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.collections4.list;
18
19 import java.io.IOException;
20 import java.io.ObjectInputStream;
21 import java.io.ObjectOutputStream;
22 import java.util.Collection;
23 import java.util.List;
24
25 /**
26 * Serializable subclass of AbstractListDecorator.
27 *
28 * @since 3.1
29 */
30 public abstract class AbstractSerializableListDecorator<E>
31 extends AbstractListDecorator<E> {
32
33 /** Serialization version */
34 private static final long serialVersionUID = 2684959196747496299L;
35
36 /**
37 * Constructor that wraps (not copies).
38 *
39 * @param list the list to decorate, must not be null
40 * @throws NullPointerException if list is null
41 */
42 protected AbstractSerializableListDecorator(final List<E> list) {
43 super(list);
44 }
45
46 /**
47 * Read the list in using a custom routine.
48 *
49 * @param in the input stream
50 * @throws IOException if an error occurs while reading from the stream
51 * @throws ClassNotFoundException if an object read from the stream can not be loaded
52 */
53 @SuppressWarnings("unchecked")
54 private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {
55 in.defaultReadObject();
56 setCollection((Collection<E>) in.readObject());
57 }
58
59 /**
60 * Write the list out using a custom routine.
61 *
62 * @param out the output stream
63 * @throws IOException if an error occurs while writing to the stream
64 */
65 private void writeObject(final ObjectOutputStream out) throws IOException {
66 out.defaultWriteObject();
67 out.writeObject(decorated());
68 }
69
70 }