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.adapters;
018
019import java.io.Serializable;
020import java.util.List;
021
022import org.apache.commons.collections.primitives.BooleanList;
023
024/**
025 * Adapts a {@link Number}-valued {@link List List} 
026 * to the {@link BooleanList BooleanList} interface.
027 * <p />
028 * This implementation delegates most methods
029 * to the provided {@link List List} 
030 * implementation in the "obvious" way.
031 *
032 * @since Commons Primitives 1.1
033 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
034 * @author Rodney Waldhoff 
035 */
036public class ListBooleanList extends AbstractListBooleanList implements Serializable {
037    
038    /**
039     * Create an {@link BooleanList BooleanList} wrapping
040     * the specified {@link List List}.  When
041     * the given <i>list</i> is <code>null</code>,
042     * returns <code>null</code>.
043     * 
044     * @param list the (possibly <code>null</code>) 
045     *        {@link List List} to wrap
046     * @return a {@link BooleanList BooleanList} wrapping the given 
047     *         <i>list</i>, or <code>null</code> when <i>list</i> is
048     *         <code>null</code>.
049     */
050    public static BooleanList wrap(List list) {
051        if(null == list) {
052            return null;
053        } else if(list instanceof Serializable) {
054            return new ListBooleanList(list);
055        } else {
056            return new NonSerializableListBooleanList(list);
057        }
058    }
059
060    /**
061     * Creates an {@link BooleanList BooleanList} wrapping
062     * the specified {@link List List}.
063     * @see #wrap
064     */
065    public ListBooleanList(List list) {
066        _list = list;     
067    }
068    
069    protected List getList() {
070        return _list;
071    }
072        
073    private List _list = null;
074    
075}