| /* |
| * |
| * 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.apache.qpid.server.model.validation; |
| |
| |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.annotation.processing.AbstractProcessor; |
| import javax.annotation.processing.RoundEnvironment; |
| import javax.annotation.processing.SupportedAnnotationTypes; |
| import javax.lang.model.SourceVersion; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.ElementKind; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.Name; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.TypeMirror; |
| import javax.lang.model.util.Elements; |
| import javax.tools.Diagnostic; |
| |
| @SupportedAnnotationTypes(ManagedAttributeValueTypeValidator.MANAGED_ATTRIBUTE_VALUE_TYPE_CLASS_NAME) |
| public class ManagedAttributeValueTypeValidator extends AbstractProcessor |
| { |
| |
| public static final String MANAGED_ATTRIBUTE_VALUE_TYPE_CLASS_NAME = |
| "org.apache.qpid.server.model.ManagedAttributeValueType"; |
| |
| public static final String MANAGED_ATTRIBUTE_VALUE_CLASS_NAME = |
| "org.apache.qpid.server.model.ManagedAttributeValue"; |
| |
| @Override |
| public SourceVersion getSupportedSourceVersion() |
| { |
| return SourceVersion.latest(); |
| } |
| |
| @Override |
| public boolean process(final Set<? extends TypeElement> annotations, final RoundEnvironment roundEnv) |
| { |
| Elements elementUtils = processingEnv.getElementUtils(); |
| TypeElement annotationElement = elementUtils.getTypeElement(MANAGED_ATTRIBUTE_VALUE_TYPE_CLASS_NAME); |
| |
| for (Element e : roundEnv.getElementsAnnotatedWith(annotationElement)) |
| { |
| checkAnnotationIsOnInterface(annotationElement, e); |
| checkAllMethodsAreAccessors(e); |
| } |
| return false; |
| } |
| |
| private void checkAllMethodsAreAccessors(final Element e) |
| { |
| checkAllMethodsAreAccessors(e, new HashSet<Element>()); |
| } |
| |
| private void checkAllMethodsAreAccessors(final Element e, Set<Element> checked) |
| { |
| |
| if(!checked.add(e)) |
| { |
| return; |
| } |
| |
| final Name annotationName = processingEnv.getElementUtils() |
| .getTypeElement(MANAGED_ATTRIBUTE_VALUE_TYPE_CLASS_NAME) |
| .getSimpleName(); |
| |
| for(Element memberElement : e.getEnclosedElements()) |
| { |
| if(memberElement instanceof ExecutableElement) |
| { |
| final ExecutableElement methodElement = (ExecutableElement) memberElement; |
| AttributeAnnotationValidator.isValidType(processingEnv, methodElement.getReturnType(), false); |
| String methodName = methodElement.getSimpleName().toString(); |
| |
| if (methodName.length() < 3 |
| || (methodName.length() < 4 && !methodName.startsWith("is")) |
| || !(methodName.startsWith("is") || methodName.startsWith("get") || methodName.startsWith("has")) |
| || !methodElement.getTypeParameters().isEmpty() ) |
| { |
| processingEnv.getMessager() |
| .printMessage(Diagnostic.Kind.ERROR, |
| "Methods in an @" + annotationName |
| + " interface can only be applied to methods which of the form getXXX(), isXXX() or hasXXX()", |
| methodElement |
| ); |
| } |
| } |
| } |
| final List<? extends TypeMirror> interfaces = ((TypeElement) e).getInterfaces(); |
| for(TypeMirror mirror : interfaces) |
| { |
| checkAllMethodsAreAccessors(processingEnv.getTypeUtils().asElement(mirror), checked); |
| } |
| } |
| |
| public void checkAnnotationIsOnInterface(final TypeElement annotationElement, final Element e) |
| { |
| if (e.getKind() != ElementKind.INTERFACE) |
| { |
| processingEnv.getMessager() |
| .printMessage(Diagnostic.Kind.ERROR, |
| "@" |
| + annotationElement.getSimpleName() |
| + " can only be applied to an interface", |
| e |
| ); |
| } |
| if(!processingEnv.getTypeUtils().isAssignable(e.asType(), processingEnv.getElementUtils().getTypeElement(MANAGED_ATTRIBUTE_VALUE_CLASS_NAME).asType())) |
| { |
| processingEnv.getMessager() |
| .printMessage(Diagnostic.Kind.ERROR, |
| "@" |
| + annotationElement.getSimpleName() |
| + " can only be applied to an interface", |
| e |
| ); |
| } |
| } |
| |
| } |