SimpleBinaryTransformation.java

/*
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * Licensed 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,
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package org.jetbrains.plugins.groovy.codeInspection.changeToOperator.transformations;

import com.intellij.psi.tree.IElementType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.codeInspection.changeToOperator.ChangeToOperatorInspection.Options;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrMethodCall;

import static java.lang.String.format;
import static org.jetbrains.plugins.groovy.codeInspection.GrInspectionUtil.replaceExpression;
import static org.jetbrains.plugins.groovy.lang.psi.impl.utils.ParenthesesUtils.*;

public class SimpleBinaryTransformation extends BinaryTransformation {

  private final IElementType myOperator;

  public SimpleBinaryTransformation(@NotNull IElementType operatorType) {
    myOperator = operatorType;
  }

  @Override
  public void apply(@NotNull GrMethodCall methodCall, @NotNull Options options) {
    GrExpression rhs = getRhs(methodCall);

    rhs = checkPrecedenceForBinaryOps(getPrecedence(rhs), myOperator, true) ? parenthesize(rhs) : rhs;
    replaceExpression(methodCall, format("%s %s %s", getLhs(methodCall).getText(), myOperator.toString(), rhs.getText()));
  }

  protected boolean needParentheses(@NotNull GrMethodCall methodCall,
                                    @NotNull Options options) {
    GrExpression rhs = getRhs(methodCall);
    int rhsPrecedence = getPrecedence(rhs);
    return checkPrecedenceForBinaryOps(rhsPrecedence, myOperator, true) || checkPrecedence(precedenceForBinaryOperator(myOperator), methodCall);
  }
}