merchantCodes = callback.getMerchantCodes().iterator();
Collection codeResults = new ArrayList();
while (merchantCodes.hasNext()) {
code = (MerchantCodeString) merchantCodes.next();
CouponResult coupon = new CouponResult(false, 0.0f,
merchantConstants.getCurrencyCode(),
code.getCode(), "Not supported in this example.");
codeResults.add(coupon);
}