View Javadoc

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 javax.jms.Destination;
22  import javax.jms.JMSException;
23  import javax.jms.Message;
24  import java.util.ArrayList;
25  import java.util.List;
26  
27  /***
28   * Helper class for decomposing a Destination into a number of paths
29   * 
30   * @version $Revision: 1.1 $
31   */
32  public class DestinationPath {
33  
34      public static String[] getDestinationPaths(String subject) {
35          List list = new ArrayList();
36          int previous = 0;
37          int lastIndex = subject.length() - 1;
38          while (true) {
39              int idx = subject.indexOf('.', previous);
40              if (idx < 0) {
41                  list.add(subject.substring(previous, lastIndex + 1));
42                  break;
43              }
44              list.add(subject.substring(previous, idx));
45              previous = idx + 1;
46          }
47          String[] answer = new String[list.size()];
48          list.toArray(answer);
49          return answer;
50      }
51  
52      public static String[] getDestinationPaths(Message message) throws JMSException {
53          return getDestinationPaths(message.getJMSDestination());
54      }
55  
56      public static String[] getDestinationPaths(Destination destination) {
57          return getDestinationPaths(destination.toString());
58      }
59  
60      /***
61       * Converts the paths to a single String seperated by dots.
62       *
63       * @param paths
64       * @return
65       */
66      public static String toString(String[] paths) {
67          StringBuffer buffer = new StringBuffer();
68          for (int i = 0; i < paths.length; i++) {
69              if (i > 0) {
70                  buffer.append(".");
71              }
72              String path = paths[i];
73              if (path == null) {
74                  buffer.append("*");
75              }
76              else {
77                  buffer.append(path);
78              }
79          }
80          return buffer.toString();
81      }
82  }