content: // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
  //  This source code is licensed under both the GPLv2 (found in the
  //  COPYING file in the root directory) and Apache 2.0 License
  //  (found in the LICENSE.Apache file in the root directory).
  
  package org.rocksdb;
  
  /**
   * EncodingType
   *
   * <p>The value will determine how to encode keys
   * when writing to a new SST file.</p>
   *
   * <p>This value will be stored
   * inside the SST file which will be used when reading from
   * the file, which makes it possible for users to choose
   * different encoding type when reopening a DB. Files with
   * different encoding types can co-exist in the same DB and
   * can be read.</p>
   */
  public enum EncodingType {
    /**
     * Always write full keys without any special encoding.
     */
    kPlain((byte) 0),
    /**
     * <p>Find opportunity to write the same prefix once for multiple rows.
     * In some cases, when a key follows a previous key with the same prefix,
     * instead of writing out the full key, it just writes out the size of the
     * shared prefix, as well as other bytes, to save some bytes.</p>
     *
     * <p>When using this option, the user is required to use the same prefix
     * extractor to make sure the same prefix will be extracted from the same key.
     * The Name() value of the prefix extractor will be stored in the file. When
     * reopening the file, the name of the options.prefix_extractor given will be
     * bitwise compared to the prefix extractors stored in the file. An error
     * will be returned if the two don't match.</p>
     */
    kPrefix((byte) 1);
  
    /**
     * Returns the byte value of the enumerations value
     *
     * @return byte representation
     */
    public byte getValue() {
      return value_;
    }
  
    private EncodingType(byte value) {
      value_ = value;
    }
  
    private final byte value_;
  }
  