/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s): N/A.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.client.jrdf.util;
// Log4J
import org.apache.log4j.Logger;
// JRDF
import org.jrdf.graph.*;
/**
* Comparator used to compare the ObjectNodes in a Triple.
*
* @created 2004-08-16
*
* @author <a href="mailto:robert.turner@tucanatech.com">Robert Turner</a>
*
* @version $Revision: 1.8 $
*
* @modified $Date: 2005/01/05 04:57:37 $
*
* @maintenanceAuthor $Author: newmana $
*
* @company <A href="mailto:info@PIsoftware.com">Plugged In Software</A>
*
* @copyright ©2001 <a href="http://www.pisoftware.com/">Plugged In
* Software Pty Ltd</a>
*
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
public class ObjectNodeComparator extends NodeComparator<Triple> {
/**
* Logger. This is named after the class.
*/
@SuppressWarnings("unused")
private final static Logger log = Logger.getLogger(ObjectNodeComparator.class.getName());
/**
* Compares two JRDF Triples.
*
* @param triple1 Triple
* @param triple2 Triple
* @return int
*/
public int compare (Triple triple1, Triple triple2) {
//validate
if (triple1 == null) {
throw new IllegalArgumentException("'triple1' argument is null.");
}
if (triple2 == null) {
throw new IllegalArgumentException("'triple2' argument is null.");
}
//compare objects
return super.nodeCompare(triple1.getObject(), triple2.getObject());
}
}