| /* |
| * Copyright 2000-2011 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 Alexey |
| */ |
| package com.intellij.codeInsight; |
| |
| import com.intellij.psi.*; |
| import gnu.trove.THashSet; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| public class ClassUtil { |
| private ClassUtil() { } |
| |
| @Nullable |
| public static PsiMethod getAnyAbstractMethod(@NotNull PsiClass aClass) { |
| PsiMethod methodToImplement = getAnyMethodToImplement(aClass); |
| if (methodToImplement != null) { |
| return methodToImplement; |
| } |
| PsiMethod[] methods = aClass.getMethods(); |
| for (PsiMethod method : methods) { |
| if (method.hasModifierProperty(PsiModifier.ABSTRACT)) return method; |
| } |
| |
| return null; |
| } |
| |
| @Nullable |
| public static PsiMethod getAnyMethodToImplement(@NotNull PsiClass aClass) { |
| Set<PsiMethod> alreadyImplemented = new THashSet<PsiMethod>(); |
| for (HierarchicalMethodSignature signatureHierarchical : aClass.getVisibleSignatures()) { |
| for (PsiMethod superS : signatureHierarchical.getMethod().findSuperMethods()) { |
| add(superS, alreadyImplemented); |
| } |
| } |
| PsiResolveHelper resolveHelper = JavaPsiFacade.getInstance(aClass.getProject()).getResolveHelper(); |
| for (HierarchicalMethodSignature signatureHierarchical : aClass.getVisibleSignatures()) { |
| PsiMethod method = signatureHierarchical.getMethod(); |
| PsiClass containingClass = method.getContainingClass(); |
| if (containingClass == null) { |
| continue; |
| } |
| if (!aClass.equals(containingClass) |
| && method.hasModifierProperty(PsiModifier.ABSTRACT) |
| && !method.hasModifierProperty(PsiModifier.STATIC) |
| && !method.hasModifierProperty(PsiModifier.PRIVATE) |
| && !alreadyImplemented.contains(method)) { |
| return method; |
| } |
| final List<HierarchicalMethodSignature> superSignatures = signatureHierarchical.getSuperSignatures(); |
| for (HierarchicalMethodSignature superSignatureHierarchical : superSignatures) { |
| final PsiMethod superMethod = superSignatureHierarchical.getMethod(); |
| if (superMethod.hasModifierProperty(PsiModifier.ABSTRACT) && !resolveHelper.isAccessible(superMethod, method, null)) { |
| return superMethod; |
| } |
| } |
| } |
| |
| return checkPackageLocalInSuperClass(aClass); |
| } |
| |
| @Nullable |
| private static PsiMethod checkPackageLocalInSuperClass(@NotNull PsiClass aClass) { |
| // super class can have package local abstract methods not accessible for overriding |
| PsiClass superClass = aClass.getSuperClass(); |
| if (superClass == null) return null; |
| if (CommonClassNames.JAVA_LANG_OBJECT.equals(aClass.getQualifiedName())) return null; |
| if (JavaPsiFacade.getInstance(aClass.getProject()).arePackagesTheSame(aClass, superClass)) return null; |
| |
| for (HierarchicalMethodSignature methodSignature : superClass.getVisibleSignatures()) { |
| PsiMethod method = methodSignature.getMethod(); |
| if (method.hasModifierProperty(PsiModifier.ABSTRACT) && method.hasModifierProperty(PsiModifier.PACKAGE_LOCAL)) return method; |
| } |
| return null; |
| } |
| |
| private static boolean add(PsiMethod method, Set<PsiMethod> alreadyImplemented) { |
| boolean already = alreadyImplemented.add(method); |
| if (!already) return already; |
| |
| for (PsiMethod superSig : method.findSuperMethods()) { |
| already &= add(superSig, alreadyImplemented); |
| } |
| return already; |
| } |
| } |