1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.trinidad.util;
20
21 import java.io.Serializable;
22
23 /**
24 * Holds an unserializable value in a transient variable so that
25 * unserializable Objects can be safely placed in distributed Sessions
26 * without blowing up. Users should expect that getValue() will return
27 * <code>null</code> if the class has been serialized/de-serialized
28 */
29 public final class TransientHolder<T> implements Serializable
30 {
31 private TransientHolder(T value)
32 {
33 _value = value;
34 }
35
36 public static <T> TransientHolder<T> newTransientHolder(T held)
37 {
38 return new TransientHolder<T>(held);
39 }
40
41 public T getValue()
42 {
43 return _value;
44 }
45
46 private final transient T _value;
47 private static final long serialVersionUID = 1L;
48 }