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package org.glassfish.ejb.deployment.annotation.handlers;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.reflect.AnnotatedElement;
import java.util.logging.Level;
import com.sun.enterprise.deployment.annotation.context.ComponentContext;
import com.sun.enterprise.deployment.annotation.context.EjbBundleContext;
import com.sun.enterprise.deployment.annotation.context.EjbContext;
import com.sun.enterprise.deployment.annotation.context.EjbInterceptorContext;
import com.sun.enterprise.deployment.annotation.context.EjbsContext;
import com.sun.enterprise.deployment.annotation.handlers.AbstractHandler;
import com.sun.enterprise.util.LocalStringManagerImpl;
import org.glassfish.apf.AnnotatedElementHandler;
import org.glassfish.apf.AnnotationInfo;
import org.glassfish.apf.AnnotationProcessorException;
import org.glassfish.apf.HandlerProcessingResult;
/**
* This is an abstract class encapsulate generic behaviour of annotation
* handler applying on Ejb Class. It will get the corresponding
* EjbDescriptors associated to the annotation on the given Ejb Class
* and then pass it to underlying processAnnotation method.
* Concrete subclass handlers need to implement the following:
* public Class<? extends Annotation> getAnnotationType();
* protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
* EjbContext[] ejbContexts) throws AnnotationProcessorException;
* It may also need to override the following:
* a) if other annotations need to be processed prior to given annotation:
* public Class<? extends Annotation>[] getTypeDependencies();
* b) if the given annotation can be processed while processing another
* annotation
* protected boolean isDelegatee();
* c) if we need to process for interceptor
* protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
* EjbInterceptorContext ejbInterceptorContext)
* throws AnnotationProcessorException;
* d) indicate the annotation support type inheritance
* protected boolean supportTypeIneritance();
*
* @author Shing Wai Chan
*/
public abstract class AbstractAttributeHandler extends AbstractHandler {
protected final static LocalStringManagerImpl localStrings =
new LocalStringManagerImpl(AbstractAttributeHandler.class);
/**
* Process Annotation with given EjbContexts.
* @param ainfo
* @param ejbContexts
* @return HandlerProcessingResult
* @exception AnnotationProcessorException
*/
protected abstract HandlerProcessingResult processAnnotation(
AnnotationInfo ainfo, EjbContext[] ejbContexts)
throws AnnotationProcessorException;
/**
* Process Annotation with given InteceptorContext.
* @param ainfo
* @param ejbInterceptorContext
* @return HandlerProcessingResult
* @exception AnnotationProcessorException
*/
protected HandlerProcessingResult processAnnotation(
AnnotationInfo ainfo, EjbInterceptorContext ejbInterceptorContext)
throws AnnotationProcessorException {
if (!isDelegatee()) {
throw new UnsupportedOperationException();
}
return getDefaultProcessedResult();
}
/**
* Process a particular annotation which type is the same as the
* one returned by @see getAnnotationType(). All information
* pertinent to the annotation and its context is encapsulated
* in the passed AnnotationInfo instance.
* This is a method in interface AnnotationHandler.
*
* @param ainfo the annotation information
*/
public HandlerProcessingResult processAnnotation(AnnotationInfo ainfo)
throws AnnotationProcessorException {
AnnotatedElement ae = ainfo.getAnnotatedElement();
Annotation annotation = ainfo.getAnnotation();
if (logger.isLoggable(Level.FINER)) {
logger.finer("@process annotation " + annotation + " in " + ae);
}
AnnotatedElementHandler aeHandler = ainfo.getProcessingContext().getHandler();
if (aeHandler instanceof EjbBundleContext) {
EjbBundleContext ejbBundleContext = (EjbBundleContext)aeHandler;
AnnotatedElementHandler aeh = ejbBundleContext.createContextForEjb();
if (aeh != null) {
aeHandler = aeh;
} else {
if (isDelegatee()) {
aeHandler = ejbBundleContext.createContextForEjbInterceptor();
}
if (aeHandler == null) {
return getInvalidAnnotatedElementHandlerResult(null, ainfo);
}
}
}
if (!supportTypeInheritance() &&
ElementType.TYPE.equals(ainfo.getElementType()) &&
aeHandler instanceof ComponentContext) {
ComponentContext context = (ComponentContext)aeHandler;
Class clazz = (Class)ainfo.getAnnotatedElement();
if (!clazz.getName().equals(context.getComponentClassName())) {
if (logger.isLoggable(Level.WARNING)) {
log(Level.WARNING, ainfo,
localStrings.getLocalString(
"enterprise.deployment.annotation.handlers.typeinhernotsupp",
"The annotation symbol inheritance is not supported."));
}
return getDefaultProcessedResult();
}
}
EjbContext[] ejbContexts = null;
EjbInterceptorContext ejbInterceptorContext = null;
if (aeHandler instanceof EjbContext) {
EjbContext ejbContext = (EjbContext)aeHandler;
ejbContexts = new EjbContext[] { ejbContext };
} else if (aeHandler instanceof EjbsContext) {
ejbContexts = ((EjbsContext)aeHandler).getEjbContexts();
} else if (isDelegatee() && aeHandler instanceof EjbInterceptorContext) {
ejbInterceptorContext = (EjbInterceptorContext)aeHandler;
} else {
return getInvalidAnnotatedElementHandlerResult(aeHandler, ainfo);
}
HandlerProcessingResult procResult = null;
if (ejbInterceptorContext != null) {
procResult = processAnnotation(ainfo, ejbInterceptorContext);
} else {
procResult = processAnnotation(ainfo, ejbContexts);
}
if (logger.isLoggable(Level.FINER)) {
logger.finer("New annotation for " + annotation);
}
return procResult;
}
/**
* This indicates whether the annotation can be processed by delegation
* from the another annotation.
*/
protected boolean isDelegatee() {
return false;
}
/**
* This indicates whether the annotation type should be processed for
* type level in super-class.
*/
protected boolean supportTypeInheritance() {
return false;
}
}