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Java > Open Source Codes > org > columba > core > command > DefaultCommandReference


1 //The contents of this file are subject to the Mozilla Public License Version 1.1
2 //(the "License"); you may not use this file except in compliance with the
3 //License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
4 //
5 //Software distributed under the License is distributed on an "AS IS" basis,
6 //WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
7 //for the specific language governing rights and
8 //limitations under the License.
9 //
10 //The Original Code is "The Columba Project"
11 //
12 //The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
13 //Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
14 //
15 //All Rights Reserved.
16 package org.columba.core.command;
17
18 import org.columba.api.command.ICommandReference;
19 import org.columba.core.base.Lock;
20
21 /**
22  * Encapsulates the reference for a {@link Command}.
23  *
24  * @author fdietz, tstich
25  */
26 public class DefaultCommandReference implements ICommandReference {
27     /**
28      * a lock to claim access on some resource
29      */
30     protected Lock lock = new Lock();
31
32     /**
33      * Try to get lock.
34      *
35      * @param locker
36      * the instance who wants to have the lock
37      *
38      * @return true, if locker has got the lock, false otherwise
39      */
40     public boolean tryToGetLock(Object JavaDoc locker) {
41         return lock.tryToGetLock(locker);
42     }
43
44     /**
45      * Release lock.
46      */
47     public void releaseLock(Object JavaDoc locker) {
48         lock.release(locker);
49     }
50 }
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