CollectionClearAction


1   /*====================================================================
2   
3   Objectweb Explorer Framework
4   Copyright (C) 2000-2004 INRIA - USTL - LIFL - GOAL
5   Contact: openccm@objectweb.org
6   
7   This library is free software; you can redistribute it and/or
8   modify it under the terms of the GNU Lesser General Public
9   License as published by the Free Software Foundation; either
10  version 2.1 of the License, or any later version.
11  
12  This library is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  Lesser General Public License for more details.
16  
17  You should have received a copy of the GNU Lesser General Public
18  License along with this library; if not, write to the Free Software
19  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
20  USA
21  
22  Initial developer(s): Jerome Moroy, Philippe Merle.
23  Contributor(s): ______________________________________.
24  
25  ====================================================================*/
26  
27  package org.objectweb.util.explorer.plugin.java;
28  
29  import java.util.Collection  ;
30  
31  import org.objectweb.util.explorer.api.MenuItem;
32  import org.objectweb.util.explorer.api.MenuItemTreeView;
33  import org.objectweb.util.explorer.api.TreeView;
34  
35  
36  /**
37   * This action clears all the elements of a <code>java.util.Collection</code> object.
38   * A <code>UnsupportedOperationException</code> may be thrown if the implementation 
39   * of the collection doesn't supported the requested operation. 
40   *
41   * @author <a HREF="mailto:Philippe.Merle@lifl.fr">Philippe Merle</a>,
42   *         <a HREF="mailto:Jerome.Moroy@lifl.fr">J�r�me Moroy</a>
43   * 
44   * @version 0.1
45   */
46  public class CollectionClearAction 
47    implements MenuItem 
48  {
49  
50      //==================================================================
51      //
52      // No internal state.
53      //
54      //==================================================================
55  
56      //==================================================================
57      //
58      // No constructor.
59      // 
60      //==================================================================
61  
62      //==================================================================
63      //
64      // No internal method.
65      //
66      //==================================================================
67  
68      //==================================================================
69      //
70      // Public methods for MenuItem.
71      //
72      //==================================================================
73  
74      /* (non-Javadoc)
75       * @see org.objectweb.util.explorer.api.MenuItem#getStatus(org.objectweb.util.explorer.api.TreeView)
76       */
77      public int 
78      getStatus(TreeView treeView) {
79          return MenuItem.ENABLED_STATUS;    
80      }
81  
82      /* (non-Javadoc)
83       * @see org.objectweb.util.explorer.api.MenuItem#actionPerformed(org.objectweb.util.explorer.api.MenuItemTreeView)
84       */
85      public void 
86      actionPerformed(MenuItemTreeView treeView) 
87      throws Exception   {
88          Collection   collection = (Collection  )treeView.getSelectedObject();
89          collection.clear();    
90      }
91  
92  }
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