org.rocksdb.ColumnFamilyMetaData Maven / Gradle / Ivy
// 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);
}
}