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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.ArrayList;
import java.util.List;

import javax.persistence.PersistenceUnit;
import javax.persistence.PersistenceUnits;

import com.sun.enterprise.deployment.annotation.HandlerProcessingResult;
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.context.ResourceContainerContext;

/**
 * This handler is responsible for handling the 
 * javax.persistence.PersistenceUnits annotation.
 *
 */
public class EntityManagerFactoryReferencesHandler 
    extends EntityManagerFactoryReferenceHandler {
    
    public EntityManagerFactoryReferencesHandler() {
    }
    
    /**
     * @return the annoation type this annotation handler is handling
     */
    public Class<? extends Annotation> getAnnotationType() {
        return PersistenceUnits.class;
    }    
        

    protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
            ResourceContainerContext[] rcContexts)
            throws AnnotationProcessorException {

        PersistenceUnits annotation = (PersistenceUnits) ainfo.getAnnotation();
        
        PersistenceUnit[] emfRefAnnotations = annotation.value();
        List<HandlerProcessingResult> results = new ArrayList<HandlerProcessingResult>();

        for(PersistenceUnit emfRef : emfRefAnnotations) {
            results.add(processEmfRef(ainfo, rcContexts, emfRef));
        }

        return getOverallProcessingResult(results);
    }

}
