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package org.glassfish.ejb.deployment.annotation.handlers;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import javax.ejb.PrePassivate;

import com.sun.enterprise.deployment.EjbInterceptor;
import com.sun.enterprise.deployment.LifecycleCallbackDescriptor;
import com.sun.enterprise.deployment.annotation.context.EjbContext;
import com.sun.enterprise.deployment.annotation.context.EjbInterceptorContext;
import org.glassfish.apf.AnnotationHandlerFor;
import org.glassfish.apf.AnnotationInfo;
import org.glassfish.apf.AnnotationProcessorException;
import org.glassfish.apf.HandlerProcessingResult;
import org.glassfish.ejb.deployment.descriptor.EjbSessionDescriptor;
import org.jvnet.hk2.annotations.Service;

/**
 * This handler is responsible for handling javax.ejb.PrePassivate 
 *
 */
@Service
@AnnotationHandlerFor(PrePassivate.class)
public class PrePassivateHandler extends AbstractAttributeHandler {
    
    public PrePassivateHandler() {
    }

    protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
            EjbContext[] ejbContexts) throws AnnotationProcessorException {

        for(EjbContext next : ejbContexts) {
            
            EjbSessionDescriptor ejbSessionDescriptor = 
                (EjbSessionDescriptor) next.getDescriptor();

            ejbSessionDescriptor.addPrePassivateDescriptor(
                getPrePassivateDescriptor(ainfo));
            
        }
        
        return getDefaultProcessedResult();
    }

    protected HandlerProcessingResult processAnnotation(AnnotationInfo ainfo,
            EjbInterceptorContext ejbInterceptorContext)
            throws AnnotationProcessorException {
        EjbInterceptor ejbInterceptor =  ejbInterceptorContext.getDescriptor();
        ejbInterceptor.addPrePassivateDescriptor(
            getPrePassivateDescriptor(ainfo));
        return getDefaultProcessedResult();
    }

    private LifecycleCallbackDescriptor getPrePassivateDescriptor(
            AnnotationInfo ainfo) {
        Method annotatedMethod = (Method) ainfo.getAnnotatedElement();
        LifecycleCallbackDescriptor prePassivate = 
                new LifecycleCallbackDescriptor();
        prePassivate.setLifecycleCallbackClass(annotatedMethod.getDeclaringClass().getName());
        prePassivate.setLifecycleCallbackMethod(annotatedMethod.getName());
        return prePassivate;
    }


    /**
     * @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[] getTypeDependencies() {
        return getEjbAnnotationTypes();
    }

    protected boolean isDelegatee() {
        return true;
    }
}