core/src/main/java/org/apache/carbondata/core/scan/expression/BinaryExpression.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.carbondata.core.scan.expression;

public abstract class BinaryExpression extends Expression {

  private static final long serialVersionUID = 1L;
  protected Expression left;
  protected Expression right;

  public BinaryExpression(Expression left, Expression right) {
    this.left = left;
    this.right = right;
    children.add(left);
    children.add(right);
  }

  public Expression getLeft() {
    return left;
  }

  public Expression getRight() {
    return right;
  }

  @Override
  public void findAndSetChild(Expression oldExpr, Expression newExpr) {
    for (int i = 0; i < children.size(); i++) {
      if (oldExpr.equals(children.get(i))) {
        if (this.left.equals(children.get(i))) {
          this.left = newExpr;
        } else if (this.right.equals(children.get(i))) {
          this.right = newExpr;
        }
        children.remove(i);
        children.add(newExpr);
      }
    }
  }
}