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;
20 import java.util.Collection;
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 03:15:00 -0500 (Wed, 29 Nov 2006) $
35 */
36 final public class CollectionBooleanCollection
37 extends AbstractCollectionBooleanCollection implements Serializable {
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 collection) {
53 if(null == collection) {
54 return null;
55 } else if(collection instanceof Serializable) {
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 collection) {
70 _collection = collection;
71 }
72
73 protected Collection getCollection() {
74 return _collection;
75 }
76
77 private Collection _collection = null;
78 }