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.kaha;
018    
019    import java.io.DataInput;
020    import java.io.DataOutput;
021    import java.io.IOException;
022    
023    import org.apache.activemq.openwire.OpenWireFormat;
024    import org.apache.activemq.util.ByteSequence;
025    import org.apache.activemq.wireformat.WireFormat;
026    
027    /**
028     * Marshall a Message or a MessageReference
029     * 
030     * 
031     */
032    public 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    }