content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.collections;
  
  /**
   * An interface of BitSet supports get/set/clear.
   */
  public interface BitSet {
  
    /**
     * @param index the index of the bit to get
     * @return the bit value of the specified index
     */
    boolean get(int index);
  
    /**
     * Sets the bit at the specified index to {@code true}.
     *
     * @param index the index of the bit to be set
     */
    void set(int index);
  
    /**
     * Sets the bit specified by the index to {@code false}.
     *
     * @param index the index of the bit to be cleared
     */
    void clear(int index);
  
    /**
     * @return the number of bits currently in this bit set
     */
    int size();
  }
  