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.LongCollection;
023
024/**
025 * Adapts an {@link LongCollection LongCollection}
026 * to the {@link java.util.Collection Collection}
027 * interface.
028 * <p />
029 * This implementation delegates most methods
030 * to the provided {@link LongCollection LongCollection} 
031 * implementation in the "obvious" way.
032 * 
033 * @since Commons Primitives 1.0
034 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
035 * @author Rodney Waldhoff 
036 */
037final public class LongCollectionCollection extends AbstractLongCollectionCollection implements Serializable {
038    
039    /**
040     * Create a {@link Collection Collection} wrapping
041     * the specified {@link LongCollection LongCollection}.  When
042     * the given <i>collection</i> is <code>null</code>,
043     * returns <code>null</code>.
044     * 
045     * @param collection the (possibly <code>null</code>) 
046     *        {@link LongCollection LongCollection} to wrap
047     * @return a {@link Collection Collection} wrapping the given 
048     *         <i>collection</i>, or <code>null</code> when <i>collection</i> is
049     *         <code>null</code>.
050     */
051    public static Collection wrap(LongCollection collection) {
052        if(null == collection) {
053            return null;
054        } else if(collection instanceof Serializable) {
055            return new LongCollectionCollection(collection);
056        } else {
057            return new NonSerializableLongCollectionCollection(collection);
058        }
059    }
060    
061    /**
062     * Creates a {@link Collection Collection} wrapping
063     * the specified {@link LongCollection LongCollection}.
064     * @see #wrap
065     */
066    public LongCollectionCollection(LongCollection collection) {
067        _collection = collection;
068    }
069    
070
071    protected LongCollection getLongCollection() {
072        return _collection;
073    }
074        
075    private LongCollection _collection = null;
076}