| /* |
| * Copyright 2011 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.errorhandling; |
| |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import com.siyeh.ig.psiutils.ParenthesesUtils; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class NullThrownInspection extends BaseInspection { |
| |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("null.thrown.display.name"); |
| } |
| |
| @NotNull |
| @Override |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "null.thrown.problem.descriptor"); |
| } |
| |
| @Override |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new ThrowNullFix(); |
| } |
| |
| private static class ThrowNullFix extends InspectionGadgetsFix { |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @NotNull |
| @Override |
| public String getName() { |
| return InspectionGadgetsBundle.message("null.thrown.quickfix"); |
| } |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) |
| throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiElementFactory factory = |
| JavaPsiFacade.getElementFactory(project); |
| final PsiExpression newExpression = |
| factory.createExpressionFromText( |
| "new java.lang.NullPointerException()", element); |
| element.replace(newExpression); |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new ThrowNullVisitor(); |
| } |
| |
| private static class ThrowNullVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitThrowStatement(PsiThrowStatement statement) { |
| super.visitThrowStatement(statement); |
| final PsiExpression exception = |
| ParenthesesUtils.stripParentheses(statement.getException()); |
| if (!(exception instanceof PsiLiteralExpression)) { |
| return; |
| } |
| final PsiType type = exception.getType(); |
| if (!PsiType.NULL.equals(type)) { |
| return; |
| } |
| registerError(exception); |
| } |
| } |
| } |