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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.Constructor;
import java.lang.reflect.Method;
import javax.interceptor.ExcludeDefaultInterceptors;

import com.sun.enterprise.deployment.MethodDescriptor;
import com.sun.enterprise.deployment.annotation.context.EjbContext;
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.EjbBundleDescriptorImpl;
import org.glassfish.ejb.deployment.descriptor.EjbDescriptor;
import org.glassfish.ejb.deployment.descriptor.InterceptorBindingDescriptor;
import org.jvnet.hk2.annotations.Service;

/**
 * This handler is responsible for handling the 
 * javax.ejb.ExcludeDefaultInterceptors annotation.
 *
 */
@Service
@AnnotationHandlerFor(ExcludeDefaultInterceptors.class)
public class ExcludeDefaultInterceptorsHandler 
    extends AbstractAttributeHandler {
    
    public ExcludeDefaultInterceptorsHandler() {
    }

    protected boolean supportTypeInheritance() {
        return true;
    }

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

         EjbBundleDescriptorImpl ejbBundle =
             ((EjbDescriptor)ejbContexts[0].getDescriptor()).
                 getEjbBundleDescriptor();
        
         for(EjbContext next : ejbContexts) {

            EjbDescriptor ejbDescriptor = (EjbDescriptor) next.getDescriptor();

            // Create binding information.  
            InterceptorBindingDescriptor binding = 
                new InterceptorBindingDescriptor();

            binding.setEjbName(ejbDescriptor.getName());

            binding.setExcludeDefaultInterceptors(true);
            
            if(ElementType.METHOD.equals(ainfo.getElementType())) {
                Method m = (Method) ainfo.getAnnotatedElement();
                MethodDescriptor md = 
                    new MethodDescriptor(m, MethodDescriptor.EJB_BEAN);
                binding.setBusinessMethod(md);
            } else if(ElementType.CONSTRUCTOR.equals(ainfo.getElementType())) {
                Constructor c = (Constructor) ainfo.getAnnotatedElement();
                Class cl = c.getDeclaringClass();
                Class[] ctorParamTypes = c.getParameterTypes();
                String[] parameterClassNames = (new MethodDescriptor()).getParameterClassNamesFor(null, ctorParamTypes);
                MethodDescriptor md = new MethodDescriptor(cl.getSimpleName(), null,
                        parameterClassNames, MethodDescriptor.EJB_BEAN);
                binding.setBusinessMethod(md);
            }

            ejbBundle.prependInterceptorBinding(binding);
        }

        return getDefaultProcessedResult();
    }

    /**
     * @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();
    }
}