org.rocksdb.ColumnFamilyDescriptor 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;

/**
 * Describes a column family with a
 * name and respective Options.
 */
public class ColumnFamilyDescriptor {

  /**
   * Creates a new Column Family using a name and default
   * options,
   *
   * @param columnFamilyName name of column family.
   * @since 3.10.0
   */
  public ColumnFamilyDescriptor(final byte[] columnFamilyName) {
    this(columnFamilyName, new ColumnFamilyOptions());
  }

  /**
   * Creates a new Column Family using a name and custom
   * options.
   *
   * @param columnFamilyName name of column family.
   * @param columnFamilyOptions options to be used with
   *     column family.
   * @since 3.10.0
   */
  @SuppressWarnings("PMD.ArrayIsStoredDirectly")
  public ColumnFamilyDescriptor(
      final byte[] columnFamilyName, final ColumnFamilyOptions columnFamilyOptions) {
    columnFamilyName_ = columnFamilyName;
    columnFamilyOptions_ = columnFamilyOptions;
  }

  /**
   * Retrieve name of column family.
   *
   * @return column family name.
   * @since 3.10.0
   */
  @SuppressWarnings("PMD.MethodReturnsInternalArray")
  public byte[] getName() {
    return columnFamilyName_;
  }

  /**
   * Retrieve assigned options instance.
   *
   * @return Options instance assigned to this instance.
   */
  public ColumnFamilyOptions getOptions() {
    return columnFamilyOptions_;
  }

  @Override
  public boolean equals(final Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    final ColumnFamilyDescriptor that = (ColumnFamilyDescriptor) o;
    return Arrays.equals(columnFamilyName_, that.columnFamilyName_)
            && columnFamilyOptions_.nativeHandle_ == that.columnFamilyOptions_.nativeHandle_;
  }

  @Override
  public int hashCode() {
    int result = (int) (columnFamilyOptions_.nativeHandle_ ^ (columnFamilyOptions_.nativeHandle_ >>> 32));
    result = 31 * result + Arrays.hashCode(columnFamilyName_);
    return result;
  }

  private final byte[] columnFamilyName_;
  private final ColumnFamilyOptions columnFamilyOptions_;
}