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 */
017package org.apache.commons.collections.primitives.decorators;
018
019import java.io.Serializable;
020
021import org.apache.commons.collections.primitives.DoubleList;
022
023/**
024 * 
025 * @since Commons Primitives 1.0
026 * @version $Revision: 480463 $ $Date: 2006-11-29 03:15:23 -0500 (Wed, 29 Nov 2006) $
027 * 
028 * @author Rodney Waldhoff 
029 */
030public final class UnmodifiableDoubleList extends BaseUnmodifiableDoubleList implements Serializable {
031    UnmodifiableDoubleList(DoubleList list) {
032        this.proxied = list;
033    }
034    
035    public static final DoubleList wrap(DoubleList list) {
036        if(null == list) {
037            return null; 
038        } else if(list instanceof UnmodifiableDoubleList) {
039            return list;
040        } else if(list instanceof Serializable) {
041            return new UnmodifiableDoubleList(list);
042        } else {
043            return new NonSerializableUnmodifiableDoubleList(list);
044        }
045    }
046
047    protected DoubleList getProxiedList() {
048        return proxied;
049    }
050
051    private DoubleList proxied = null;
052}