001    package org.apache.jcs.engine.memory.util;
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    import java.io.Serializable;
023    
024    import org.apache.jcs.engine.behavior.ICacheElement;
025    import org.apache.jcs.utils.struct.DoubleLinkedListNode;
026    
027    /**
028     * This wrapper is needed for double linked lists.
029     */
030    public class MemoryElementDescriptor<K extends Serializable, V extends Serializable>
031        extends DoubleLinkedListNode<ICacheElement<K, V>>
032    {
033        /** Don't change */
034        private static final long serialVersionUID = -1905161209035522460L;
035    
036        /** The CacheElement wrapped by this descriptor */
037        public ICacheElement<K, V> ce;
038    
039        /**
040         * Constructs a usable MemoryElementDescriptor.
041         * <p>
042         * @param ce
043         */
044        public MemoryElementDescriptor( ICacheElement<K, V> ce )
045        {
046            super( ce );
047            this.ce = ce;
048        }
049    }