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.set;
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.Set;
24
25 /**
26 * Serializable subclass of AbstractSetDecorator.
27 *
28 * @param <E> the type of the elements in this set
29 * @since 3.1
30 */
31 public abstract class AbstractSerializableSetDecorator<E>
32 extends AbstractSetDecorator<E> {
33
34 /** Serialization version */
35 private static final long serialVersionUID = 1229469966212206107L;
36
37 /**
38 * Constructs a new instance.
39 *
40 * @param set the list to decorate, must not be null
41 * @throws NullPointerException if set is null
42 */
43 protected AbstractSerializableSetDecorator(final Set<E> set) {
44 super(set);
45 }
46
47 /**
48 * Read the set in using a custom routine.
49 *
50 * @param in the input stream
51 * @throws IOException if an error occurs while reading from the stream
52 * @throws ClassNotFoundException if an object read from the stream can not be loaded
53 */
54 @SuppressWarnings("unchecked")
55 private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {
56 in.defaultReadObject();
57 setCollection((Collection<E>) in.readObject());
58 }
59
60 /**
61 * Write the set out using a custom routine.
62 *
63 * @param out the output stream
64 * @throws IOException if an error occurs while writing to the stream
65 */
66 private void writeObject(final ObjectOutputStream out) throws IOException {
67 out.defaultWriteObject();
68 out.writeObject(decorated());
69 }
70
71 }