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.kaha;
018
019import java.io.DataInput;
020import java.io.DataOutput;
021import java.io.IOException;
022
023import org.apache.activemq.openwire.OpenWireFormat;
024import org.apache.activemq.util.ByteSequence;
025import org.apache.activemq.wireformat.WireFormat;
026
027/**
028 * Marshall a Message or a MessageReference
029 * 
030 * 
031 */
032public class CommandMarshaller implements Marshaller<Object> {
033
034    private WireFormat wireFormat;
035
036    public CommandMarshaller(WireFormat wireFormat) {
037        this.wireFormat = wireFormat;
038
039    }
040
041    public CommandMarshaller() {
042        this(new OpenWireFormat());
043    }
044
045    public void writePayload(Object object, DataOutput dataOut) throws IOException {
046        ByteSequence packet = wireFormat.marshal(object);
047        dataOut.writeInt(packet.length);
048        dataOut.write(packet.data, packet.offset, packet.length);
049    }
050
051    public Object readPayload(DataInput dataIn) throws IOException {
052        int size = dataIn.readInt();
053        byte[] data = new byte[size];
054        dataIn.readFully(data);
055        return wireFormat.unmarshal(new ByteSequence(data));
056    }
057}