@Override
  public Class<? extends Writable> getSerializedClass() {
    return BytesWritable.class;
  }
Class to convert bytes writable containing a protobuf message to hive formats.
@see ProtobufSerDe
ql/src/java/org/apache/hadoop/hive/ql/io/protobuf/ProtobufBytesWritableSerDe.java