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Embeddable expression language for Java.
There is a newer version: 1.4.4
/*
 * 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 PlusNode extends AExpressionNode implements ExpressionNode {

  private ExpressionNode leftExpression;
  private ExpressionNode rightExpression;

  @Override
  public PlusNode copy() {
    PlusNode copy = new PlusNode();
    copy.sourceInfo = sourceInfo;
    copy.leftExpression = leftExpression.copy();
    copy.rightExpression = rightExpression.copy();
    return copy;
  }

  public ExpressionNode getLeftExpression() {
    return leftExpression;
  }

  public PlusNode setLeftExpression(ExpressionNode leftExpression) {
    this.leftExpression = leftExpression;
    return this;
  }

  public ExpressionNode getRightExpression() {
    return rightExpression;
  }

  public PlusNode setRightExpression(ExpressionNode rightExpression) {
    this.rightExpression = rightExpression;
    return this;
  }

  @Override
  public List getChildren() {
    return Arrays.asList(leftExpression, rightExpression);
  }

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

  @Override
  public Type getValueType() {

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

    if (leftExpression.getValueType() == Types.LONG && rightExpression.getValueType() == Types.LONG){
      return Types.LONG;
    }
    if (leftExpression.getValueType() == Types.DOUBLE || rightExpression.getValueType() == Types.DOUBLE){
      return Types.DOUBLE;
    }

    return Types.ANY;
  }

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

}