when to use abstract factory pattern

Abstract factory pattern is yet another creational design pattern and is considered as another layer of abstraction over factory pattern.In this tutorial, we will expand the scope of car factory problem discussed in factory pattern.We will learn when to use factory pattern by expanding scope of car factory and then how abstract factory pattern solves the expanded scope. Needs to isolate concrete classes from their super classes. Usage examples: The Abstract Factory pattern is pretty common in Python code. The abstract factory pattern helps to boost consistency amongst the products in a collection. Assume your application supports different data … Background Before talking about Abstract Factory pattern, I just want to share a little about "Gang of Four (GoF)" to which the Abstract Factory pattern belongs. The real power of the abstract factory comes from it’s abstract nature. The abstract factory pattern is a creational pattern which provides a way to encapsulate a group of individual factories that have a common purpose or theme; without specifying their concrete classes. A class delegates object creation to a factory object instead of creating objects directly. Abstract Factory Pattern . Object creation has been abstracted and there is no need for hard-coded class names in the client code. Factory Method: Defines an interface for creating an object, but let’s the classes that implement the interface decide which class to instantiate.The Factory method lets a class defer instantiation to subclasses. Structural code in C#. Abstract Factory Pattern says that just define an interface or abstract class for creating families of related (or dependent) objects but without specifying their concrete sub-classes.That means Abstract Factory lets a class returns a factory of classes. This structural code demonstrates the Abstract Factory pattern creating parallel hierarchies of objects. The abstract factory pattern can be useful even if only returning one object. An abstract factory is similar to the factory method, but instead of a method it is an object in its own right. A real life example for the use of the Abstract Factory pattern is providing data access to two different data sources. The Abstract Factory design pattern describes how to solve such problems: Encapsulate object creation in a separate (factory) object. Then, the factory is used for creating specific sub-components. Provides a class library of products without exposing implementation by using Interface. Abstract Factory pattern also falls under Creational Pattern of Gang of Four (GoF) Design Patterns. That is, define an interface (AbstractFactory) for creating objects, and implement the interface. Simple Factory: Strictly speaking, it’s not a design pattern, but a technique we use very often.It encapsulates the object instantiation process. So, this is the reason that Abstract Factory Pattern is one level higher than the Factory Pattern. The factory method is a method which takes the creation of objects and moves it out of the main body of the code. Identification: The pattern is easy to recognize by methods, which return a factory object. UML Diagram This blog focuses on the differences between the factory method and abstract factory patterns. But if you hard code the factory by sticking a new in front of it you’re just as statically bound as a static factory method. When to use & advantages of Abstract Factory Pattern. Creates families of related or dependent objects like a Unit. This is the first blog in a series about design patterns. Many frameworks and libraries use it to provide a way to extend and customize their standard components.

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