/**
    * 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.types;
  
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.classification.InterfaceStability;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.apache.hadoop.hbase.util.Order;
  import org.apache.hadoop.hbase.util.PositionedByteRange;
  
  /**
   * An {@code DataType} for interacting with values encoded using
   * {@link Bytes#putByte(byte[], int, byte)}. Intended to make it easier to
   * transition away from direct use of {@link Bytes}.
   * @see Bytes#putByte(byte[], int, byte)
   */
  @InterfaceAudience.Public
  @InterfaceStability.Evolving
  public class RawByte implements DataType<Byte> {
  
    @Override
    public boolean isOrderPreserving() { return false; }
  
    @Override
    public Order getOrder() { return null; }
  
    @Override
    public boolean isNullable() { return false; }
  
    @Override
    public boolean isSkippable() { return true; }
  
    @Override
    public int encodedLength(Byte val) { return Bytes.SIZEOF_BYTE; }
  
    @Override
    public Class<Byte> encodedClass() { return Byte.class; }
  
    @Override
    public int skip(PositionedByteRange src) {
      src.setPosition(src.getPosition() + Bytes.SIZEOF_BYTE);
      return Bytes.SIZEOF_BYTE;
    }
  
    @Override
    public Byte decode(PositionedByteRange src) {
      byte val = src.getBytes()[src.getOffset() + src.getPosition()];
      skip(src);
      return val;
    }
  
    @Override
    public int encode(PositionedByteRange dst, Byte val) {
      Bytes.putByte(dst.getBytes(), dst.getOffset() + dst.getPosition(), val);
      return skip(dst);
    }
  
    /**
     * Read a {@code byte} value from the buffer {@code buff}.
     */
    public byte decodeByte(byte[] buff, int offset) {
      return buff[offset];
    }
  
    /**
     * Write instance {@code val} into buffer {@code buff}.
     */
    public int encodeByte(byte[] buff, int offset, byte val) {
      return Bytes.putByte(buff, offset, val);
    }
  }