1 package org.apache.commons.jcs3.utils.struct; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 /** 23 * Simple LRUMap implementation that keeps the number of the objects below or equal maxObjects 24 * 25 * @param <K> 26 * @param <V> 27 */ 28 public class LRUMap<K, V> extends AbstractLRUMap<K, V> 29 { 30 /** if the max is less than 0, there is no limit! */ 31 private int maxObjects = -1; 32 33 public LRUMap() 34 { 35 } 36 37 /** 38 * 39 * @param maxObjects 40 * maximum number to keep in the map 41 */ 42 public LRUMap(final int maxObjects) 43 { 44 this(); 45 this.maxObjects = maxObjects; 46 } 47 48 @Override 49 public boolean shouldRemove() 50 { 51 return maxObjects > 0 && this.size() > maxObjects; 52 } 53 }