/*
 * 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 com.qihoo.qsql.org.apache.calcite.linq4j.tree;

import java.lang.reflect.Type;
import java.util.Objects;

/**
 * Represents an operation between an expression and a type.
 */
public class TypeBinaryExpression extends Expression {
  public final Expression expression;
  public final Type type;

  public TypeBinaryExpression(ExpressionType nodeType, Expression expression,
      Type type) {
    super(nodeType, Boolean.TYPE);
    assert expression != null : "expression should not be null";
    this.expression = expression;
    this.type = type;
  }

  @Override public Expression accept(Shuttle shuttle) {
    shuttle = shuttle.preVisit(this);
    Expression expression = this.expression.accept(shuttle);
    return shuttle.visit(this, expression);
  }

  public <R> R accept(Visitor<R> visitor) {
    return visitor.visit(this);
  }

  void accept(ExpressionWriter writer, int lprec, int rprec) {
    if (writer.requireParentheses(this, lprec, rprec)) {
      return;
    }
    expression.accept(writer, lprec, nodeType.lprec);
    writer.append(nodeType.op);
    writer.append(type);
  }

  @Override public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    if (!super.equals(o)) {
      return false;
    }

    TypeBinaryExpression that = (TypeBinaryExpression) o;

    if (!expression.equals(that.expression)) {
      return false;
    }
    if (type != null ? !type.equals(that.type) : that.type != null) {
      return false;
    }

    return true;
  }

  @Override public int hashCode() {
    return Objects.hash(nodeType, super.type, type, expression);
  }
}

// End TypeBinaryExpression.java