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;
  
  import java.util.SortedMap;
  import java.util.function.Supplier;
  
  /**
   * A two-level concurrent map implementation where the inner map is sorted.
   * Concurrent usage is managed by the outer map.
   *
   * Users can supply the inner sorted map type of their choice.
   *
   * @param <K1> the first key type
   * @param <K2> the second key type
   * @param <V> the value type
   * @param <M> the type for the inner sorted map
   */
  
  public class TwoKeyConcurrentSortedMap<K1, K2, V, M extends SortedMap<K2, V>>
      extends TwoKeyConcurrentMap<K1, K2, V, M> {
    private static final long serialVersionUID = 6753840815921785040L;
  
    /**
     * @param innerMapCreator supplier for the inner map type
     */
    public TwoKeyConcurrentSortedMap(Supplier<M> innerMapCreator) {
      super(innerMapCreator);
    }
  }
  