| /* |
| * Copyright 2003-2013 Dave Griffith, Bas Leijdekkers |
| * |
| * 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.performance; |
| |
| import com.intellij.codeInsight.FileModificationService; |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.JavaCodeStyleManager; |
| import com.intellij.psi.search.SearchScope; |
| import com.intellij.psi.search.searches.ReferencesSearch; |
| import com.intellij.util.Query; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| |
| public class InnerClassMayBeStaticInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("inner.class.may.be.static.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message("inner.class.may.be.static.problem.descriptor"); |
| } |
| |
| @Override |
| public boolean runForWholeFile() { |
| return true; |
| } |
| |
| @Override |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new InnerClassMayBeStaticFix(); |
| } |
| |
| private static class InnerClassMayBeStaticFix extends InspectionGadgetsFix { |
| |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message("make.static.quickfix"); |
| } |
| |
| @Override |
| protected boolean prepareForWriting() { |
| return false; |
| } |
| |
| @Override |
| public void doFix(Project project, ProblemDescriptor descriptor) { |
| final PsiJavaToken classNameToken = (PsiJavaToken)descriptor.getPsiElement(); |
| final PsiClass innerClass = (PsiClass)classNameToken.getParent(); |
| if (innerClass == null) { |
| return; |
| } |
| final SearchScope useScope = innerClass.getUseScope(); |
| final Query<PsiReference> query = ReferencesSearch.search(innerClass, useScope); |
| final Collection<PsiReference> references = query.findAll(); |
| final List<PsiElement> elements = new ArrayList(references); |
| for (PsiReference reference : references) { |
| elements.add(reference.getElement()); |
| } |
| elements.add(innerClass); |
| if (!FileModificationService.getInstance().preparePsiElementsForWrite(elements)) { |
| return; |
| } |
| final JavaCodeStyleManager codeStyleManager = JavaCodeStyleManager.getInstance(project); |
| final PsiElementFactory factory = JavaPsiFacade.getElementFactory(project); |
| for (final PsiReference reference : references) { |
| final PsiElement element = reference.getElement(); |
| final PsiElement parent = element.getParent(); |
| if (!(parent instanceof PsiNewExpression)) { |
| continue; |
| } |
| final PsiNewExpression newExpression = (PsiNewExpression)parent; |
| final PsiJavaCodeReferenceElement classReference = newExpression.getClassReference(); |
| if (classReference == null) { |
| continue; |
| } |
| final PsiExpressionList argumentList = newExpression.getArgumentList(); |
| if (argumentList == null) { |
| continue; |
| } |
| final PsiExpression expression = |
| factory.createExpressionFromText("new " + classReference.getQualifiedName() + argumentList.getText(), innerClass); |
| codeStyleManager.shortenClassReferences(newExpression.replace(expression)); |
| } |
| final PsiModifierList modifiers = innerClass.getModifierList(); |
| if (modifiers == null) { |
| return; |
| } |
| modifiers.setModifierProperty(PsiModifier.STATIC, true); |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new InnerClassMayBeStaticVisitor(); |
| } |
| |
| private static class InnerClassMayBeStaticVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitClass(@NotNull PsiClass aClass) { |
| if (aClass.getContainingClass() != null && !aClass.hasModifierProperty(PsiModifier.STATIC)) { |
| return; |
| } |
| if (aClass instanceof PsiAnonymousClass) { |
| return; |
| } |
| final PsiClass[] innerClasses = aClass.getInnerClasses(); |
| for (final PsiClass innerClass : innerClasses) { |
| if (innerClass.hasModifierProperty(PsiModifier.STATIC)) { |
| continue; |
| } |
| final InnerClassReferenceVisitor visitor = new InnerClassReferenceVisitor(innerClass); |
| innerClass.accept(visitor); |
| if (!visitor.canInnerClassBeStatic()) { |
| continue; |
| } |
| registerClassError(innerClass); |
| } |
| } |
| } |
| } |