1 package org.apache.fulcrum.factory.utils;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.InputStream;
23 import java.io.IOException;
24 import java.io.ObjectInputStream;
25 import java.io.ObjectStreamClass;
26
27 /**
28 * A deserialization stream for a specific class loader context.
29 *
30 * @author <a href="mailto:ilkka.priha@simsoft.fi">Ilkka Priha</a>
31 * @version $Id$
32 */
33 public class ObjectInputStreamForContext extends ObjectInputStream
34 {
35 /**
36 * The class loader of the context.
37 */
38 private ClassLoader classLoader;
39
40 /**
41 * Required to make satisfy the proxy methods
42 *
43 * @throws IOException Generic exception
44 */
45 public ObjectInputStreamForContext()
46 throws IOException
47 {
48 }
49
50 /**
51 * This method will construct a new object stream for a context.
52 *
53 * @param in the serialized input stream.
54 * @param loader the class loader of the context.
55 * @throws IOException on errors.
56 */
57 public ObjectInputStreamForContext(InputStream in,
58 ClassLoader loader)
59 throws IOException
60 {
61 super(in);
62 classLoader = loader;
63 }
64
65 /**
66 * {@link java.io.ObjectInputStream#resolveClass(ObjectStreamClass)}
67 *
68 * @param v ObjectStreamClass to resolve
69 * @return {@inheritDoc} class to resolve
70 * @throws IOException if object stream not found
71 * @throws ClassNotFoundException if class not found
72 */
73 protected Class<?> resolveClass(ObjectStreamClass v)
74 throws IOException,
75 ClassNotFoundException
76 {
77 return classLoader == null ?
78 super.resolveClass(v) : classLoader.loadClass(v.getName());
79 }
80 }