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Java > Open Source Codes > org > apache > commons > collections > primitives > adapters > CollectionIntCollection


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.commons.collections.primitives.adapters;
18
19 import java.io.Serializable JavaDoc;
20 import java.util.Collection JavaDoc;
21
22 import org.apache.commons.collections.primitives.IntCollection;
23
24 /**
25  * Adapts a {@link java.lang.Number Number}-valued
26  * {@link java.util.Collection Collection} to the
27  * {@link IntCollection IntCollection} interface.
28  * <p />
29  * This implementation delegates most methods
30  * to the provided {@link Collection Collection}
31  * implementation in the "obvious" way.
32  *
33  * @since Commons Primitives 1.0
34  * @version $Revision: 480462 $ $Date: 2006-11-29 00:15:00 -0800 (Wed, 29 Nov 2006) $
35  * @author Rodney Waldhoff
36  */
37 final public class CollectionIntCollection extends AbstractCollectionIntCollection implements Serializable JavaDoc {
38     /**
39      * Create an {@link IntCollection IntCollection} wrapping
40      * the specified {@link Collection Collection}. When
41      * the given <i>collection</i> is <code>null</code>,
42      * returns <code>null</code>.
43      *
44      * @param collection the (possibly <code>null</code>) {@link Collection} to wrap
45      * @return an {@link IntCollection IntCollection} wrapping the given
46      * <i>collection</i>, or <code>null</code> when <i>collection</i> is
47      * <code>null</code>.
48      */
49     public static IntCollection wrap(Collection JavaDoc collection) {
50         if(null == collection) {
51             return null;
52         } else if(collection instanceof Serializable JavaDoc) {
53             return new CollectionIntCollection(collection);
54         } else {
55             return new NonSerializableCollectionIntCollection(collection);
56         }
57     }
58
59     /**
60      * Creates an {@link IntCollection IntCollection} wrapping
61      * the specified {@link Collection Collection}.
62      * @see #wrap
63      */
64     public CollectionIntCollection(Collection JavaDoc collection) {
65         _collection = collection;
66     }
67     
68     protected Collection JavaDoc getCollection() {
69         return _collection;
70     }
71  
72     private Collection JavaDoc _collection = null;
73 }
74
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