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
029 /**
030 * An interceptor which makes a serialized copy of all parameters and return values. This
031 * is useful when testing remote services to ensure that all parameter/return types
032 * are in fact serializable/deserializable.
033 * @since 1.0
034 */
035 public class SerializingInterceptor implements Interceptor
036 {
037 public Object intercept(Invocation invocation) throws Throwable
038 {
039 Object[] arguments = invocation.getArguments();
040 for (int i = 0; i < arguments.length; i++)
041 {
042 arguments[i] = serializedCopy(arguments[i]);
043 }
044 return serializedCopy(invocation.proceed());
045 }
046
047 private Object serializedCopy(Object original)
048 {
049 try
050 {
051 final ByteArrayOutputStream bout = new ByteArrayOutputStream();
052 final ObjectOutputStream oout = new ObjectOutputStream(bout);
053 oout.writeObject(original);
054 oout.close();
055 bout.close();
056 final ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
057 final ObjectInputStream oin = new ObjectInputStream(bin);
058 final Object copy = oin.readObject();
059 oin.close();
060 bin.close();
061 return copy;
062 }
063 catch (IOException e)
064 {
065 throw new RuntimeException( "Unable to make serialized copy of " +
066 original.getClass().getName() + " object.", e );
067 }
068 catch (ClassNotFoundException e)
069 {
070 throw new RuntimeException( "Unable to make serialized copy of " +
071 original.getClass().getName() + " object.", e );
072 }
073 }
074 }