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


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.DoubleCollection;
23
24 /**
25  * Adapts an {@link DoubleCollection DoubleCollection}
26  * to the {@link java.util.Collection Collection}
27  * interface.
28  * <p />
29  * This implementation delegates most methods
30  * to the provided {@link DoubleCollection DoubleCollection}
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 DoubleCollectionCollection extends AbstractDoubleCollectionCollection implements Serializable JavaDoc {
38     
39     /**
40      * Create a {@link Collection Collection} wrapping
41      * the specified {@link DoubleCollection DoubleCollection}. When
42      * the given <i>collection</i> is <code>null</code>,
43      * returns <code>null</code>.
44      *
45      * @param collection the (possibly <code>null</code>)
46      * {@link DoubleCollection DoubleCollection} to wrap
47      * @return a {@link Collection Collection} wrapping the given
48      * <i>collection</i>, or <code>null</code> when <i>collection</i> is
49      * <code>null</code>.
50      */
51     public static Collection JavaDoc wrap(DoubleCollection collection) {
52         if(null == collection) {
53             return null;
54         } else if(collection instanceof Serializable JavaDoc) {
55             return new DoubleCollectionCollection(collection);
56         } else {
57             return new NonSerializableDoubleCollectionCollection(collection);
58         }
59     }
60     
61     /**
62      * Creates a {@link Collection Collection} wrapping
63      * the specified {@link DoubleCollection DoubleCollection}.
64      * @see #wrap
65      */
66     public DoubleCollectionCollection(DoubleCollection collection) {
67         _collection = collection;
68     }
69     
70
71     protected DoubleCollection getDoubleCollection() {
72         return _collection;
73     }
74         
75     private DoubleCollection _collection = null;
76 }
77
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