| /* |
| * Copyright 2003-2014 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.bugs; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.InheritanceUtil; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.psiutils.CollectionUtils; |
| import com.siyeh.ig.psiutils.EquivalenceChecker; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class CollectionAddedToSelfInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "collection.added.to.self.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| public String buildErrorString(Object... infos) { |
| final String methodName = (String)infos[0]; |
| return InspectionGadgetsBundle.message("collection.added.to.self.problem.descriptor", methodName); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new CollectionAddedToSelfVisitor(); |
| } |
| |
| private static class CollectionAddedToSelfVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitMethodCallExpression(@NotNull PsiMethodCallExpression call) { |
| super.visitMethodCallExpression(call); |
| final PsiReferenceExpression methodExpression = |
| call.getMethodExpression(); |
| @NonNls final String methodName = methodExpression.getReferenceName(); |
| if ("equals".equals(methodName)) { |
| return; // object method |
| } |
| final PsiExpression qualifier = |
| methodExpression.getQualifierExpression(); |
| if (!(qualifier instanceof PsiReferenceExpression)) { |
| return; |
| } |
| final PsiElement referent = ((PsiReference)qualifier).resolve(); |
| if (!(referent instanceof PsiVariable)) { |
| return; |
| } |
| final PsiExpressionList argumentList = call.getArgumentList(); |
| PsiExpression selfArgument = null; |
| final PsiExpression[] arguments = argumentList.getExpressions(); |
| for (PsiExpression argument : arguments) { |
| if (EquivalenceChecker.expressionsAreEquivalent(qualifier, argument)) { |
| selfArgument = argument; |
| } |
| } |
| if (selfArgument == null) { |
| return; |
| } |
| final PsiType qualifierType = qualifier.getType(); |
| if (!InheritanceUtil.isInheritor(qualifierType, CommonClassNames.JAVA_UTIL_COLLECTION) && |
| !InheritanceUtil.isInheritor(qualifierType, CommonClassNames.JAVA_UTIL_MAP)) { |
| return; |
| } |
| final PsiMethod method = call.resolveMethod(); |
| if (method == null) { |
| return; |
| } |
| final PsiClass aClass = method.getContainingClass(); |
| if (!CollectionUtils.isCollectionClassOrInterface(aClass)) { |
| return; |
| } |
| registerError(selfArgument, methodName); |
| } |
| } |
| } |