| /* |
| * Copyright 2003-2012 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.classlayout; |
| |
| import com.intellij.psi.*; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class MarkerInterfaceInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("marker.interface.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "marker.interface.problem.descriptor"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new MarkerInterfaceVisitor(); |
| } |
| |
| private static class MarkerInterfaceVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitClass(@NotNull PsiClass aClass) { |
| if (!aClass.isInterface() || aClass.isAnnotationType()) { |
| return; |
| } |
| final PsiField[] fields = aClass.getFields(); |
| if (fields.length != 0) { |
| return; |
| } |
| final PsiMethod[] methods = aClass.getMethods(); |
| if (methods.length != 0) { |
| return; |
| } |
| final PsiReferenceList extendsList = aClass.getExtendsList(); |
| if (extendsList != null) { |
| final PsiJavaCodeReferenceElement[] referenceElements = extendsList.getReferenceElements(); |
| if (referenceElements.length > 0) { |
| if (referenceElements.length > 1) { |
| return; |
| } |
| final PsiReferenceParameterList parameterList = referenceElements[0].getParameterList(); |
| if (parameterList == null) { |
| return; |
| } |
| final PsiTypeElement[] typeParameterElements = parameterList.getTypeParameterElements(); |
| if (typeParameterElements.length != 0) { |
| return; |
| } |
| } |
| } |
| registerClassError(aClass); |
| } |
| } |
| } |