| /* |
| * Copyright 2005-2013 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 org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class SuspiciousToArrayCallInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("suspicious.to.array.call.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| final PsiType type = (PsiType)infos[0]; |
| return InspectionGadgetsBundle.message("suspicious.to.array.call.problem.descriptor", type.getCanonicalText()); |
| } |
| |
| @Override |
| public boolean isEnabledByDefault() { |
| return true; |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new SuspiciousToArrayCallVisitor(); |
| } |
| |
| private static class SuspiciousToArrayCallVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitMethodCallExpression( |
| @NotNull PsiMethodCallExpression expression) { |
| super.visitMethodCallExpression(expression); |
| final PsiReferenceExpression methodExpression = |
| expression.getMethodExpression(); |
| @NonNls final String methodName = |
| methodExpression.getReferenceName(); |
| if (!"toArray".equals(methodName)) { |
| return; |
| } |
| final PsiExpression qualifierExpression = |
| methodExpression.getQualifierExpression(); |
| if (qualifierExpression == null) { |
| return; |
| } |
| final PsiType type = qualifierExpression.getType(); |
| if (!(type instanceof PsiClassType)) { |
| return; |
| } |
| final PsiClassType classType = (PsiClassType)type; |
| final PsiClass aClass = classType.resolve(); |
| if (aClass == null || |
| !InheritanceUtil.isInheritor(aClass, |
| CommonClassNames.JAVA_UTIL_COLLECTION)) { |
| return; |
| } |
| final PsiExpressionList argumentList = expression.getArgumentList(); |
| final PsiExpression[] arguments = argumentList.getExpressions(); |
| if (arguments.length != 1) { |
| return; |
| } |
| final PsiExpression argument = arguments[0]; |
| checkCollectionAndArrayTypes(classType, argument, expression); |
| } |
| |
| private void checkCollectionAndArrayTypes( |
| @NotNull PsiClassType collectionType, |
| @NotNull PsiExpression argument, |
| @NotNull PsiMethodCallExpression expression) { |
| final PsiType argumentType = argument.getType(); |
| if (!(argumentType instanceof PsiArrayType)) { |
| return; |
| } |
| final PsiArrayType arrayType = (PsiArrayType)argumentType; |
| final PsiType componentType = arrayType.getComponentType(); |
| final PsiElement parent = expression.getParent(); |
| if (parent instanceof PsiTypeCastExpression) { |
| final PsiTypeCastExpression castExpression = |
| (PsiTypeCastExpression)parent; |
| final PsiTypeElement castTypeElement = |
| castExpression.getCastType(); |
| if (castTypeElement == null) { |
| return; |
| } |
| final PsiType castType = castTypeElement.getType(); |
| if (castType.equals(arrayType) || !(castType instanceof PsiArrayType)) { |
| return; |
| } |
| final PsiArrayType castArrayType = (PsiArrayType)castType; |
| registerError(argument, castArrayType.getComponentType()); |
| } |
| else { |
| if (!collectionType.hasParameters()) { |
| return; |
| } |
| final PsiType[] parameters = collectionType.getParameters(); |
| if (parameters.length != 1) { |
| return; |
| } |
| final PsiType parameter = parameters[0]; |
| if (componentType.isAssignableFrom(parameter)) { |
| return; |
| } |
| registerError(argument, parameter); |
| } |
| } |
| } |
| } |