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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.kahadb.util;
   18   
   19   import java.io.ByteArrayInputStream;
   20   import java.io.ByteArrayOutputStream;
   21   import java.io.DataInput;
   22   import java.io.DataOutput;
   23   import java.io.IOException;
   24   import java.io.ObjectInputStream;
   25   import java.io.ObjectOutputStream;
   26   
   27   /**
   28    * Implementation of a Marshaller for Objects
   29    * 
   30    * @version $Revision: 816280 $
   31    */
   32   public class ObjectMarshaller extends VariableMarshaller<Object> {
   33   
   34       public void writePayload(Object object, DataOutput dataOut) throws IOException {
   35           ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
   36           ObjectOutputStream objectOut = new ObjectOutputStream(bytesOut);
   37           objectOut.writeObject(object);
   38           objectOut.close();
   39           byte[] data = bytesOut.toByteArray();
   40           dataOut.writeInt(data.length);
   41           dataOut.write(data);
   42       }
   43   
   44       public Object readPayload(DataInput dataIn) throws IOException {
   45           int size = dataIn.readInt();
   46           byte[] data = new byte[size];
   47           dataIn.readFully(data);
   48           ByteArrayInputStream bytesIn = new ByteArrayInputStream(data);
   49           ObjectInputStream objectIn = new ObjectInputStream(bytesIn);
   50           try {
   51               return objectIn.readObject();
   52           } catch (ClassNotFoundException e) {
   53               throw new IOException(e.getMessage());
   54           }
   55       }
   56       
   57   }

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