| /* |
| * Copyright 2003-2010 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.codeInsight.ExceptionUtil; |
| import com.intellij.psi.*; |
| import com.siyeh.HardcodedMethodConstants; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.psiutils.IteratorUtils; |
| import com.siyeh.ig.psiutils.MethodUtils; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.List; |
| |
| public class IteratorNextDoesNotThrowNoSuchElementExceptionInspection |
| extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getID() { |
| return "IteratorNextCanNotThrowNoSuchElementException"; |
| } |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "iterator.next.does.not.throw.nosuchelementexception.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| public String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "iterator.next.does.not.throw.nosuchelementexception.problem.descriptor"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new IteratorNextDoesNotThrowNoSuchElementExceptionVisitor(); |
| } |
| |
| private static class IteratorNextDoesNotThrowNoSuchElementExceptionVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitMethod(@NotNull PsiMethod method) { |
| // note: no call to super |
| if (!MethodUtils.methodMatches(method, CommonClassNames.JAVA_UTIL_ITERATOR, null, |
| HardcodedMethodConstants.NEXT)) { |
| return; |
| } |
| for (final PsiType exception : ExceptionUtil.getThrownExceptions(method)) { |
| if (exception.equalsToText( |
| "java.util.NoSuchElementException")) { |
| return; |
| } |
| } |
| if (IteratorUtils.containsCallToIteratorNext(method, null, false)) { |
| return; |
| } |
| final CalledMethodsVisitor visitor = new CalledMethodsVisitor(); |
| method.accept(visitor); |
| if (visitor.isNoSuchElementExceptionThrown()) { |
| return; |
| } |
| registerMethodError(method); |
| } |
| } |
| |
| private static class CalledMethodsVisitor |
| extends JavaRecursiveElementVisitor { |
| |
| private boolean noSuchElementExceptionThrown = false; |
| |
| @Override |
| public void visitMethodCallExpression( |
| PsiMethodCallExpression expression) { |
| if (noSuchElementExceptionThrown) { |
| return; |
| } |
| super.visitMethodCallExpression(expression); |
| final PsiReferenceExpression methodExpression = |
| expression.getMethodExpression(); |
| final PsiElement method = methodExpression.resolve(); |
| if (method == null) { |
| return; |
| } |
| final List<PsiClassType> exceptions = ExceptionUtil.getThrownExceptions(method); |
| for (final PsiType exception : exceptions) { |
| if (exception.equalsToText( |
| "java.util.NoSuchElementException")) { |
| noSuchElementExceptionThrown = true; |
| } |
| } |
| } |
| |
| public boolean isNoSuchElementExceptionThrown() { |
| return noSuchElementExceptionThrown; |
| } |
| } |
| } |