| /* |
| * Copyright 2000-2014 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, |
| * 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.confusing; |
| |
| import com.intellij.codeInspection.LocalQuickFix; |
| import com.intellij.codeInspection.ProblemHighlightType; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiType; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.plugins.groovy.codeInspection.GroovyInspectionBundle; |
| import org.jetbrains.plugins.groovy.lang.psi.impl.GrReassignedLocalVarsChecker; |
| import org.jetbrains.plugins.groovy.codeInspection.BaseInspection; |
| import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor; |
| import org.jetbrains.plugins.groovy.codeInspection.utils.ControlFlowUtils; |
| import org.jetbrains.plugins.groovy.lang.psi.GrControlFlowOwner; |
| import org.jetbrains.plugins.groovy.lang.psi.GrNamedElement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlock; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrAnonymousClassDefinition; |
| import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil; |
| import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil; |
| |
| /** |
| * @author Max Medvedev |
| */ |
| public class GrReassignedInClosureLocalVarInspection extends BaseInspection { |
| |
| @Override |
| @Nls |
| @NotNull |
| public String getGroupDisplayName() { |
| return CONFUSING_CODE_CONSTRUCTS; |
| } |
| |
| @Override |
| @Nls |
| @NotNull |
| public String getDisplayName() { |
| return "Local variable is reassigned in closure or anonymous class"; |
| } |
| |
| @Override |
| public boolean isEnabledByDefault() { |
| return true; |
| } |
| |
| @NotNull |
| @Override |
| protected BaseInspectionVisitor buildVisitor() { |
| return new BaseInspectionVisitor() { |
| @Override |
| public void visitReferenceExpression(GrReferenceExpression referenceExpression) { |
| super.visitReferenceExpression(referenceExpression); |
| |
| if (!PsiUtil.isLValue(referenceExpression)) return; |
| final PsiElement resolved = referenceExpression.resolve(); |
| if (!PsiUtil.isLocalVariable(resolved)) return; |
| |
| final PsiType checked = GrReassignedLocalVarsChecker.getReassignedVarType(referenceExpression, false); |
| if (checked == null) return; |
| |
| final GrControlFlowOwner varFlowOwner = ControlFlowUtils.findControlFlowOwner(resolved); |
| final GrControlFlowOwner refFlorOwner = ControlFlowUtils.findControlFlowOwner(referenceExpression); |
| if (isOtherScopeAndType(referenceExpression, checked, varFlowOwner, refFlorOwner)) { |
| String flowDescription = getFlowDescription(refFlorOwner); |
| final String message = GroovyInspectionBundle |
| .message("local.var.0.is.reassigned", ((GrNamedElement)resolved).getName(), flowDescription); |
| registerError(referenceExpression, message, LocalQuickFix.EMPTY_ARRAY, ProblemHighlightType.GENERIC_ERROR_OR_WARNING); |
| } |
| } |
| }; |
| } |
| |
| private static boolean isOtherScopeAndType(GrReferenceExpression referenceExpression, |
| PsiType checked, |
| GrControlFlowOwner varFlowOwner, |
| GrControlFlowOwner refFlorOwner) { |
| return varFlowOwner != refFlorOwner && !TypesUtil.isAssignable(referenceExpression.getType(), checked, referenceExpression); |
| } |
| |
| private static String getFlowDescription(GrControlFlowOwner refFlorOwner) { |
| String flowDescription; |
| if (refFlorOwner instanceof GrClosableBlock) { |
| flowDescription = GroovyInspectionBundle.message("closure"); |
| } |
| else if (refFlorOwner instanceof GrAnonymousClassDefinition) { |
| flowDescription = GroovyInspectionBundle.message("anonymous.class"); |
| } |
| else { |
| flowDescription = GroovyInspectionBundle.message("other.scope"); |
| } |
| return flowDescription; |
| } |
| } |