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    package org.apache.activemq.kaha;
018    
019    import java.io.ByteArrayInputStream;
020    import java.io.ByteArrayOutputStream;
021    import java.io.DataInput;
022    import java.io.DataOutput;
023    import java.io.IOException;
024    import java.io.ObjectInputStream;
025    import java.io.ObjectOutputStream;
026    
027    /**
028     * Implementation of a Marshaller for Objects
029     * 
030     * 
031     */
032    public class ObjectMarshaller implements Marshaller {
033    
034        /**
035         * Write the payload of this entry to the RawContainer
036         * 
037         * @param object
038         * @param dataOut
039         * @throws IOException
040         */
041        public void writePayload(Object object, DataOutput dataOut) throws IOException {
042            ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
043            ObjectOutputStream objectOut = new ObjectOutputStream(bytesOut);
044            objectOut.writeObject(object);
045            objectOut.close();
046            byte[] data = bytesOut.toByteArray();
047            dataOut.writeInt(data.length);
048            dataOut.write(data);
049        }
050    
051        /**
052         * Read the entry from the RawContainer
053         * 
054         * @param dataIn
055         * @return unmarshalled object
056         * @throws IOException
057         */
058        public Object readPayload(DataInput dataIn) throws IOException {
059            int size = dataIn.readInt();
060            byte[] data = new byte[size];
061            dataIn.readFully(data);
062            ByteArrayInputStream bytesIn = new ByteArrayInputStream(data);
063            ObjectInputStream objectIn = new ObjectInputStream(bytesIn);
064            try {
065                return objectIn.readObject();
066            } catch (ClassNotFoundException e) {
067                throw new IOException(e.getMessage());
068            }
069        }
070    }