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 org.apache.calcite.linq4j.tree;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.lang.reflect.Type;
  import java.util.Objects;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Represents an expression that has a ternary operator.
   */
  public class TernaryExpression extends Expression {
    public final Expression expression0;
    public final Expression expression1;
    public final Expression expression2;
  
    TernaryExpression(ExpressionType nodeType, Type type, Expression expression0,
        Expression expression1, Expression expression2) {
      super(nodeType, type);
      this.expression0 = requireNonNull(expression0, "expression0");
      this.expression1 = requireNonNull(expression1, "expression1");
      this.expression2 = requireNonNull(expression2, "expression2");
    }
  
    @Override public Expression accept(Shuttle shuttle) {
      shuttle = shuttle.preVisit(this);
      Expression expression0 = this.expression0.accept(shuttle);
      Expression expression1 = this.expression1.accept(shuttle);
      Expression expression2 = this.expression2.accept(shuttle);
      return shuttle.visit(this, expression0, expression1, expression2);
    }
  
    @Override public <R> R accept(Visitor<R> visitor) {
      return visitor.visit(this);
    }
  
    @Override void accept(ExpressionWriter writer, int lprec, int rprec) {
      if (writer.requireParentheses(this, lprec, rprec)) {
        return;
      }
      expression0.accept(writer, lprec, nodeType.lprec);
      writer.append(nodeType.op);
      expression1.accept(writer, nodeType.rprec, nodeType.lprec);
      writer.append(nodeType.op2);
      expression2.accept(writer, nodeType.rprec, rprec);
    }
  
    @Override public boolean equals(@Nullable Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      if (!super.equals(o)) {
        return false;
      }
  
      TernaryExpression that = (TernaryExpression) o;
  
      if (!expression0.equals(that.expression0)) {
        return false;
      }
      if (!expression1.equals(that.expression1)) {
        return false;
      }
      if (!expression2.equals(that.expression2)) {
        return false;
      }
  
      return true;
    }
  
    @Override public int hashCode() {
      return Objects.hash(nodeType, type, expression0, expression1, expression2);
    }
  }
  