001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.util;
018
019import javax.jms.Destination;
020import javax.jms.JMSException;
021import javax.jms.Message;
022
023import org.apache.activemq.command.ActiveMQMessage;
024
025/**
026 * A comparator which works on SendCommand objects to compare the destinations
027 * 
028 * 
029 */
030public class MessageDestinationComparator extends MessageComparatorSupport {
031
032    protected int compareMessages(Message message1, Message message2) {
033        return compareComparators(getComparable(getDestination(message1)), getComparable(getDestination(message2)));
034    }
035
036    protected Destination getDestination(Message message) {
037        if (message instanceof ActiveMQMessage) {
038            ActiveMQMessage amqMessage = (ActiveMQMessage)message;
039            return amqMessage.getDestination();
040        }
041        try {
042            return message.getJMSDestination();
043        } catch (JMSException e) {
044            return null;
045        }
046    }
047
048    protected Comparable getComparable(Destination destination) {
049        if (destination != null) {
050            return destination.toString();
051        }
052        return null;
053    }
054
055}