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package com.sun.enterprise.deployment.annotation.handlers;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.util.Set;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.ejb.Timeout;
import javax.ejb.TransactionManagement;
import javax.ejb.MessageDriven;
import javax.ejb.Stateful;
import javax.ejb.Stateless;
import com.sun.enterprise.util.TypeUtil;
import com.sun.enterprise.deployment.ContainerTransaction;
import com.sun.enterprise.deployment.EjbDescriptor;
import com.sun.enterprise.deployment.MethodDescriptor;
import com.sun.enterprise.deployment.annotation.AnnotationInfo;
import com.sun.enterprise.deployment.annotation.AnnotatedElementHandler;
import com.sun.enterprise.deployment.annotation.AnnotationProcessorException;
import com.sun.enterprise.deployment.annotation.HandlerProcessingResult;
import com.sun.enterprise.deployment.annotation.context.EjbContext;
/**
* This handler is responsible for handling the javax.ejb.TransactionAttribute.
*
* @author Shing Wai Chan
*/
public class TransactionAttributeHandler extends AbstractAttributeHandler
implements PostProcessor {
public TransactionAttributeHandler() {
}
/**
* @return the annoation type this annotation handler is handling
*/
public Class<? extends Annotation> getAnnotationType() {
return TransactionAttribute.class;
}
protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
EjbContext[] ejbContexts) throws AnnotationProcessorException {
TransactionAttribute taAn =
(TransactionAttribute) ainfo.getAnnotation();
for (EjbContext ejbContext : ejbContexts) {
EjbDescriptor ejbDesc = ejbContext.getDescriptor();
ContainerTransaction containerTransaction =
getContainerTransaction(taAn.value());
if (ElementType.TYPE.equals(ainfo.getElementType())) {
ejbContext.addPostProcessInfo(ainfo, this);
} else {
Method annMethod = (Method) ainfo.getAnnotatedElement();
Set txBusMethods = ejbDesc.getTxBusinessMethodDescriptors();
for (Object next : txBusMethods) {
MethodDescriptor nextDesc = (MethodDescriptor) next;
Method m = nextDesc.getMethod(ejbDesc);
if( TypeUtil.sameMethodSignature(m, annMethod) &&
ejbDesc.getContainerTransactionFor(nextDesc) == null ) {
// override by xml
ejbDesc.setContainerTransactionFor
(nextDesc, containerTransaction);
}
}
}
}
return getDefaultProcessedResult();
}
private ContainerTransaction getContainerTransaction(
TransactionAttributeType taType) {
switch(taType) {
case MANDATORY:
return new ContainerTransaction(
ContainerTransaction.MANDATORY,
ContainerTransaction.MANDATORY);
case REQUIRED:
return new ContainerTransaction(
ContainerTransaction.REQUIRED,
ContainerTransaction.REQUIRED);
case REQUIRES_NEW:
return new ContainerTransaction(
ContainerTransaction.REQUIRES_NEW,
ContainerTransaction.REQUIRES_NEW);
case SUPPORTS:
return new ContainerTransaction(
ContainerTransaction.SUPPORTS,
ContainerTransaction.SUPPORTS);
case NOT_SUPPORTED:
return new ContainerTransaction(
ContainerTransaction.NOT_SUPPORTED,
ContainerTransaction.NOT_SUPPORTED);
default: // NEVER
return new ContainerTransaction(
ContainerTransaction.NEVER,
ContainerTransaction.NEVER);
}
}
/**
* @return an array of annotation types this annotation handler would
* require to be processed (if present) before it processes it's own
* annotation type.
*/
public Class<? extends Annotation>[] getTypeDependencies() {
return new Class[] {
MessageDriven.class, Stateful.class, Stateless.class,
Timeout.class, TransactionManagement.class};
}
protected boolean supportTypeInheritance() {
return true;
}
public void postProcessAnnotation(AnnotationInfo ainfo,
AnnotatedElementHandler aeHandler)
throws AnnotationProcessorException {
EjbContext ejbContext = (EjbContext)aeHandler;
EjbDescriptor ejbDesc = ejbContext.getDescriptor();
TransactionAttribute taAn =
(TransactionAttribute) ainfo.getAnnotation();
ContainerTransaction containerTransaction =
getContainerTransaction(taAn.value());
Class classAn = (Class)ainfo.getAnnotatedElement();
Set txBusMethods = ejbDesc.getTxBusinessMethodDescriptors();
for (Object mdObj : txBusMethods) {
MethodDescriptor md = (MethodDescriptor)mdObj;
// override by xml
if (classAn.equals(ejbContext.getDeclaringClass(md)) &&
ejbDesc.getContainerTransactionFor(md) == null) {
ejbDesc.setContainerTransactionFor(
md, containerTransaction);
}
}
}
}