001 /** 002 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved. 003 * 004 * The contents of this file are subject to the terms of the Liferay Enterprise 005 * Subscription License ("License"). You may not use this file except in 006 * compliance with the License. You can obtain a copy of the License by 007 * contacting Liferay, Inc. See the License for the specific language governing 008 * permissions and limitations under the License, including but not limited to 009 * distribution rights of the Software. 010 * 011 * 012 * 013 */ 014 015 package com.liferay.portal.kernel.util; 016 017 import java.util.LinkedHashMap; 018 import java.util.Map; 019 020 /** 021 * @author Brian Wing Shun Chan 022 */ 023 public class LRUMap<K, V> extends LinkedHashMap<K, V> { 024 025 public LRUMap(int capacity) { 026 super(capacity * 3 / 2, 0.75f, true); 027 028 _capacity = capacity; 029 } 030 031 protected boolean removeEldestEntry(Map.Entry<K, V> eldest) { 032 if (size() > _capacity) { 033 return true; 034 } 035 else { 036 return false; 037 } 038 } 039 040 private int _capacity; 041 042 }