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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.lang.reflect.Field;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.MessageDriven;
import javax.ejb.Stateful;
import javax.ejb.Stateless;
import com.sun.enterprise.deployment.annotation.AnnotatedElementHandler;
import com.sun.enterprise.deployment.annotation.AnnotationHandler;
import com.sun.enterprise.deployment.annotation.AnnotationInfo;
import com.sun.enterprise.deployment.annotation.AnnotationProcessorException;
import com.sun.enterprise.deployment.annotation.HandlerProcessingResult;
import com.sun.enterprise.deployment.annotation.ResultType;
import com.sun.enterprise.deployment.annotation.impl.AnnotationUtils;
import com.sun.enterprise.deployment.annotation.impl.HandlerProcessingResultImpl;
import com.sun.enterprise.util.LocalStringManagerImpl;
/**
* This is an abstract base class for Handlers.
* Concrete subclass need to implements the following methods:
* public Class<? extends Annotation> getAnnotationType();
* public HandlerProcessingResult processAnnotation(AnnotationInfo ainfo)
* throws AnnotationProcessorException;
*
* @author Shing Wai Chan
*/
public abstract class AbstractHandler implements AnnotationHandler {
protected final static LocalStringManagerImpl localStrings =
new LocalStringManagerImpl(AbstractHandler.class);
protected Logger logger = AnnotationUtils.getLogger();
/**
* @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 null;
}
// ----- end of implements AnnotationHandler -----
/**
* @return a default processed result
*/
protected HandlerProcessingResult getDefaultProcessedResult() {
return HandlerProcessingResultImpl.getDefaultResult(
getAnnotationType(), ResultType.PROCESSED);
}
/**
* @return a default failed result
*/
protected HandlerProcessingResult getDefaultFailedResult() {
return HandlerProcessingResultImpl.getDefaultResult(
getAnnotationType(), ResultType.FAILED);
}
/**
* @param aeHandler
* @param ainfo
* @return a result for invalid AnnotatedElementHandler
*/
protected HandlerProcessingResult getInvalidAnnotatedElementHandlerResult(
AnnotatedElementHandler aeHandler, AnnotationInfo ainfo)
throws AnnotationProcessorException {
if (logger.isLoggable(Level.FINE)) {
log(Level.FINE, ainfo,
localStrings.getLocalString(
"enterprise.deployment.annotation.handlers.invalidaehandler",
"Invalid annotation symbol found for this type of class."));
}
if (logger.isLoggable(Level.FINER)) {
logger.finer("Invalid AnnotatedElementHandler: " + aeHandler);
}
return getDefaultProcessedResult();
}
protected void log(Level level, AnnotationInfo ainfo,
String localizedMessage) throws AnnotationProcessorException {
if (Level.SEVERE.equals(level)) {
ainfo.getProcessingContext().getErrorHandler().error(
new AnnotationProcessorException(localizedMessage, ainfo));
} else if (Level.WARNING.equals(level)) {
ainfo.getProcessingContext().getErrorHandler().warning(
new AnnotationProcessorException(localizedMessage, ainfo));
} else if (Level.FINE.equals(level)) {
ainfo.getProcessingContext().getErrorHandler().fine(
new AnnotationProcessorException(localizedMessage, ainfo));
} else if (ainfo != null) {
ainfo.getProcessingContext().getProcessor().log(
level, ainfo, localizedMessage);
} else {
logger.log(level, localizedMessage);
}
}
protected String getInjectionMethodPropertyName(Method method,
AnnotationInfo ainfo) throws AnnotationProcessorException
{
String methodName = method.getName();
String propertyName = methodName;
if( (methodName.length() > 3) &&
methodName.startsWith("set") ) {
// Derive javabean property name.
propertyName =
methodName.substring(3, 4).toLowerCase() +
methodName.substring(4);
} else {
throw new AnnotationProcessorException(
localStrings.getLocalString(
"enterprise.deployment.annotation.handlers.invalidinjectionmethodname",
"Injection method name must start with \"set\""),
ainfo);
}
return propertyName;
}
/**
* Check if given method is a valid injection method.
* Throw Exception if it is not.
* @exception AnnotationProcessorException
*/
protected void validateInjectionMethod(Method method, AnnotationInfo ainfo)
throws AnnotationProcessorException {
if (method.getParameterTypes().length!=1){
throw new AnnotationProcessorException(
localStrings.getLocalString(
"enterprise.deployment.annotation.handlers.invalidinjectionmethod",
"Injection on a method requires a JavaBeans setter method type with one parameter "),
ainfo);
}
if (!void.class.equals(method.getReturnType())) {
throw new AnnotationProcessorException(
localStrings.getLocalString(
"enterprise.deployment.annotation.handlers.injectionmethodmustreturnvoid",
"Injection on a method requires a void return type"),
ainfo);
}
}
protected HandlerProcessingResult getOverallProcessingResult(
List<HandlerProcessingResult> resultList) {
HandlerProcessingResult overallProcessingResult = null;
for (HandlerProcessingResult result : resultList) {
if (overallProcessingResult == null ||
(result.getOverallResult().compareTo(
overallProcessingResult.getOverallResult()) > 0)) {
overallProcessingResult = result;
}
}
return overallProcessingResult;
}
/**
* This is called by getTypeDependencies().
* @return an array of all ejb annotation types
*/
protected Class<? extends Annotation>[] getEjbAnnotationTypes() {
return new Class[] {
MessageDriven.class, Stateful.class, Stateless.class };
}
}
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