| /* |
| * Copyright 2009-2010 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.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.JavaCodeStyleManager; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.psi.util.PsiTreeUtil; |
| 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.PsiReplacementUtil; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public class ClassNewInstanceInspection extends BaseInspection { |
| |
| @Override |
| @Nls |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "class.new.instance.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "class.new.instance.problem.descriptor"); |
| } |
| |
| @Override |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new ClassNewInstanceFix(); |
| } |
| |
| private static class ClassNewInstanceFix extends InspectionGadgetsFix { |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message( |
| "class.new.instance.quickfix"); |
| } |
| |
| @NotNull |
| @Override |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) |
| throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiElement parent = element.getParent(); |
| if (!(parent instanceof PsiReferenceExpression)) { |
| return; |
| } |
| final PsiReferenceExpression methodExpression = |
| (PsiReferenceExpression)parent; |
| final PsiExpression qualifier = |
| methodExpression.getQualifierExpression(); |
| if (qualifier == null) { |
| return; |
| } |
| final PsiElement grandParent = parent.getParent(); |
| if (!(grandParent instanceof PsiMethodCallExpression)) { |
| return; |
| } |
| final PsiElement parentOfType = PsiTreeUtil.getParentOfType(element, |
| PsiMethod.class, PsiTryStatement.class); |
| if (parentOfType instanceof PsiTryStatement) { |
| final PsiTryStatement tryStatement = |
| (PsiTryStatement)parentOfType; |
| addCatchBlock(tryStatement, "java.lang.NoSuchMethodException", |
| "java.lang.reflect.InvocationTargetException"); |
| } |
| else { |
| final PsiMethod method = (PsiMethod)parentOfType; |
| addThrowsClause(method, "java.lang.NoSuchMethodException", |
| "java.lang.reflect.InvocationTargetException"); |
| } |
| final PsiMethodCallExpression methodCallExpression = |
| (PsiMethodCallExpression)grandParent; |
| @NonNls final String newExpression = qualifier.getText() + |
| ".getConstructor().newInstance()"; |
| PsiReplacementUtil.replaceExpression(methodCallExpression, newExpression); |
| } |
| |
| private static void addThrowsClause(PsiMethod method, |
| String... exceptionNames) { |
| final PsiReferenceList throwsList = method.getThrowsList(); |
| final PsiClassType[] referencedTypes = |
| throwsList.getReferencedTypes(); |
| final Set<String> presentExceptionNames = new HashSet(); |
| for (PsiClassType referencedType : referencedTypes) { |
| final String exceptionName = referencedType.getCanonicalText(); |
| presentExceptionNames.add(exceptionName); |
| } |
| final Project project = method.getProject(); |
| final PsiElementFactory factory = |
| JavaPsiFacade.getElementFactory(project); |
| final JavaCodeStyleManager codeStyleManager = |
| JavaCodeStyleManager.getInstance(project); |
| final GlobalSearchScope scope = method.getResolveScope(); |
| for (String exceptionName : exceptionNames) { |
| if (presentExceptionNames.contains(exceptionName)) { |
| continue; |
| } |
| final PsiJavaCodeReferenceElement throwsReference = |
| factory.createReferenceElementByFQClassName( |
| exceptionName, scope); |
| final PsiElement element = throwsList.add(throwsReference); |
| codeStyleManager.shortenClassReferences(element); |
| } |
| } |
| |
| protected static void addCatchBlock(PsiTryStatement tryStatement, |
| String... exceptionNames) |
| throws IncorrectOperationException { |
| final Project project = tryStatement.getProject(); |
| final PsiParameter[] parameters = |
| tryStatement.getCatchBlockParameters(); |
| final Set<String> presentExceptionNames = new HashSet(); |
| for (PsiParameter parameter : parameters) { |
| final PsiType type = parameter.getType(); |
| final String exceptionName = type.getCanonicalText(); |
| presentExceptionNames.add(exceptionName); |
| } |
| final JavaCodeStyleManager codeStyleManager = |
| JavaCodeStyleManager.getInstance(project); |
| final String name = codeStyleManager.suggestUniqueVariableName("e", |
| tryStatement.getTryBlock(), false); |
| final PsiElementFactory factory = |
| JavaPsiFacade.getElementFactory(project); |
| for (String exceptionName : exceptionNames) { |
| if (presentExceptionNames.contains(exceptionName)) { |
| continue; |
| } |
| final PsiClassType type = (PsiClassType) |
| factory.createTypeFromText(exceptionName, tryStatement); |
| final PsiCatchSection section = |
| factory.createCatchSection(type, name, tryStatement); |
| final PsiCatchSection element = (PsiCatchSection) |
| tryStatement.add(section); |
| codeStyleManager.shortenClassReferences(element); |
| } |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new ClassNewInstanceVisitor(); |
| } |
| |
| private static class ClassNewInstanceVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitMethodCallExpression( |
| PsiMethodCallExpression expression) { |
| final PsiReferenceExpression methodExpression = |
| expression.getMethodExpression(); |
| @NonNls final String methodName = methodExpression.getReferenceName(); |
| if (!"newInstance".equals(methodName)) { |
| return; |
| } |
| final PsiExpression qualifier = |
| methodExpression.getQualifierExpression(); |
| if (qualifier == null) { |
| return; |
| } |
| final PsiType qualifierType = qualifier.getType(); |
| if (!(qualifierType instanceof PsiClassType)) { |
| return; |
| } |
| final PsiClassType classType = (PsiClassType)qualifierType; |
| final PsiClass aClass = classType.resolve(); |
| if (aClass == null) { |
| return; |
| } |
| final String className = aClass.getQualifiedName(); |
| if (!CommonClassNames.JAVA_LANG_CLASS.equals(className)) { |
| return; |
| } |
| registerMethodCallError(expression); |
| } |
| } |
| } |