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    1   /**
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    * Unless required by applicable law or agreed to in writing, software
   12    * distributed under the License is distributed on an "AS IS" BASIS,
   13    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    * See the License for the specific language governing permissions and
   15    * limitations under the License.
   16    */
   17   package org.apache.activemq.kaha;
   18   
   19   import java.io.DataInput;
   20   import java.io.DataOutput;
   21   import java.io.IOException;
   22   import org.apache.activemq.command.Message;
   23   import org.apache.activemq.util.ByteSequence;
   24   import org.apache.activemq.wireformat.WireFormat;
   25   
   26   /**
   27    * Implementation of a Marshaller for MessageIds
   28    * 
   29    * @version $Revision: 1.2 $
   30    */
   31   public class MessageMarshaller implements Marshaller<Message> {
   32   
   33       private WireFormat wireFormat;
   34   
   35       /**
   36        * Constructor
   37        * 
   38        * @param wireFormat
   39        */
   40       public MessageMarshaller(WireFormat wireFormat) {
   41           this.wireFormat = wireFormat;
   42       }
   43   
   44       /**
   45        * Write the payload of this entry to the RawContainer
   46        * 
   47        * @param message
   48        * @param dataOut
   49        * @throws IOException
   50        */
   51       public void writePayload(Message message, DataOutput dataOut) throws IOException {
   52           ByteSequence packet = wireFormat.marshal(message);
   53           dataOut.writeInt(packet.length);
   54           dataOut.write(packet.data, packet.offset, packet.length);
   55       }
   56   
   57       /**
   58        * Read the entry from the RawContainer
   59        * 
   60        * @param dataIn
   61        * @return unmarshalled object
   62        * @throws IOException
   63        */
   64       public Message readPayload(DataInput dataIn) throws IOException {
   65           int size = dataIn.readInt();
   66           byte[] data = new byte[size];
   67           dataIn.readFully(data);
   68           return (Message)wireFormat.unmarshal(new ByteSequence(data));
   69       }
   70   }

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