1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
13   */
14  
15  package com.liferay.portal.kernel.concurrent;
16  
17  import com.liferay.portal.kernel.util.MapBackedSet;
18  
19  import java.util.Set;
20  import java.util.concurrent.ConcurrentHashMap;
21  
22  /**
23   * <a href="ConcurrentHashSet.java.html"><b><i>View Source</i></b></a>
24   *
25   * @author Brian Wing Shun Chan
26   */
27  public class ConcurrentHashSet<E> extends MapBackedSet<E> {
28  
29      public ConcurrentHashSet() {
30          super(new ConcurrentHashMap<E, Boolean>());
31      }
32  
33      public ConcurrentHashSet(int capacity) {
34          super(new ConcurrentHashMap<E, Boolean>(capacity));
35      }
36  
37      public ConcurrentHashSet(Set<E> set) {
38          super(new ConcurrentHashMap<E, Boolean>());
39  
40          addAll(set);
41      }
42  
43  }