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: 1.2 $
31   */
32  public class DestinationPath {
33      protected static final char SEPARATOR = '.';
34  
35      public static String[] getDestinationPaths(String subject) {
36          List list = new ArrayList();
37          int previous = 0;
38          int lastIndex = subject.length() - 1;
39          while (true) {
40              int idx = subject.indexOf(SEPARATOR, previous);
41              if (idx < 0) {
42                  list.add(subject.substring(previous, lastIndex + 1));
43                  break;
44              }
45              list.add(subject.substring(previous, idx));
46              previous = idx + 1;
47          }
48          String[] answer = new String[list.size()];
49          list.toArray(answer);
50          return answer;
51      }
52  
53      public static String[] getDestinationPaths(Message message) throws JMSException {
54          return getDestinationPaths(message.getJMSDestination());
55      }
56  
57      public static String[] getDestinationPaths(Destination destination) {
58          return getDestinationPaths(destination.toString());
59      }
60  
61      /***
62       * Converts the paths to a single String seperated by dots.
63       *
64       * @param paths
65       * @return
66       */
67      public static String toString(String[] paths) {
68          StringBuffer buffer = new StringBuffer();
69          for (int i = 0; i < paths.length; i++) {
70              if (i > 0) {
71                  buffer.append(SEPARATOR);
72              }
73              String path = paths[i];
74              if (path == null) {
75                  buffer.append("*");
76              }
77              else {
78                  buffer.append(path);
79              }
80          }
81          return buffer.toString();
82      }
83  }