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.order;
  
  import java.io.Serializable;
  import java.util.Objects;
  
  /**
   * Represents a sort order in a specific column.
   */
  public class SortOrder implements Serializable {
  
      private final String name;
      private final SortDirection direction;
      private final NullOrdering nullOrdering;
  
      public SortOrder(String name,
                       SortDirection direction,
                       NullOrdering nullOrdering) {
          this.name = name;
          this.direction = direction;
          this.nullOrdering = nullOrdering;
      }
  
      /**
       * Returns the sort column name.
       */
      public String name() {
          return name;
      }
  
      /**
       * Returns the sort direction.
       */
      public SortDirection direction() {
          return direction;
      }
  
      /**
       * Returns the null ordering.
       */
      public NullOrdering nullOrdering() {
          return nullOrdering;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
          SortOrder that = (SortOrder) o;
          return Objects.equals(name, that.name)
                  && Objects.equals(direction, that.direction)
                  && Objects.equals(nullOrdering, that.nullOrdering);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(name, direction, nullOrdering);
      }
  }
  