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.Collection;
021
022import org.apache.commons.collections.primitives.BooleanCollection;
023
024/**
025 * Adapts a {@link Boolean Boolean}-valued {@link java.util.Collection
026 * Collection} to the {@link
027 * org.apache.commons.collections.primitives.BooleanCollection
028 * BooleanCollection} interface.
029 * <p/>
030 * This implementation delegates most methods to the provided
031 * {@link java.util.Collection Collection} implementation in the "obvious" way.
032 * 
033 * @since Commons Primitives 1.1
034 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
035 */
036final public class CollectionBooleanCollection
037        extends AbstractCollectionBooleanCollection implements Serializable {
038    /**
039     * Create an {@link
040     * org.apache.commons.collections.primitives.BooleanCollection
041     * BooleanCollection} wrapping the specified {@link java.util.Collection
042     * Collection}.  When the given <i>collection</i> is <code>null</code>,
043     * returns <code>null</code>.
044     * 
045     * @param collection the (possibly <code>null</code>) {@link
046     * java.util.Collection} to wrap
047     * @return an {@link
048     * org.apache.commons.collections.primitives.BooleanCollection
049     * BooleanCollection} wrapping the given <i>collection</i>, or <code>null
050     * </code> when <i>collection</i> is <code>null</code>.
051     */
052    public static BooleanCollection wrap(Collection collection) {
053        if(null == collection) {
054            return null;
055        } else if(collection instanceof Serializable) {
056            return new CollectionBooleanCollection(collection);
057        } else {
058            return new NonSerializableCollectionBooleanCollection(collection);
059        }
060    }
061
062    /**
063     * Creates an {@link
064     * org.apache.commons.collections.primitives.BooleanCollection
065     * BooleanCollection} wrapping the specified {@link java.util.Collection
066     * Collection}.
067     * @see #wrap
068     */
069    public CollectionBooleanCollection(Collection collection) {
070        _collection = collection;
071    }
072    
073    protected Collection getCollection() {
074        return _collection;
075    }
076 
077    private Collection _collection = null;         
078}