public static Customer addOrdersFromDB(Customer c) {
   Customer newCustomer = new Customer(c.getID());
   List<Order> orders = orderDAO.retrieveOrders(c);
   for (Order o : orders) {
     newCustomer.addOrder(o);
   }
   return newCustomer;
 }
 public List<Order> retrieveOrdersFromDB(Customer c) {
   return orderDAO.retrieveOrders(c);
 }