) {
                  throw new SAXException("Referenced object is undefined.");
              }
          }
      }
  
      /**
       * Returns the property name.
       * 
       * @return the property name.
       */
      public String getPropertyName() {
          return this.propertyName;
      }
  
      /**
       * Returns the value.
       * 
       * @return the value.
       */
      public Object getObject() {
          return this.object;
      }
  
  }
  