Factory Method Design Pattern, in Swift 3.0

Inspired on github ochococo/Design-Patterns-In-Swift

Definition

The factory pattern is used to replace class constructors, abstracting the process of object generation so that the type of the object instantiated can be determined at run-time.

Pattern Diagram

Class Diagram for Currency Factory example (@ochococo)

Implementation Details

I implemented a second example, the one present in Design Patterns book by Head First. An implementation in Java can be found in adagio/PizzaStores - factory method branch

There is a slight difference, between this two examples. The one from Head First considers Creator and Concrete Creator classes. We have implemented NYStylePizzaStore, but not a PizzaStore protocol.

Another implementations

• Factory Method, by 5Neo.Be. AppleProductCreator, iPhoneProductCreator, AppleProduct, iPadProduct...
• Factory Method, by zsergey st github. Developer Factory, SwiftDeveloperFactory, ObjCDeveloperFactory, Languages...
• The Factory Method Pattern, by Jeremy Kaczmarczyk. GameCreator, Game, Basketball1on1, StreetBasketball2on2...