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;
  
  /**
   * MemTableConfig is used to config the internal mem-table of a RocksDB.
   * It is required for each memtable to have one such sub-class to allow
   * Java developers to use it.
   *
   * To make a RocksDB to use a specific MemTable format, its associated
   * MemTableConfig should be properly set and passed into Options
   * via Options.setMemTableFactory() and open the db using that Options.
   *
   * @see Options
   */
  public abstract class MemTableConfig {
    /**
     * This function should only be called by Options.setMemTableConfig(),
     * which will create a c++ shared-pointer to the c++ MemTableRepFactory
     * that associated with the Java MemTableConfig.
     *
     * @see Options#setMemTableConfig(MemTableConfig)
     *
     * @return native handle address to native memory table instance.
     */
    abstract protected long newMemTableFactoryHandle();
  }
  