| /* |
| * Copyright 2003-2007 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.abstraction; |
| |
| import com.intellij.psi.*; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.psiutils.ClassUtils; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class ClassReferencesSubclassInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "class.references.subclass.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| public String buildErrorString(Object... infos) { |
| final PsiNamedElement element = (PsiNamedElement)infos[0]; |
| final String containingClassName = element.getName(); |
| final Boolean isAnonymous = (Boolean)infos[1]; |
| if (isAnonymous.booleanValue()) { |
| return InspectionGadgetsBundle.message( |
| "class.references.subclass.problem.descriptor.anonymous", |
| containingClassName); |
| } |
| return InspectionGadgetsBundle.message( |
| "class.references.subclass.problem.descriptor", |
| containingClassName); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new ClassReferencesSubclassVisitor(); |
| } |
| |
| private static class ClassReferencesSubclassVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitVariable(@NotNull PsiVariable variable) { |
| final PsiTypeElement typeElement = variable.getTypeElement(); |
| checkTypeElement(typeElement); |
| } |
| |
| @Override |
| public void visitMethod(@NotNull PsiMethod method) { |
| final PsiTypeElement typeElement = method.getReturnTypeElement(); |
| checkTypeElement(typeElement); |
| } |
| |
| @Override |
| public void visitInstanceOfExpression( |
| @NotNull PsiInstanceOfExpression expression) { |
| final PsiTypeElement typeElement = expression.getCheckType(); |
| checkTypeElement(typeElement); |
| } |
| |
| @Override |
| public void visitTypeCastExpression( |
| @NotNull PsiTypeCastExpression expression) { |
| final PsiTypeElement typeElement = expression.getCastType(); |
| checkTypeElement(typeElement); |
| } |
| |
| @Override |
| public void visitClassObjectAccessExpression( |
| @NotNull PsiClassObjectAccessExpression expression) { |
| final PsiTypeElement typeElement = expression.getOperand(); |
| checkTypeElement(typeElement); |
| } |
| |
| private void checkTypeElement(PsiTypeElement typeElement) { |
| if (typeElement == null) { |
| return; |
| } |
| final PsiType type = typeElement.getType(); |
| final PsiType componentType = type.getDeepComponentType(); |
| if (!(componentType instanceof PsiClassType)) { |
| return; |
| } |
| final PsiClassType classType = (PsiClassType)componentType; |
| final PsiClass aClass = classType.resolve(); |
| if (aClass instanceof PsiTypeParameter) { |
| return; |
| } |
| final PsiClass parentClass = |
| ClassUtils.getContainingClass(typeElement); |
| if (!isSubclass(aClass, parentClass)) { |
| return; |
| } |
| registerError(typeElement, parentClass, Boolean.FALSE); |
| } |
| |
| private static boolean isSubclass(@Nullable PsiClass childClass, |
| @Nullable PsiClass parent) { |
| if (childClass == null) { |
| return false; |
| } |
| if (parent == null) { |
| return false; |
| } |
| return childClass.isInheritor(parent, true); |
| } |
| } |
| } |