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

import java.lang.annotation.Annotation;
import jakarta.ejb.ConcurrencyManagement;
import jakarta.ejb.ConcurrencyManagementType;

import com.sun.enterprise.deployment.EjbDescriptor;
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.EjbSessionDescriptor;
import org.jvnet.hk2.annotations.Service;

/**
 * This handler is responsible for handling the jakarta.ejb.ConcurrencyManagement.
 *
 * @author Kenneth Saks
 */
@Service
@AnnotationHandlerFor(ConcurrencyManagement.class)
public class ConcurrencyManagementHandler extends AbstractAttributeHandler {

    public ConcurrencyManagementHandler() {
    }

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

        ConcurrencyManagement cmAn = (ConcurrencyManagement) ainfo.getAnnotation();

        ConcurrencyManagementType cmType = cmAn.value();

        for (EjbContext ejbContext : ejbContexts) {
            EjbDescriptor ejbDesc = ejbContext.getDescriptor();
            if (ejbDesc instanceof EjbSessionDescriptor) {

                EjbSessionDescriptor.ConcurrencyManagementType descCMType;

                switch(cmType) {
                    case CONTAINER :
                        descCMType = EjbSessionDescriptor.ConcurrencyManagementType.Container;
                        break;
                    case BEAN :
                        descCMType = EjbSessionDescriptor.ConcurrencyManagementType.Bean;
                        break;
                    default :
                        throw new AnnotationProcessorException("Unsupported concurrency management " +
                                "type = " + cmType);

                }

                EjbSessionDescriptor sDesc = (EjbSessionDescriptor) ejbDesc;

                // Set value on descriptor unless it has been set by .xml
                sDesc.setConcurrencyManagementTypeIfNotSet(descCMType);

            }
        }

        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();
    }

    protected boolean supportTypeInheritance() {
        return true;
    }
}