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.ir.planner.type;
  
  import com.alibaba.graphscope.common.ir.rel.metadata.glogue.pattern.PatternDirection;
  
  import java.util.Objects;
  
  public class EdgeDataKey implements DataKey {
      private final int lowOrderId;
      private final int highOrderId;
      private final PatternDirection direction;
  
      public EdgeDataKey(int orderId1, int orderId2, PatternDirection direction) {
          if (orderId1 <= orderId2) {
              this.lowOrderId = orderId1;
              this.highOrderId = orderId2;
              this.direction = direction;
          } else {
              this.lowOrderId = orderId2;
              this.highOrderId = orderId1;
              this.direction = revert(direction);
          }
      }
  
      public PatternDirection getDirection() {
          return direction;
      }
  
      public int getLowOrderId() {
          return lowOrderId;
      }
  
      public int getHighOrderId() {
          return highOrderId;
      }
  
      private PatternDirection revert(PatternDirection direction) {
          switch (direction) {
              case IN:
                  return PatternDirection.OUT;
              case OUT:
                  return PatternDirection.IN;
              case BOTH:
              default:
                  return PatternDirection.BOTH;
          }
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          EdgeDataKey edgeKey = (EdgeDataKey) o;
          return lowOrderId == edgeKey.lowOrderId
                  && highOrderId == edgeKey.highOrderId
                  && direction == edgeKey.direction;
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(lowOrderId, highOrderId, direction);
      }
  
      @Override
      public String toString() {
          return "EdgeDataKey{"
                  + "lowOrderId="
                  + lowOrderId
                  + ", highOrderId="
                  + highOrderId
                  + ", direction="
                  + direction
                  + '}';
      }
  }
  