001/* 002 * (C) Copyright 2006-2009 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Nuxeo - initial API and implementation 016 * 017 * $Id$ 018 */ 019 020package org.nuxeo.ecm.platform.web.common.requestcontroller.service; 021 022import java.util.LinkedHashMap; 023import java.util.Map; 024 025/** 026 * @author tiry 027 */ 028public class LRUCachingMap<K, V> extends LinkedHashMap<K, V> { 029 030 private static final long serialVersionUID = 1L; 031 032 private final int maxCachedItems; 033 034 public LRUCachingMap(int maxCachedItems) { 035 super(maxCachedItems, 1.0f, true); 036 this.maxCachedItems = maxCachedItems; 037 } 038 039 @Override 040 protected boolean removeEldestEntry(Map.Entry<K, V> eldest) { 041 return size() > maxCachedItems; 042 } 043 044}