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2 * Licensed to the Apache Software Foundation (ASF) under one *
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5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
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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. *
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19
20
21
22 package org.apache.james.util.io;
23
24 import java.io.IOException;
25 import java.io.InputStream;
26 import java.io.ObjectInputStream;
27 import java.io.ObjectStreamClass;
28 import java.io.StreamCorruptedException;
29
30 /**
31 * A special ObjectInputStream to handle highly transient classes hosted
32 * by Avalon components that are juggling many classloaders.
33 *
34 * @version $Revision: 464742 $ $Date: 2006-10-17 00:53:00 +0100 (Tue, 17 Oct 2006) $
35 */
36 public class ClassLoaderObjectInputStream
37 extends ObjectInputStream
38 {
39 private ClassLoader m_classLoader;
40
41 public ClassLoaderObjectInputStream( final ClassLoader classLoader,
42 final InputStream inputStream )
43 throws IOException, StreamCorruptedException
44 {
45 super( inputStream );
46 m_classLoader = classLoader;
47 }
48
49 protected Class resolveClass( final ObjectStreamClass objectStreamClass )
50 throws IOException, ClassNotFoundException
51 {
52 final Class clazz =
53 Class.forName( objectStreamClass.getName(), false, m_classLoader );
54
55 if( null != clazz )
56 {
57 return clazz; // the classloader knows of the class
58 }
59 else
60 {
61 // classloader knows not of class, let the super classloader do it
62 return super.resolveClass( objectStreamClass );
63 }
64 }
65 }