public  void engage(CodeGenConfiguration configuration) 
{
        
        //test the databinding type. If not just fall through
        if (testFallThrough(configuration.getDatabindingType())) {
            return;
        }
        try {
            // try dummy load of framework classes first to check missing jars
            try {
                ClassLoader cl = getClass().getClassLoader();
                cl.loadClass(JAXB_RI_API_CLASS);
                cl.loadClass(JAXB_RI_IMPL_CLASS);
                cl.loadClass(JAXB_RI_XJC_CLASS);
            } catch (ClassNotFoundException e) {
                throw new RuntimeException("JAX-B RI JARs not on classpath");
            }
            // load the actual utility class
            Class clazz = null;
            try {
                clazz = JAXBRIExtension.class.getClassLoader().loadClass(JAXB_RI_UTILITY_CLASS);
            } catch (ClassNotFoundException e) {
                throw new RuntimeException("JAX-B RI binding extension not in classpath");
            }
            // invoke utility class method for actual processing
            Method method = clazz.getMethod(JAXB_RI_PROCESS_METHOD,
                                            new Class[] { List.class, Element[].class,
                                                    CodeGenConfiguration.class });
            List schemas = new ArrayList();
            List axisServices = configuration.getAxisServices();
            AxisService axisService = null;
            for (Iterator iter = axisServices.iterator(); iter.hasNext();) {
                axisService = (AxisService)iter.next();
                schemas.addAll(axisService.getSchema());
            }
            Element[] additionalSchemas = loadAdditionalSchemas();
            TypeMapper mapper = (TypeMapper)method.invoke(null,
                                                          new Object[] { schemas, additionalSchemas,
                                                                  configuration });
            // set the type mapper to the config
            configuration.setTypeMapper(mapper);
        } catch (Exception e) {
            if (e instanceof RuntimeException) {
                throw (RuntimeException)e;
            } else {
                throw new RuntimeException(e);
            }
        }
}