Date startDate = RequestUtil.getDate(getRequestAttributes().get("startDate"));
Date endDate = RequestUtil.getDate(getRequestAttributes().get("endDate"));
Promo promo = coreManager.getPromo(productId, startDate, endDate);
DisplayPromo disp = null;
if(promo != null){
disp = mapper.map(promo, DisplayPromo.class);
}