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


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.BooleanCollection;
23
24 /**
25  * Adapts a {@link Boolean Boolean}-valued {@link java.util.Collection
26  * Collection} to the {@link
27  * org.apache.commons.collections.primitives.BooleanCollection
28  * BooleanCollection} interface.
29  * <p/>
30  * This implementation delegates most methods to the provided
31  * {@link java.util.Collection Collection} implementation in the "obvious" way.
32  *
33  * @since Commons Primitives 1.1
34  * @version $Revision: 480462 $ $Date: 2006-11-29 00:15:00 -0800 (Wed, 29 Nov 2006) $
35  */
36 final public class CollectionBooleanCollection
37         extends AbstractCollectionBooleanCollection implements Serializable JavaDoc {
38     /**
39      * Create an {@link
40      * org.apache.commons.collections.primitives.BooleanCollection
41      * BooleanCollection} wrapping the specified {@link java.util.Collection
42      * Collection}. When the given <i>collection</i> is <code>null</code>,
43      * returns <code>null</code>.
44      *
45      * @param collection the (possibly <code>null</code>) {@link
46      * java.util.Collection} to wrap
47      * @return an {@link
48      * org.apache.commons.collections.primitives.BooleanCollection
49      * BooleanCollection} wrapping the given <i>collection</i>, or <code>null
50      * </code> when <i>collection</i> is <code>null</code>.
51      */
52     public static BooleanCollection wrap(Collection JavaDoc collection) {
53         if(null == collection) {
54             return null;
55         } else if(collection instanceof Serializable JavaDoc) {
56             return new CollectionBooleanCollection(collection);
57         } else {
58             return new NonSerializableCollectionBooleanCollection(collection);
59         }
60     }
61
62     /**
63      * Creates an {@link
64      * org.apache.commons.collections.primitives.BooleanCollection
65      * BooleanCollection} wrapping the specified {@link java.util.Collection
66      * Collection}.
67      * @see #wrap
68      */
69     public CollectionBooleanCollection(Collection JavaDoc collection) {
70         _collection = collection;
71     }
72     
73     protected Collection JavaDoc getCollection() {
74         return _collection;
75     }
76  
77     private Collection JavaDoc _collection = null;
78 }
79
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