| /* |
| * 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.classlayout; |
| |
| import com.intellij.psi.PsiClass; |
| import com.intellij.psi.PsiMethod; |
| import com.intellij.psi.PsiModifier; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * @author Bas Leijdekkers |
| */ |
| public class ClassWithOnlyPrivateConstructorsInspectionBase extends BaseInspection { |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("class.with.only.private.constructors.display.name"); |
| } |
| |
| @NotNull |
| @Override |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message("class.with.only.private.constructors.problem.descriptor"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new ClassWithOnlyPrivateConstructorsVisitor(); |
| } |
| |
| private static class ClassWithOnlyPrivateConstructorsVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitClass(PsiClass aClass) { |
| super.visitClass(aClass); |
| if (aClass.isEnum()) { |
| return; |
| } |
| final PsiMethod[] constructors = aClass.getConstructors(); |
| if (constructors.length == 0) { |
| return; |
| } |
| for (PsiMethod constructor : constructors) { |
| if (constructor.hasModifierProperty(PsiModifier.FINAL)) { |
| return; |
| } |
| } |
| final PsiClass[] innerClasses = aClass.getInnerClasses(); |
| for (PsiClass innerClass : innerClasses) { |
| if (isExtendedByInnerClass(innerClass, aClass, new HashSet<PsiClass>())) { |
| return; |
| } |
| } |
| registerClassError(aClass, aClass); |
| } |
| |
| private static boolean isExtendedByInnerClass(PsiClass innerClass, PsiClass superClass, Set<PsiClass> visited) { |
| if (!visited.add(innerClass)) { |
| return false; |
| } |
| if (innerClass.isInheritor(superClass, false)) { |
| return true; |
| } |
| final PsiClass[] innerClasses = innerClass.getInnerClasses(); |
| for (PsiClass aClass : innerClasses) { |
| if (isExtendedByInnerClass(aClass, superClass, visited)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |
| } |