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.IntCollection;
023
024/**
025 * Adapts a {@link java.lang.Number Number}-valued
026 * {@link java.util.Collection Collection} to the
027 * {@link IntCollection IntCollection} interface.
028 * <p />
029 * This implementation delegates most methods
030 * to the provided {@link Collection Collection} 
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 CollectionIntCollection extends AbstractCollectionIntCollection implements Serializable {
038    /**
039     * Create an {@link IntCollection IntCollection} wrapping
040     * the specified {@link Collection Collection}.  When
041     * the given <i>collection</i> is <code>null</code>,
042     * returns <code>null</code>.
043     * 
044     * @param collection the (possibly <code>null</code>) {@link Collection} to wrap
045     * @return an {@link IntCollection IntCollection} wrapping the given 
046     *         <i>collection</i>, or <code>null</code> when <i>collection</i> is
047     *         <code>null</code>.
048     */
049    public static IntCollection wrap(Collection collection) {
050        if(null == collection) {
051            return null;
052        } else if(collection instanceof Serializable) {
053            return new CollectionIntCollection(collection);
054        } else {
055            return new NonSerializableCollectionIntCollection(collection);
056        }
057    }
058
059    /**
060     * Creates an {@link IntCollection IntCollection} wrapping
061     * the specified {@link Collection Collection}.
062     * @see #wrap
063     */
064    public CollectionIntCollection(Collection collection) {
065        _collection = collection;
066    }
067    
068    protected Collection getCollection() {
069        return _collection;
070    }
071 
072    private Collection _collection = null;         
073}