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.client.file.cache.cuckoofilter;
  
  /**
   * This class represents the type of sliding window.
   */
  public enum SlidingWindowType {
    /**
     * The definition of count-based sliding window from "Sliding Sketches: A Framework using Time
     * Zones for Data * Stream Processing in Sliding Windows" by Gou et al.: Given a data stream S, a
     * count-based sliding window with length N means the union of the last N items.
     *
     */
    COUNT_BASED,
    /**
     * The definition of time-based sliding window from "Sliding Sketches: A Framework using Time
     * Zones for Data Stream Processing in Sliding Windows" by Gou et al.: Given a data stream S, a
     * time-based sliding window with length N means the union of data items which arrive in the last
     * N time units.
     */
    TIME_BASED,
    /**
     * NONE indicates that sliding window model is not used.
     */
    NONE;
  }
  