001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.commons.collections.primitives.decorators;
018    
019    import java.io.Serializable;
020    
021    import org.apache.commons.collections.primitives.ShortList;
022    
023    /**
024     * 
025     * @since Commons Primitives 1.0
026     * @version $Revision: 480463 $ $Date: 2006-11-29 09:15:23 +0100 (Wed, 29 Nov 2006) $
027     * 
028     * @author Rodney Waldhoff 
029     */
030    public final class UnmodifiableShortList extends BaseUnmodifiableShortList implements Serializable {
031        UnmodifiableShortList(ShortList list) {
032            this.proxied = list;
033        }
034        
035        public static final ShortList wrap(ShortList list) {
036            if(null == list) {
037                return null; 
038            } else if(list instanceof UnmodifiableShortList) {
039                return list;
040            } else if(list instanceof Serializable) {
041                return new UnmodifiableShortList(list);
042            } else {
043                return new NonSerializableUnmodifiableShortList(list);
044            }
045        }
046    
047        protected ShortList getProxiedList() {
048            return proxied;
049        }
050    
051        private ShortList proxied = null;
052    }