| /* |
| * Copyright 2000-2009 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. |
| */ |
| |
| /* |
| * @author max |
| */ |
| package com.siyeh.ig.performance; |
| |
| import com.intellij.codeInspection.InspectionManager; |
| import com.intellij.openapi.extensions.Extensions; |
| import com.intellij.openapi.extensions.ExtensionsArea; |
| import com.intellij.openapi.util.Condition; |
| import com.intellij.psi.*; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import com.siyeh.ig.fixes.ChangeModifierFix; |
| import com.siyeh.ig.psiutils.ClassUtils; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class ClassInitializerMayBeStaticInspection extends BaseInspection { |
| @Override |
| public boolean isEnabledByDefault() { |
| return true; |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "class.initializer.may.be.static.problem.descriptor"); |
| } |
| |
| @Override |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new ChangeModifierFix(PsiModifier.STATIC); |
| } |
| |
| @Override |
| @Nls |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "class.initializer.may.be.static.display.name"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new ClassInitializerCanBeStaticVisitor(); |
| } |
| |
| private static class ClassInitializerCanBeStaticVisitor extends BaseInspectionVisitor { |
| @Override |
| public void visitClassInitializer(PsiClassInitializer initializer) { |
| if (initializer.hasModifierProperty(PsiModifier.STATIC)) return; |
| |
| final PsiClass containingClass = |
| ClassUtils.getContainingClass(initializer); |
| if (containingClass == null) { |
| return; |
| } |
| final Condition<PsiElement>[] addins = InspectionManager.CANT_BE_STATIC_EXTENSION.getExtensions(); |
| for (Condition<PsiElement> addin : addins) { |
| if (addin.value(initializer)) { |
| return; |
| } |
| } |
| final PsiElement scope = containingClass.getScope(); |
| if (!(scope instanceof PsiJavaFile) && |
| !containingClass.hasModifierProperty(PsiModifier.STATIC)) { |
| return; |
| } |
| |
| final MethodReferenceVisitor visitor = |
| new MethodReferenceVisitor(initializer); |
| initializer.accept(visitor); |
| if (!visitor.areReferencesStaticallyAccessible()) { |
| return; |
| } |
| |
| registerClassInitializerError(initializer); |
| } |
| } |
| } |