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.kahadb.util;
018    
019    import java.io.DataInput;
020    import java.io.DataOutput;
021    import java.io.IOException;
022    
023    /**
024     * Implementation of a Marshaller for byte arrays
025     * 
026     * @version $Revision: 816280 $
027     */
028    public class BytesMarshaller implements Marshaller<byte[]> {
029    
030        public void writePayload(byte[] data, DataOutput dataOut) throws IOException {
031            dataOut.writeInt(data.length);
032            dataOut.write(data);
033        }
034    
035        public byte[] readPayload(DataInput dataIn) throws IOException {
036            int size = dataIn.readInt();
037            byte[] data = new byte[size];
038            dataIn.readFully(data);
039            return data;
040        }
041        
042        public int getFixedSize() {
043            return -1;
044        }
045    
046        public byte[] deepCopy(byte[] source) {
047            byte []rc = new byte[source.length];
048            System.arraycopy(source, 0, rc, 0, source.length);
049            return rc;
050        }
051    
052        public boolean isDeepCopySupported() {
053            return true;
054        }
055    }