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 */ 017package org.apache.activemq.wireformat; 018 019import java.io.DataInput; 020import java.io.DataInputStream; 021import java.io.DataOutput; 022import java.io.DataOutputStream; 023import java.io.IOException; 024import java.io.InputStream; 025import java.io.ObjectOutputStream; 026import java.io.OutputStream; 027 028import org.apache.activemq.util.ByteArrayInputStream; 029import org.apache.activemq.util.ByteArrayOutputStream; 030import org.apache.activemq.util.ByteSequence; 031import org.apache.activemq.util.ClassLoadingAwareObjectInputStream; 032 033/** 034 * A simple implementation which uses Object Stream serialization. 035 * 036 * 037 */ 038public class ObjectStreamWireFormat implements WireFormat { 039 040 public ByteSequence marshal(Object command) throws IOException { 041 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 042 DataOutputStream ds = new DataOutputStream(baos); 043 marshal(command, ds); 044 ds.close(); 045 return baos.toByteSequence(); 046 } 047 048 public Object unmarshal(ByteSequence packet) throws IOException { 049 return unmarshal(new DataInputStream(new ByteArrayInputStream(packet))); 050 } 051 052 public void marshal(Object command, DataOutput ds) throws IOException { 053 ObjectOutputStream out = new ObjectOutputStream((OutputStream)ds); 054 out.writeObject(command); 055 out.flush(); 056 out.reset(); 057 } 058 059 public Object unmarshal(DataInput ds) throws IOException { 060 try { 061 ClassLoadingAwareObjectInputStream in = new ClassLoadingAwareObjectInputStream((InputStream)ds); 062 Object command; 063 command = in.readObject(); 064 in.close(); 065 return command; 066 } catch (ClassNotFoundException e) { 067 throw (IOException)new IOException("unmarshal failed: " + e).initCause(e); 068 } 069 } 070 071 public void setVersion(int version) { 072 } 073 074 public int getVersion() { 075 return 0; 076 } 077 078}