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.util;
16  
17  import java.util.LinkedHashMap;
18  import java.util.Map;
19  
20  /**
21   * <a href="LRUMap.java.html"><b><i>View Source</i></b></a>
22   *
23   * @author Brian Wing Shun Chan
24   */
25  public class LRUMap<K, V> extends LinkedHashMap<K, V> {
26  
27      public LRUMap(int capacity) {
28          super(capacity * 3 / 2, 0.75f, true);
29  
30          _capacity = capacity;
31      }
32  
33      protected boolean removeEldestEntry(Map.Entry<K, V> eldest) {
34          if (size() > _capacity) {
35              return true;
36          }
37          else {
38              return false;
39          }
40      }
41  
42      private int _capacity;
43  
44  }