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;
  
  /**
   * Filters are stored in rocksdb and are consulted automatically
   * by rocksdb to decide whether or not to read some
   * information from disk. In many cases, a filter can cut down the
   * number of disk seeks form a handful to a single disk seek per
   * DB::Get() call.
   */
  public abstract class Filter extends RocksObject {
  
    protected Filter(final long nativeHandle) {
      super(nativeHandle);
    }
  
    /**
     * Deletes underlying C++ filter pointer.
     *
     * Note that this function should be called only after all
     * RocksDB instances referencing the filter are closed.
     * Otherwise an undefined behavior will occur.
     */
    @Override
    protected void disposeInternal() {
      disposeInternal(nativeHandle_);
    }
  
    @Override
    protected final native void disposeInternal(final long handle);
  }
  