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