| /* |
| * 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 com.siyeh.ig.memory; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.psi.util.PsiUtil; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class AnonymousInnerClassMayBeStaticInspectionBase extends BaseInspection { |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "anonymous.inner.may.be.named.static.inner.class.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| public String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "anonymous.inner.may.be.named.static.inner.class.problem.descriptor"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new AnonymousInnerClassMayBeStaticVisitor(); |
| } |
| |
| private static class AnonymousInnerClassMayBeStaticVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitAnonymousClass(@NotNull PsiAnonymousClass anonymousClass) { |
| if (anonymousClass instanceof PsiEnumConstantInitializer) { |
| return; |
| } |
| final PsiMember containingMember = PsiTreeUtil.getParentOfType(anonymousClass, PsiMember.class); |
| if (containingMember == null || containingMember.hasModifierProperty(PsiModifier.STATIC)) { |
| return; |
| } |
| final PsiJavaCodeReferenceElement reference = anonymousClass.getBaseClassReference(); |
| if (reference.resolve() == null) { |
| // don't warn on broken code |
| return; |
| } |
| final PsiClass containingClass = PsiTreeUtil.getParentOfType(anonymousClass, PsiClass.class); |
| if (containingClass == null) { |
| return; |
| } |
| if (containingClass.getContainingClass() != null && !containingClass.hasModifierProperty(PsiModifier.STATIC)) { |
| // strictly speaking can be named static inner class but not when part of the current containing class |
| return; |
| } |
| final InnerClassReferenceVisitor visitor = new InnerClassReferenceVisitor(anonymousClass); |
| anonymousClass.accept(visitor); |
| if (!visitor.canInnerClassBeStatic()) { |
| return; |
| } |
| if (hasReferenceToLocalClass(anonymousClass)) { |
| return; |
| } |
| registerClassError(anonymousClass); |
| } |
| |
| private static boolean hasReferenceToLocalClass(PsiAnonymousClass anonymousClass) { |
| final LocalClassReferenceVisitor visitor = new LocalClassReferenceVisitor(); |
| anonymousClass.accept(visitor); |
| return visitor.hasReferenceToLocalClass(); |
| } |
| |
| private static class LocalClassReferenceVisitor extends JavaRecursiveElementVisitor { |
| |
| private boolean referenceToLocalClass = false; |
| |
| @Override |
| public void visitReferenceElement(PsiJavaCodeReferenceElement reference) { |
| super.visitReferenceElement(reference); |
| if (reference.getQualifier() != null) { |
| return; |
| } |
| final PsiElement target = reference.resolve(); |
| if (!(target instanceof PsiClass) || !PsiUtil.isLocalClass((PsiClass)target)) { |
| return; |
| } |
| referenceToLocalClass = true; |
| } |
| |
| public boolean hasReferenceToLocalClass() { |
| return referenceToLocalClass; |
| } |
| } |
| } |
| } |