Using the Domain Model pattern - POJOs in Action: Developing Enterprise Applications with Lightweight Frameworks - page 90

change many methods to take repositories as parameters in order to pass them
from the services, which obtain them via constructor injection, to the methods
that use them.
In this example, passing RestaurantRepository to PendingOrder requires only
minor changes. We just need to change PlaceOrderService (in listing 3.3) to pass
RestaurantRepository as an argument to PendingOrder.updateDeliveryInfo() ,
which in turn requires PlaceOrderService 's constructor to take it as a parameter.
Listing 3.6 shows the PendingOrder.updateDeliveryInfo() method.

Listing 3.6 PendingOrder

public class PendingOrder {

private Date deliveryTime;
private Address deliveryAddress;

public boolean updateDeliveryInfo(
RestaurantRepository restaurantRepository,
Address deliveryAddress,
Date deliveryTime) {

Calendar earliestDeliveryTime = Calendar.getInstance();
earliestDeliveryTime.add(Calendar.HOUR, 1);
if (deliveryTime.before(earliestDeliveryTime.getTime()))
bbbbbb b bb return false;

if (restaurantRepository
.isRestaurantAvailable(deliveryAddress, deliveryTime)) {
this.deliveryAddress = deliveryAddress;
this.deliveryTime = deliveryTime;
return true;
} else
return false;
}
}

This method calls the RestaurantRepository.isRestaurantAvailable() method
and, if it succeeds, updates PendingOrder with the delivery information.
In order to get this class to compile, we need to define the isRestaurantAvail-
able() method:

public interface RestaurantRepository {
boolean isRestaurantAvailable(Address deliveryAddress,
Date deliveryTime)
…
}