private LifecycleHandler findLifecycleHandler( ComponentDescriptor descriptor )
throws UndefinedLifecycleHandlerException
{
String lifecycleHandlerId = descriptor.getLifecycleHandler();
LifecycleHandler lifecycleHandler;
if ( lifecycleHandlerId == null )
{
lifecycleHandler = lifecycleHandlerManager.getDefaultLifecycleHandler();
}