org.rocksdb.ColumnFamilyMetaData Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rocksdbjni Show documentation

RocksDB fat jar that contains .so files for linux32 and linux64 (glibc and musl-libc), jnilib files for Mac OSX, and a .dll for Windows x64.

The newest version!

// 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;

import java.util.Arrays;
import java.util.List;

/**
 * The metadata that describes a column family.
 */
public class ColumnFamilyMetaData {
  private final long size;
  private final long fileCount;
  private final byte[] name;
  private final LevelMetaData[] levels;

  /**
   * Called from JNI C++
   */
  private ColumnFamilyMetaData(
      final long size,
      final long fileCount,
      final byte[] name,
      final LevelMetaData[] levels) {
    this.size = size;
    this.fileCount = fileCount;
    this.name = name;
    this.levels = levels;
  }

  /**
   * The size of this column family in bytes, which is equal to the sum of
   * the file size of its {@link #levels()}.
   *
   * @return the size of this column family
   */
  public long size() {
    return size;
  }

  /**
   * The number of files in this column family.
   *
   * @return the number of files
   */
  public long fileCount() {
    return fileCount;
  }

  /**
   * The name of the column family.
   *
   * @return the name
   */
  public byte[] name() {
    return name;
  }

  /**
   * The metadata of all levels in this column family.
   *
   * @return the levels metadata
   */
  public List levels() {
    return Arrays.asList(levels);
  }
}