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.fusesource.hawtbuf.codec; 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 public class ObjectCodec<T> extends VariableCodec<T> { 032 033 public void encode(Object object, DataOutput dataOut) throws IOException { 034 ByteArrayOutputStream bytesOut = new ByteArrayOutputStream(); 035 ObjectOutputStream objectOut = new ObjectOutputStream(bytesOut); 036 objectOut.writeObject(object); 037 objectOut.close(); 038 byte[] data = bytesOut.toByteArray(); 039 dataOut.writeInt(data.length); 040 dataOut.write(data); 041 } 042 043 public T decode(DataInput dataIn) throws IOException { 044 int size = dataIn.readInt(); 045 byte[] data = new byte[size]; 046 dataIn.readFully(data); 047 ByteArrayInputStream bytesIn = new ByteArrayInputStream(data); 048 ObjectInputStream objectIn = new ObjectInputStream(bytesIn); 049 try { 050 return (T) objectIn.readObject(); 051 } catch (ClassNotFoundException e) { 052 throw createIOException(e.getMessage(), e); 053 } 054 } 055 056 private static IOException createIOException(String message, Throwable cause) { 057 IOException answer = new IOException(message); 058 answer.initCause(cause); 059 return answer; 060 } 061 062 }