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Abstract Factory

Post Series: Creational Design Pattern

Abstract factory pattern in useful when the client needs to create objects which are somehow related. If we need to create the family of related or dependent objects, then we can use Abstract Factory Pattern.

Useful

The client needs to create objects which are somehow related.

Diagram

  • AbstractFactory:     declares an interface for operations that create abstract products
  • ConcreteFactory: implements the operations to create concrete product objects
  • AbstractProduct:     declares an interface for a type of product object
  • ConcreteProduct: defines a product object to be created by the corresponding concrete factory implements the AbstractProduct interface
  • Client: uses interfaces declared by AbstractFactory and AbstractProduct classes

which interface, which class

Implement

We need three concrete factories (one for each manufacturer) and two sets of related products (one for smart and one for dumb).

  1. Type of phone (concrete factories)
    • Nokia
    • Samsung
    • HTC
  2. Phone manufacturer (related product)
    • Smart Phones
    • Dumb Phones

 

Creating the Abstract Products

Creating Concrete Product

For Dumb Phone

For Smart Phone

Creating the Abstract Factory

Creating the Concrete Factories

Creating the Client

 

Usage

 

  • Create a set of related objects, or dependent objects which must be used together.
  • System should be configured to work with multiple families of products.
  • The creation of objects should be independent from the utilizing system.
  • Concrete classes should be decoupled from clients.

 

Resource

https://www.codeproject.com/Articles/328373/Understanding-and-Implementing-Abstract-Factory-Pa
http://www.dotnettricks.com/learn/designpatterns/abstract-factory-design-pattern-dotnet

 

 

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