/* ========================================================================
* 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());
}
}
}