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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tuscany.common.io.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
/**
* <p/>
* An implementation of an ObjectInputStream that takes a ClassLoader or works
* with the current Thread context ClassLoader.
*/
public class ClassLoaderObjectInputStream extends ObjectInputStream {
protected ClassLoader classLoader;
/**
* Constructor
*
* @param in
* @param classLoader
* @throws IOException
*/
public ClassLoaderObjectInputStream(InputStream in, ClassLoader classLoader) throws IOException {
super(in);
this.classLoader = classLoader;
}
/**
* @see java.io.ObjectInputStream#resolveClass(java.io.ObjectStreamClass)
*/
protected Class resolveClass(final ObjectStreamClass desc) throws IOException, ClassNotFoundException {
final String name = desc.getName();
try {
return (Class) AccessController.doPrivileged(new PrivilegedExceptionAction() {
public Object run() throws ClassNotFoundException, IOException {
try {
return Class.forName(name, false, classLoader);
} catch (ClassNotFoundException e) {
return ClassLoaderObjectInputStream.super.resolveClass(desc);
}
}
});
} catch (PrivilegedActionException ex) {
Exception e = ex.getException();
if (e instanceof ClassNotFoundException) {
throw (ClassNotFoundException) e;
} else if (e instanceof IOException) {
throw (IOException) e;
}
return null;
}
}
}
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