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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  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  package org.apache.log4j.chainsaw;
18  
19  import java.awt.event.ActionEvent;
20  
21  import javax.swing.AbstractAction;
22  import javax.swing.Action;
23  
24  import org.apache.log4j.chainsaw.help.HelpManager;
25  
26  
27  /**
28   * @author psmith
29   *
30   */
31  class CommonActions
32  {
33      private static CommonActions instance = null;
34      private static Action SHOW_RELEASE_NOTE; 
35      
36      
37      private void initActions() {
38          SHOW_RELEASE_NOTE = new AbstractAction("Release Notes") {
39  
40              public void actionPerformed(ActionEvent e)
41              {
42                  HelpManager.getInstance().setHelpURL(ChainsawConstants.RELEASE_NOTES_URL);
43                  
44              }};
45      }
46      
47      static synchronized CommonActions getInstance() {
48          if(instance==null) {
49              instance = new CommonActions();
50          }
51          return instance;
52      }
53      
54      /**
55       * 
56       */
57      private CommonActions()
58      {
59          initActions();
60      }
61  
62      /**
63       * @return
64       */
65      public Action getShowReleaseNotes()
66      {
67          return SHOW_RELEASE_NOTE;
68      }
69  
70  }