/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.enterprise.deployment.annotation.factory;
import org.glassfish.apf.AnnotationHandler;
import org.glassfish.apf.AnnotationInfo;
import org.glassfish.apf.AnnotationProcessor;
import org.glassfish.apf.AnnotationProcessorException;
import org.glassfish.apf.HandlerProcessingResult;
import org.glassfish.apf.factory.Factory;
import org.glassfish.apf.impl.AnnotationProcessorImpl;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.utilities.BuilderHelper;
import org.jvnet.hk2.annotations.Service;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.lang.annotation.Annotation;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* This factory is responsible for initializing a ready to use
* AnnotationProcessor.
*
* @author Shing Wai Chan
*/
@Service
@Singleton
public class SJSASFactory extends Factory {
@Inject
private ServiceLocator locator;
private Set<String> annotationClassNames = new HashSet<String>();
private AnnotationProcessorImpl systemProcessor=null;
public AnnotationProcessor getAnnotationProcessor() {
AnnotationProcessorImpl processor =
Factory.getDefaultAnnotationProcessor();
processor.setDelegate(systemProcessor);
return processor;
}
@SuppressWarnings("unchecked")
public Set<String> getAnnotations() {
return (HashSet<String>)((HashSet<String>)annotationClassNames).clone();
}
private static String getAnnotationHandlerForStringValue(ActiveDescriptor<AnnotationHandler> onMe) {
Map<String, List<String>> metadata = onMe.getMetadata();
List<String> answers = metadata.get(AnnotationHandler.ANNOTATION_HANDLER_METADATA);
if (answers == null || answers.isEmpty()) return null;
return answers.get(0);
}
@SuppressWarnings({ "unused", "unchecked" })
@PostConstruct
private void postConstruct() {
if (systemProcessor != null) return;
// initialize our system annotation processor...
systemProcessor = new AnnotationProcessorImpl();
for (ActiveDescriptor<?> i : locator.getDescriptors(BuilderHelper.createContractFilter(
AnnotationHandler.class.getName()))) {
ActiveDescriptor<AnnotationHandler> descriptor = (ActiveDescriptor<AnnotationHandler>) i;
String annotationTypeName = getAnnotationHandlerForStringValue(descriptor);
if (annotationTypeName == null) continue;
systemProcessor.pushAnnotationHandler(annotationTypeName, new LazyAnnotationHandler(descriptor));
annotationClassNames.add("L" +
annotationTypeName.
replace('.', '/') + ";");
}
}
private class LazyAnnotationHandler implements AnnotationHandler {
private final ActiveDescriptor<AnnotationHandler> descriptor;
private AnnotationHandler handler;
private LazyAnnotationHandler(ActiveDescriptor<AnnotationHandler> descriptor) {
this.descriptor = descriptor;
}
private AnnotationHandler getHandler() {
if (handler != null) return handler;
handler = locator.getServiceHandle(descriptor).getService();
return handler;
}
@Override
public Class<? extends Annotation> getAnnotationType() {
return getHandler().getAnnotationType();
}
@Override
public HandlerProcessingResult processAnnotation(
AnnotationInfo element) throws AnnotationProcessorException {
return getHandler().processAnnotation(element);
}
@Override
public Class<? extends Annotation>[] getTypeDependencies() {
return getHandler().getTypeDependencies();
}
}
}