| /* |
| * Copyright 2007-2008 Dave Griffith |
| * |
| * 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, |
| * 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.jetbrains.plugins.groovy.codeInspection.utils; |
| |
| import com.intellij.psi.tree.IElementType; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.plugins.groovy.lang.lexer.GroovyTokenTypes; |
| import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement; |
| import org.jetbrains.plugins.groovy.lang.psi.GroovyRecursiveElementVisitor; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrAssignmentExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrNewExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrUnaryExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.path.GrMethodCallExpression; |
| |
| public class SideEffectChecker { |
| |
| private SideEffectChecker() { |
| super(); |
| } |
| |
| public static boolean mayHaveSideEffects(@NotNull GrExpression exp) { |
| final SideEffectsVisitor visitor = new SideEffectsVisitor(); |
| exp.accept(visitor); |
| return visitor.mayHaveSideEffects(); |
| } |
| |
| private static class SideEffectsVisitor extends GroovyRecursiveElementVisitor { |
| |
| private boolean mayHaveSideEffects = false; |
| |
| @Override |
| public void visitElement(@NotNull GroovyPsiElement element) { |
| if (!mayHaveSideEffects) { |
| super.visitElement(element); |
| } |
| } |
| |
| @Override |
| public void visitAssignmentExpression( |
| @NotNull GrAssignmentExpression expression) { |
| if (mayHaveSideEffects) { |
| return; |
| } |
| super.visitAssignmentExpression(expression); |
| mayHaveSideEffects = true; |
| } |
| |
| @Override |
| public void visitMethodCallExpression( |
| @NotNull GrMethodCallExpression expression) { |
| if (mayHaveSideEffects) { |
| return; |
| } |
| super.visitMethodCallExpression(expression); |
| mayHaveSideEffects = true; |
| } |
| |
| @Override |
| public void visitNewExpression(@NotNull GrNewExpression expression) { |
| if (mayHaveSideEffects) { |
| return; |
| } |
| super.visitNewExpression(expression); |
| mayHaveSideEffects = true; |
| } |
| |
| @Override |
| public void visitUnaryExpression( |
| @NotNull GrUnaryExpression expression) { |
| if (mayHaveSideEffects) { |
| return; |
| } |
| super.visitUnaryExpression(expression); |
| final IElementType tokenType = expression.getOperationTokenType(); |
| if (tokenType.equals(GroovyTokenTypes.mINC) || |
| tokenType.equals(GroovyTokenTypes.mDEC)) { |
| mayHaveSideEffects = true; |
| } |
| } |
| |
| public boolean mayHaveSideEffects() { |
| return mayHaveSideEffects; |
| } |
| } |
| } |