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package com.sun.enterprise.registration;

import java.lang.reflect.Constructor;
import java.lang.IllegalAccessException;
import java.lang.reflect.InvocationTargetException;

public class RegistrationServiceFactory {
    
    /** 
     * Creates a new instance of RegistrationServiceFactory. 
     */
    private RegistrationServiceFactory() {
    }
    
    /**
     * Returns the singleton instance of this factory.
     *
     * @return  singleton instance of this factory
     */
    public static RegistrationServiceFactory getInstance() {
        if (instance == null)
            instance = new RegistrationServiceFactory();
        return instance;
    }

    public RegistrationService getRegistrationService(RegistrationServiceConfig rc) 
        throws ClassNotFoundException, NoSuchMethodException, InstantiationException, 
                IllegalAccessException, InvocationTargetException {
        
        Class registrationClass = Class.forName(rc.getClassName());
        if (rc.getParams() != null) {
            Class[] types = {RegistrationServiceConfig.class};
            Constructor constructor = registrationClass.getConstructor(types);        
            return (RegistrationService) constructor.newInstance(new Object[] {rc} );            
        }
        return (RegistrationService)registrationClass.newInstance();
    }
    
    private static volatile RegistrationServiceFactory instance = null;
}