ceph/src/rocksdb/java/src/main/java/org/rocksdb/LevelMetaData.java

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 package org.rocksdb;
   7
   8 import java.util.Arrays;
   9 import java.util.List;
  10
  11 /**
  12  * The metadata that describes a level.
  13  */
  14 public class LevelMetaData {
  15   private final int level;
  16   private final long size;
  17   private final SstFileMetaData[] files;
  18
  19   /**
  20    * Called from JNI C++
  21    */
  22   private LevelMetaData(final int level, final long size,
  23       final SstFileMetaData[] files) {
  24     this.level = level;
  25     this.size = size;
  26     this.files = files;
  27   }
  28
  29   /**
  30    * The level which this meta data describes.
  31    *
  32    * @return the level
  33    */
  34   public int level() {
  35     return level;
  36   }
  37
  38   /**
  39    * The size of this level in bytes, which is equal to the sum of
  40    * the file size of its {@link #files()}.
  41    *
  42    * @return the size
  43    */
  44   public long size() {
  45     return size;
  46   }
  47
  48   /**
  49    * The metadata of all sst files in this level.
  50    *
  51    * @return the metadata of the files
  52    */
  53   public List<SstFileMetaData> files() {
  54     return Arrays.asList(files);
  55   }
  56 }