1 /***
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18
19 package org.codehaus.activemq.filter;
20
21 import org.codehaus.activemq.message.ActiveMQDestination;
22
23 import javax.jms.Destination;
24 import javax.jms.JMSException;
25 import javax.jms.Message;
26
27
28 /***
29 * Represents a filter which only operates on Destinations
30 *
31 * @version $Revision: 1.3 $
32 */
33 public abstract class DestinationFilter implements Filter {
34 public static final String ANY_DESCENDENT = ">";
35 public static final String ANY_CHILD = "*";
36
37 public boolean matches(Message message) throws JMSException {
38 return matches(message.getJMSDestination());
39 }
40
41 public abstract boolean matches(Destination destination);
42
43 public static DestinationFilter parseFilter(Destination destination) {
44 if (destination instanceof ActiveMQDestination) {
45 ActiveMQDestination activeDestination = (ActiveMQDestination) destination;
46 if (activeDestination.isComposite()) {
47 return new CompositeDestinationFilter(activeDestination);
48 }
49 }
50 String[] paths = DestinationPath.getDestinationPaths(destination);
51 int idx = paths.length - 1;
52 if (idx >= 0) {
53 String lastPath = paths[idx];
54 if (lastPath.equals(ANY_DESCENDENT)) {
55 return new PrefixDestinationFilter(paths);
56 }
57 else if (lastPath.equals(ANY_CHILD)) {
58 return new WildcardDestinationFilter(paths);
59 }
60 }
61
62
63 return new SimpleDestinationFilter(destination);
64 }
65 }