content: /*
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * Licensed 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.alibaba.graphscope.common.intermediate.operator;
  
  import java.util.Optional;
  
  public class OrderOp extends InterOpBase {
      // List of pair<var, orderOpt>
      private Optional<OpArg> orderVarWithOrder;
  
      // top k
      private Optional<OpArg> lower;
  
      private Optional<OpArg> upper;
  
      public OrderOp() {
          super();
          this.orderVarWithOrder = Optional.empty();
          this.lower = Optional.empty();
          this.upper = Optional.empty();
      }
  
      public Optional<OpArg> getOrderVarWithOrder() {
          return orderVarWithOrder;
      }
  
      public void setOrderVarWithOrder(OpArg orderVarWithOrder) {
          this.orderVarWithOrder = Optional.of(orderVarWithOrder);
      }
  
      public Optional<OpArg> getLower() {
          return lower;
      }
  
      public void setLower(OpArg lower) {
          this.lower = Optional.of(lower);
      }
  
      public Optional<OpArg> getUpper() {
          return upper;
      }
  
      public void setUpper(OpArg upper) {
          this.upper = Optional.of(upper);
      }
  }
  