001    package org.apache.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     */
026    public 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    }