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