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.wireformat;
018    
019    import java.io.DataInput;
020    import java.io.DataInputStream;
021    import java.io.DataOutput;
022    import java.io.DataOutputStream;
023    import java.io.IOException;
024    import java.io.InputStream;
025    import java.io.ObjectOutputStream;
026    import java.io.OutputStream;
027    
028    import org.apache.activemq.util.ByteArrayInputStream;
029    import org.apache.activemq.util.ByteArrayOutputStream;
030    import org.apache.activemq.util.ByteSequence;
031    import org.apache.activemq.util.ClassLoadingAwareObjectInputStream;
032    
033    /**
034     * A simple implementation which uses Object Stream serialization.
035     * 
036     * 
037     */
038    public 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    }