com.twineworks.tweakflow.lang.ast.expressions.IfNode Maven / Gradle / Ivy

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2019 Twineworks GmbH
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.twineworks.tweakflow.lang.ast.expressions;

import com.twineworks.tweakflow.lang.interpreter.ops.ConstantOp;
import com.twineworks.tweakflow.lang.analysis.visitors.Visitor;
import com.twineworks.tweakflow.lang.ast.Node;
import com.twineworks.tweakflow.lang.types.Type;
import com.twineworks.tweakflow.lang.types.Types;

import java.util.Arrays;
import java.util.List;

public class IfNode extends AExpressionNode implements ExpressionNode {

  private ExpressionNode condition;
  private ExpressionNode thenExpression;
  private ExpressionNode elseExpression;

  public ExpressionNode getThenExpression() {
    return thenExpression;
  }

  public IfNode setThenExpression(ExpressionNode thenExpression) {
    this.thenExpression = thenExpression;
    return this;
  }

  public ExpressionNode getElseExpression() {
    return elseExpression;
  }

  public IfNode setElseExpression(ExpressionNode elseExpression) {
    this.elseExpression = elseExpression;
    return this;
  }

  @Override
  public List getChildren() {
    return Arrays.asList(condition, thenExpression, elseExpression);
  }

  @Override
  public ExpressionNode accept(Visitor visitor) {
    return visitor.visit(this);
  }

  @Override
  public Type getValueType() {

    if (expressionOp instanceof ConstantOp){
      return expressionOp.eval(null, null).type();
    }

    Type thenType = getThenExpression().getValueType();
    Type elseType = getElseExpression().getValueType();

    if (thenType == elseType){
      return thenType;
    }
    else{
      return Types.ANY;
    }

  }

  @Override
  public ExpressionType getExpressionType() {
    return ExpressionType.IF;
  }

  public ExpressionNode getCondition() {
    return condition;
  }

  public IfNode setCondition(ExpressionNode condition) {
    this.condition = condition;
    return this;
  }


}