logical/src/main/java/org/apache/drill/common/logical/data/JoinCondition.java

/*
 * 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 org.apache.drill.common.logical.data;

import org.apache.drill.common.expression.LogicalExpression;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

public class JoinCondition {
  private final String relationship;
  private final LogicalExpression left;
  private final LogicalExpression right;

  @JsonCreator
  public JoinCondition(@JsonProperty("relationship") String relationship,
      @JsonProperty("left") LogicalExpression left, @JsonProperty("right") LogicalExpression right) {
    super();
    this.relationship = relationship;
    this.left = left;
    this.right = right;
  }

  public String getRelationship() {
    return relationship;
  }

  public LogicalExpression getLeft() {
    return left;
  }

  public LogicalExpression getRight() {
    return right;
  }

  public JoinCondition flip(){
    return new JoinCondition(relationship, right, left);
  }

}