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Java > Open Source Codes > org > apache > activemq > util > MessageDestinationComparator


1 /**
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one or more
4  * contributor license agreements. See the NOTICE file distributed with
5  * this work for additional information regarding copyright ownership.
6  * The ASF licenses this file to You under the Apache License, Version 2.0
7  * (the "License"); you may not use this file except in compliance with
8  * the License. You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 package org.apache.activemq.util;
19
20 import org.apache.activemq.command.ActiveMQMessage;
21
22 import javax.jms.*;
23
24 /**
25  * A comparator which works on SendCommand objects to compare the destinations
26  *
27  * @version $Revision: 426366 $
28  */
29 public class MessageDestinationComparator extends MessageComparatorSupport {
30
31     protected int compareMessages(Message message1, Message message2) {
32         return compareComparators(getComparable(getDestination(message1)), getComparable(getDestination(message2)));
33     }
34
35     protected Destination getDestination(Message message) {
36         if (message instanceof ActiveMQMessage) {
37             ActiveMQMessage amqMessage = (ActiveMQMessage) message;
38             return amqMessage.getDestination();
39         }
40         try {
41             return message.getJMSDestination();
42         }
43         catch (JMSException e) {
44             return null;
45         }
46     }
47
48     protected Comparable JavaDoc getComparable(Destination destination) {
49         if (destination != null) {
50             return destination.toString();
51         }
52         return null;
53     }
54
55
56     
57 }
58
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