Class BinaryPrefixComparator

src/BinaryPrefixComparator.java:39–95

A binary comparator used in comparison filters. Compares byte arrays lexicographically up to the length of the provided byte array. @since 1.6

 * @since 1.6
 */
public final class BinaryPrefixComparator extends FilterComparator {

  private static final byte[] NAME =
      Bytes.UTF8("org.apache.hadoop.hbase.filter.BinaryPrefixComparator");
  private static final byte CODE = 47;

  private final byte[] value;

  public BinaryPrefixComparator(byte[] value) {
    this.value = value;
  }

  public byte[] value() {
    return value.clone();
  }

  @Override
  byte[] name() {
    return NAME;
  }

  @Override
  ComparatorPB.Comparator toProtobuf() {
    ByteString byte_string = ComparatorPB
        .BinaryPrefixComparator
        .newBuilder()
        .setComparable(
            ComparatorPB
                .ByteArrayComparable
                .newBuilder()
                .setValue(Bytes.wrap(value)))
        .build()
        .toByteString();
    return super.toProtobuf(byte_string);
  }

  @Override
  void serializeOld(ChannelBuffer buf) {
    super.serializeOld(buf);              // super.predictSerializedSize()
    // Write class code
    buf.writeByte(CODE);                  // 1
    // Write value
    HBaseRpc.writeByteArray(buf, value);  // 3 + value.length
  }

  @Override
  int predictSerializedSize() {
    return super.predictSerializedSize() + 1 + 3 + value.length;
  }

  @Override
  public String toString() {
    return String.format("%s(%s)",
        getClass().getSimpleName(),
        Bytes.pretty(value));
  }
}