| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.netbeans.modules.j2ee.ejbverification.rules; |
| |
| import com.sun.source.tree.Tree; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import javax.lang.model.element.AnnotationMirror; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.element.VariableElement; |
| import javax.lang.model.type.TypeMirror; |
| import javax.lang.model.util.ElementFilter; |
| import org.netbeans.api.j2ee.core.Profile; |
| import org.netbeans.api.java.source.CompilationInfo; |
| import org.netbeans.modules.j2ee.api.ejbjar.EjbJar; |
| import org.netbeans.modules.j2ee.ejbverification.EJBAPIAnnotations; |
| import org.netbeans.modules.j2ee.ejbverification.EJBProblemContext; |
| import org.netbeans.modules.j2ee.ejbverification.HintsUtils; |
| import org.netbeans.modules.j2ee.ejbverification.JavaUtils; |
| import org.netbeans.spi.editor.hints.ErrorDescription; |
| import org.netbeans.spi.java.hints.Hint; |
| import org.netbeans.spi.java.hints.HintContext; |
| import org.netbeans.spi.java.hints.TriggerTreeKind; |
| import org.openide.util.NbBundle.Messages; |
| |
| /** |
| * Hint that checks usage of @PostConstruct annotation. Its return value, singularity per class, parameters etc. |
| * |
| * @author Martin Fousek <marfous@netbeans.org> |
| */ |
| @Hint(displayName = "#AnnotationPostContruct.display.name", |
| description = "#AnnotationPostContruct.description", |
| id = "o.n.m.j2ee.ejbverification.AnnotationPostContruct", |
| category = "javaee/ejb", |
| enabled = true, |
| suppressWarnings = "AnnotationPostContruct") |
| @Messages({ |
| "AnnotationPostContruct.display.name=Annotation @PostConstruct", |
| "AnnotationPostContruct.description=Checks usage of @PostConstruct annotation. Its return value, singularity per class, parameters etc.", |
| "AnnotationPostContruct_too_much_annotations=There cannot be more than one method annotated @PostConstruct", |
| "AnnotationPostContruct_wrong_return_type=Return type of @PostConstruct annotated method must be void.", |
| "AnnotationPostContruct_thrown_checked_exceptions=@PostConstruct annotated method must not throw a checked exception.", |
| "AnnotationPostContruct_wrong_parameters=@PostConstruct annotated method must not have any parameters except in the case of EJB interceptors in which case it takes an InvocationContext subclasses." |
| }) |
| public final class AnnotationPostContruct { |
| |
| private AnnotationPostContruct() { } |
| |
| @TriggerTreeKind(Tree.Kind.CLASS) |
| public static List<ErrorDescription> run(HintContext hintCtx) { |
| EJBProblemContext ctx = HintsUtils.getOrCacheContext(hintCtx); |
| if (ctx != null) { |
| EjbJar ejbModule = ctx.getEjbModule(); |
| Profile profile = ejbModule.getJ2eeProfile(); |
| |
| // not EE6+ project |
| if (profile == null || !profile.isAtLeast(Profile.JAVA_EE_6_WEB)) { |
| return Collections.emptyList(); |
| } |
| |
| List<ExecutableElement> allMethods = ElementFilter.methodsIn(ctx.getClazz().getEnclosedElements()); |
| List<ExecutableElement> eligibleMethods = new ArrayList<>(); |
| List<ErrorDescription> problems = new ArrayList<>(); |
| |
| for (ExecutableElement method : allMethods) { |
| if (isEligibleMethod(method)) { |
| eligibleMethods.add(method); |
| } |
| } |
| |
| // more than one annotated method |
| if (eligibleMethods.size() > 1) { |
| for (ExecutableElement problematicMethods : eligibleMethods) { |
| problems.add(HintsUtils.createProblem( |
| problematicMethods, |
| hintCtx.getInfo(), |
| Bundle.AnnotationPostContruct_too_much_annotations())); |
| } |
| } |
| |
| for (ExecutableElement method : eligibleMethods) { |
| // wrong return type |
| if (!"void".equals(method.getReturnType().toString())) { //NOI18N |
| problems.add(HintsUtils.createProblem( |
| method, |
| hintCtx.getInfo(), |
| Bundle.AnnotationPostContruct_wrong_return_type())); |
| } |
| // cannot throw unchecked exceptions |
| if (!method.getThrownTypes().isEmpty() && throwsCheckedException(hintCtx.getInfo(), method.getThrownTypes())) { |
| problems.add(HintsUtils.createProblem( |
| method, |
| hintCtx.getInfo(), |
| Bundle.AnnotationPostContruct_thrown_checked_exceptions())); |
| } |
| // no parameter except in the case of EJB interceptor |
| List<? extends VariableElement> parameters = method.getParameters(); |
| if (!parameters.isEmpty() |
| && (parameters.size() > 1 || !isEjbInterceptor(hintCtx.getInfo(), method))) { |
| problems.add(HintsUtils.createProblem( |
| method, |
| hintCtx.getInfo(), |
| Bundle.AnnotationPostContruct_wrong_parameters())); |
| } |
| } |
| |
| return problems; |
| } |
| return Collections.emptyList(); |
| } |
| |
| private static boolean isEjbInterceptor(CompilationInfo info, ExecutableElement method) { |
| VariableElement parameter = method.getParameters().get(0); |
| String paramType = parameter.asType().toString(); |
| TypeElement element = info.getElements().getTypeElement(paramType); |
| if (element != null) { //NOI18N |
| if (JavaUtils.isTypeOf(info, element, "javax.interceptor.InvocationContext")) { //NOI18N |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private static boolean throwsCheckedException(CompilationInfo info, List<? extends TypeMirror> thrownTypes) { |
| for (TypeMirror typeMirror : thrownTypes) { |
| boolean runtimeException = false; |
| TypeElement element = info.getElements().getTypeElement(typeMirror.toString()); |
| if (element != null) { //NOI18N |
| if (JavaUtils.isTypeOf(info, element, "java.lang.RuntimeException")) { //NOI18N |
| runtimeException = true; |
| } |
| } |
| if (!runtimeException) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private static boolean isEligibleMethod(ExecutableElement method) { |
| boolean knownClasses = HintsUtils.isContainingKnownClasses(method); |
| for (AnnotationMirror am : method.getAnnotationMirrors()) { |
| if (EJBAPIAnnotations.POST_CONSTRUCT.equals(am.getAnnotationType().asElement().toString()) |
| && knownClasses) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |