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}