/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2006-2008 Sun Microsystems, Inc.
*/
package org.opends.server.replication.server;
import java.util.Comparator;
import org.opends.server.replication.common.ChangeNumber;
import org.opends.server.replication.protocol.UpdateMsg;
/**
* Class to use for establishing an order within UpdateMessages.
*/
public class UpdateComparator implements Comparator<UpdateMsg>
{
/**
* The UpdateComparator Singleton.
*/
public static UpdateComparator comparator = new UpdateComparator();
/**
* Private constructor.
*/
private UpdateComparator()
{
super();
}
/**
* Compares two UpdateMessages.
*
* @param msg1 first UpdateMsg to compare
* @param msg2 second UpdateMsg to compare
* @return -1 if msg1 < msg2
* 0 if msg1 == msg2
* 1 if msg1 > msg2
*/
public int compare(UpdateMsg msg1, UpdateMsg msg2)
{
return ChangeNumber.compare(msg1.getChangeNumber(), msg2.getChangeNumber());
}
}