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.List;
21
22 import org.apache.commons.collections.primitives.DoubleList;
23
24 /**
25 * Adapts an {@link DoubleList DoubleList} to the
26 * {@link List List} interface.
27 * <p />
28 * This implementation delegates most methods
29 * to the provided {@link DoubleList DoubleList}
30 * implementation in the "obvious" way.
31 *
32 * @since Commons Primitives 1.0
33 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
34 * @author Rodney Waldhoff
35 */
36 final public class DoubleListList extends AbstractDoubleListList implements Serializable {
37
38 /**
39 * Create a {@link List List} wrapping
40 * the specified {@link DoubleList DoubleList}. When
41 * the given <i>list</i> is <code>null</code>,
42 * returns <code>null</code>.
43 *
44 * @param list the (possibly <code>null</code>)
45 * {@link DoubleList DoubleList} to wrap
46 * @return a {@link List List} wrapping the given
47 * <i>list</i>, or <code>null</code> when <i>list</i> is
48 * <code>null</code>.
49 */
50 public static List wrap(DoubleList list) {
51 if(null == list) {
52 return null;
53 } else if(list instanceof Serializable) {
54 return new DoubleListList(list);
55 } else {
56 return new NonSerializableDoubleListList(list);
57 }
58 }
59
60 /**
61 * Creates a {@link List List} wrapping
62 * the specified {@link DoubleList DoubleList}.
63 * @see #wrap
64 */
65 public DoubleListList(DoubleList list) {
66 _list = list;
67 }
68
69 protected DoubleList getDoubleList() {
70 return _list;
71 }
72
73 private DoubleList _list = null;
74 }