content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  package com.aliyun.odps.table.distribution;
  
  import java.util.List;
  import java.util.Optional;
  
  /**
   * A distribution for clustered table.
   */
  public class ClusteredDistribution implements Distribution {
  
      private final List<String> clusterKeys;
      private final Type clusterType;
      private final int bucketsNumber;
  
      public ClusteredDistribution(List<String> clusterKeys, Type clusterType, int bucketsNumber) {
          this.clusterKeys = clusterKeys;
          this.clusterType = clusterType;
          this.bucketsNumber = bucketsNumber;
      }
  
      public List<String> getClusterKeys() {
          return clusterKeys;
      }
  
      public Optional<Integer> getBucketsNumber() {
          return bucketsNumber > 0 ?
                  Optional.of(bucketsNumber) : Optional.empty();
      }
  
      @Override
      public Type getType() {
          return clusterType;
      }
  
  }
  