001package org.apache.commons.jcs.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 * This is a node in the double linked list. It is stored as the value in the underlying map used by
024 * the LRUMap class.
025 */
026public class LRUElementDescriptor<K, V>
027    extends DoubleLinkedListNode<V>
028{
029    /** Don't change. */
030    private static final long serialVersionUID = 8249555756363020156L;
031
032    /** The key value */
033    private K key;
034
035    /**
036     * @param key
037     * @param payloadP
038     */
039    public LRUElementDescriptor(K key, V payloadP)
040    {
041        super(payloadP);
042        this.setKey(key);
043    }
044
045    /**
046     * @param key The key to set.
047     */
048    public void setKey(K key)
049    {
050        this.key = key;
051    }
052
053    /**
054     * @return Returns the key.
055     */
056    public K getKey()
057    {
058        return key;
059    }
060}