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.CharCollection;
23
24 /**
25 * Adapts a {@link java.lang.Number Number}-valued
26 * {@link java.util.Collection Collection} to the
27 * {@link CharCollection CharCollection} 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 03:15:00 -0500 (Wed, 29 Nov 2006) $
35 * @author Rodney Waldhoff
36 */
37 final public class CollectionCharCollection extends AbstractCollectionCharCollection implements Serializable {
38 /**
39 * Create an {@link CharCollection CharCollection} 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 CharCollection CharCollection} wrapping the given
46 * <i>collection</i>, or <code>null</code> when <i>collection</i> is
47 * <code>null</code>.
48 */
49 public static CharCollection wrap(Collection collection) {
50 if(null == collection) {
51 return null;
52 } else if(collection instanceof Serializable) {
53 return new CollectionCharCollection(collection);
54 } else {
55 return new NonSerializableCollectionCharCollection(collection);
56 }
57 }
58
59 /**
60 * Creates an {@link CharCollection CharCollection} wrapping
61 * the specified {@link Collection Collection}.
62 * @see #wrap
63 */
64 public CollectionCharCollection(Collection collection) {
65 _collection = collection;
66 }
67
68 protected Collection getCollection() {
69 return _collection;
70 }
71
72 private Collection _collection = null;
73 }