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.adapters;
018    
019    import java.io.Serializable;
020    import java.util.Collection;
021    
022    import 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 09:15:00 +0100 (Wed, 29 Nov 2006) $
035     */
036    final 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    }