001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.commons.proxy.interceptor;
019
020 import org.apache.commons.proxy.Interceptor;
021 import org.apache.commons.proxy.Invocation;
022
023 import java.io.ByteArrayInputStream;
024 import java.io.ByteArrayOutputStream;
025 import java.io.IOException;
026 import java.io.ObjectInputStream;
027 import java.io.ObjectOutputStream;
028 import java.io.Serializable;
029
030 /**
031 * An interceptor which makes a serialized copy of all parameters and return values. This
032 * is useful when testing remote services to ensure that all parameter/return types
033 * are in fact serializable/deserializable.
034 *
035 * @since 1.0
036 */
037 public class SerializingInterceptor implements Interceptor, Serializable
038 {
039 //**********************************************************************************************************************
040 // Interceptor Implementation
041 //**********************************************************************************************************************
042
043 public Object intercept( Invocation invocation ) throws Throwable
044 {
045 Object[] arguments = invocation.getArguments();
046 for( int i = 0; i < arguments.length; i++ )
047 {
048 arguments[i] = serializedCopy(arguments[i]);
049 }
050 return serializedCopy(invocation.proceed());
051 }
052
053 //**********************************************************************************************************************
054 // Other Methods
055 //**********************************************************************************************************************
056
057 private Object serializedCopy( Object original )
058 {
059 try
060 {
061 final ByteArrayOutputStream bout = new ByteArrayOutputStream();
062 final ObjectOutputStream oout = new ObjectOutputStream(bout);
063 oout.writeObject(original);
064 oout.close();
065 bout.close();
066 final ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
067 final ObjectInputStream oin = new ObjectInputStream(bin);
068 final Object copy = oin.readObject();
069 oin.close();
070 bin.close();
071 return copy;
072 }
073 catch( IOException e )
074 {
075 throw new RuntimeException("Unable to make serialized copy of " +
076 original.getClass().getName() + " object.", e);
077 }
078 catch( ClassNotFoundException e )
079 {
080 throw new RuntimeException("Unable to make serialized copy of " +
081 original.getClass().getName() + " object.", e);
082 }
083 }
084 }