/**
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.hadoop.hbase.codec;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.Cell;
  import org.apache.hadoop.hbase.CellUtil;
  import org.apache.hadoop.hbase.HBaseInterfaceAudience;
  import org.apache.hadoop.hbase.util.Bytes;
  
  /**
   * Basic Cell codec that just writes out all the individual elements of a Cell including the tags.
   * Uses ints delimiting all lengths. Profligate. Needs tune up.
   * <b>Use this Codec only at server side.</b>
   */
  @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
  public class CellCodecWithTags implements Codec {
    static class CellEncoder extends BaseEncoder {
      CellEncoder(final OutputStream out) {
        super(out);
      }
  
      @Override
      public void write(Cell cell) throws IOException {
        checkFlushed();
        // Row
        write(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength());
        // Column family
        write(cell.getFamilyArray(), cell.getFamilyOffset(), cell.getFamilyLength());
        // Qualifier
        write(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength());
        // Version
        this.out.write(Bytes.toBytes(cell.getTimestamp()));
        // Type
        this.out.write(cell.getTypeByte());
        // Value
        write(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());
        // Tags
        write(cell.getTagsArray(), cell.getTagsOffset(), cell.getTagsLength());
        // MvccVersion
        this.out.write(Bytes.toBytes(cell.getMvccVersion()));
      }
  
      /**
       * Write int length followed by array bytes.
       *
       * @param bytes
       * @param offset
       * @param length
       * @throws IOException
       */
      private void write(final byte[] bytes, final int offset, final int length) throws IOException {
        this.out.write(Bytes.toBytes(length));
        this.out.write(bytes, offset, length);
      }
    }
  
    static class CellDecoder extends BaseDecoder {
      public CellDecoder(final InputStream in) {
        super(in);
      }
  
      @Override
      protected Cell parseCell() throws IOException {
        byte[] row = readByteArray(this.in);
        byte[] family = readByteArray(in);
        byte[] qualifier = readByteArray(in);
        byte[] longArray = new byte[Bytes.SIZEOF_LONG];
        IOUtils.readFully(this.in, longArray);
        long timestamp = Bytes.toLong(longArray);
        byte type = (byte) this.in.read();
        byte[] value = readByteArray(in);
        byte[] tags = readByteArray(in);
        // Read memstore version
        byte[] memstoreTSArray = new byte[Bytes.SIZEOF_LONG];
        IOUtils.readFully(this.in, memstoreTSArray);
        long memstoreTS = Bytes.toLong(memstoreTSArray);
        return CellUtil.createCell(row, family, qualifier, timestamp, type, value, tags, memstoreTS);
      }
 
     /**
      * @return Byte array read from the stream.
      * @throws IOException
      */
     private byte[] readByteArray(final InputStream in) throws IOException {
       byte[] intArray = new byte[Bytes.SIZEOF_INT];
       IOUtils.readFully(in, intArray);
       int length = Bytes.toInt(intArray);
       byte[] bytes = new byte[length];
       IOUtils.readFully(in, bytes);
       return bytes;
     }
   }
 
   @Override
   public Decoder getDecoder(InputStream is) {
     return new CellDecoder(is);
   }
 
   @Override
   public Encoder getEncoder(OutputStream os) {
     return new CellEncoder(os);
   }
 }