if (cart.containsItemId(workingItemId))
cart.incrementQuantityByItemId(workingItemId);
else {
Item toAddItem = _catalogControl.getItem(workingItemId);
if (toAddItem != null)
cart.addItem(toAddItem);
}
_cartForm = new CartForm();
_cartForm.setCart(lookupCart());
Forward forward = setupCartForward();