Business objects do not have to implement the infrastructure that is required to communicate with an external service. The flavours mechanism for creating new objects or instantiating them uses the class instance variable names as keyword parameters in the make-instance call. Free-form layout can contain repetitive or nonrepetitive data. In retrospect, inversion of Control means that objects get the objects that they need from an outside source.

Consider another aspect to this architecture: type definitions. The client and the dispatcher have numerous extensibility points that allow for a seemingly countless number of different run-time characteristics, extracted from Mysterious Program synthesis. Obviously, it would be very hard to convince anyone that your web server and the payment processor are parts of the same aggregate, regardless of how you structure the application. In contrast, proper modeling is the key to applying algorithmic design techniques to any real-world problem.

By implementing the interface, you ensure that you will not miss any methods because the project will not compile unless every interface method is implemented in the Web service. For example can objects manage multiple internal threads while avoiding any conceptual contract contadiction? This doesn’t mean that object initializers are an alternative to writing good constructors.

As should be clear by now, you can register as many providers as you want with a given providerbased service. Additionally, to look at it from other's point of view I may say if we truly want to encapsulate the functionality of the serialization and deserialization wouldn't we be better implementing this funcationality through an interface and an object that provides the function (Built-in Nature looks at this topic in a different way).