The Abstract Factory Pattern

The Abstract Factory Pattern

Defined

The Abstract Factory Pattern  provides an interface for creating families of related or dependent objects without specified their concrete classes.

Diagrams

Use whenever you have families of products you need to create and you want to make sure your clients create products that belong together.

Bullet Points

• All factories encapsulate object creation.
• Simple Factory, while not a bonafide design pattern, is a simple way to decouple your clients from concrete classes.
• Factory Method relies on inheritance: object creation is delegated to subclasses which implement the the factory method to create objects.
• Abstract factory relies on object composition. object creation is implemented in methods exposed in the factory interface.
• All Factory Patterns promote, loose coupling by reducing the dependency of your application on  concrete classes.
• The intent of Factory Method is to allow a class to defer instantiation to subclasses.
• The intent of Abstract Factory is to create families of related objects without having to depend on concrete classes.
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