001package org.apache.commons.jcs3.utils.struct; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022/** 023 * Simple LRUMap implementation that keeps the number of the objects below or equal maxObjects 024 * 025 * @param <K> 026 * @param <V> 027 */ 028public class LRUMap<K, V> extends AbstractLRUMap<K, V> 029{ 030 /** if the max is less than 0, there is no limit! */ 031 private int maxObjects = -1; 032 033 public LRUMap() 034 { 035 } 036 037 /** 038 * 039 * @param maxObjects 040 * maximum number to keep in the map 041 */ 042 public LRUMap(final int maxObjects) 043 { 044 this(); 045 this.maxObjects = maxObjects; 046 } 047 048 @Override 049 public boolean shouldRemove() 050 { 051 return maxObjects > 0 && this.size() > maxObjects; 052 } 053}