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.]
   * 
   * ------------------------
   * GenericWriteHandler.java
   * ------------------------
   * (C)opyright 2003-2005, by Thomas Morgner and Contributors.
   *
   * Original Author:  Thomas Morgner;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * $Id: GenericWriteHandler.java,v 1.6 2005/11/16 15:58:41 taqua Exp $
   *
   * Changes
   * -------
   * 23-Sep-2003 : Initial version (TM);
   * 23-Dec-2003 : Added missing Javadocs (DG);
   * 
   */
  
  package org.jfree.xml.writer.coretypes;
  
  import java.io.IOException;
  import java.util.ArrayList;
  
  import org.jfree.util.Log;
  import org.jfree.xml.util.AttributeDefinition;
  import org.jfree.xml.util.GenericObjectFactory;
  import org.jfree.xml.util.ObjectDescriptionException;
  import org.jfree.xml.util.PropertyDefinition;
  import org.jfree.xml.writer.AbstractXmlWriteHandler;
  import org.jfree.xml.writer.AttributeList;
  import org.jfree.xml.writer.RootXmlWriteHandler;
  import org.jfree.xml.writer.XMLWriter;
  import org.jfree.xml.writer.XMLWriterException;
  
  /**
   * A handler for writing generic objects.
   */
  public class GenericWriteHandler extends AbstractXmlWriteHandler {
  
      private GenericObjectFactory factory;
  
      /**
       * Creates a new handler.
       * 
       * @param factory  the object factory.
       */
      public GenericWriteHandler(final GenericObjectFactory factory) {
          this.factory = factory;
      }
  
      /**
       * Performs the writing of a generic object.
       *
       * @param tagName  the tag name.
       * @param object  the generic object.
       * @param writer  the writer.
       * @param mPlexAttribute  ??.
       * @param mPlexValue  ??.
       * 
       * @throws IOException if there is an I/O error.
       * @throws XMLWriterException if there is a writer error.
       */
      public void write(final String tagName, final Object object, final XMLWriter writer,
                        final String mPlexAttribute, final String mPlexValue)
          throws IOException, XMLWriterException {
  
          try {
              this.factory.readProperties(object);
  
              final AttributeList attributes = new AttributeList();
              if (mPlexAttribute != null) {
                  attributes.setAttribute(mPlexAttribute, mPlexValue);
              }
              final AttributeDefinition[] attribDefs = this.factory.getAttributeDefinitions();
              final ArrayList properties = new ArrayList();
              for (int i = 0; i < attribDefs.length; i++) {
                  final AttributeDefinition adef = attribDefs[i];
                  final String pName = adef.getAttributeName();
                  final Object propValue = this.factory.getProperty(adef.getPropertyName());
                  if (propValue != null) {
                      Log.debug(
                          "Here: " + this.factory.getBaseClass() + " -> " + adef.getPropertyName()
                      );
                      final String value = adef.getHandler().toAttributeValue(propValue);
                      if (value != null) {
                          attributes.setAttribute(pName, value);
                      }
                  }
                  properties.add(adef.getPropertyName());
              }
              writer.writeTag(tagName, attributes, false);
              writer.startBlock();
  
              final PropertyDefinition[] propertyDefs = this.factory.getPropertyDefinitions();
              final RootXmlWriteHandler rootHandler = getRootHandler();
              for (int i = 0; i < propertyDefs.length; i++) {
                  final PropertyDefinition pDef = propertyDefs[i];
                  final String elementName = pDef.getElementName();
                  rootHandler.write
                      (elementName, this.factory.getProperty(pDef.getPropertyName()),
                              this.factory.getTypeForTagName(elementName), writer);
              }
              writer.endBlock();
              writer.writeCloseTag(tagName);
          }
          catch (ObjectDescriptionException ode) {
              Log.warn ("Unable to write element", ode);
              throw new IOException(ode.getMessage());
          }
      }
  
  }
  