What is the difference between simple factory and factory method?

Use the Factory method when you want to make a Framework where you want to take a control from the creation of the Object to the management of that Object. That’s unlike the Simple factory, where you only care about the creation of a product, not how to create and manage it.

What is a simple factory pattern?

The Simple factory pattern. describes a class that has one creation method with a large conditional that based on method parameters chooses which product class to instantiate and then return. People usually confuse simple factories with a general factories or with one of the creational design patterns.

What is the difference between factory and abstract factory patterns?

The main difference between a “factory method” and an “abstract factory” is that the factory method is a single method, and an abstract factory is an object. The Factory Method pattern uses inheritance and relies on a subclass to handle the desired object instantiation.

What is a key difference between the singleton and factory pattern?

6 Answers. A singleton pattern ensures that you always get back the same instance of whatever type you are retrieving, whereas the factory pattern generally gives you a different instance of each type. The purpose of the singleton is where you want all calls to go through the same instance.

When should I use the factory pattern?

The Factory Method pattern is generally used in the following situations:

1. A class cannot anticipate the type of objects it needs to create beforehand.
2. A class requires its subclasses to specify the objects it creates.
3. You want to localize the logic to instantiate a complex object.

What are the benefits of the simple factory pattern?

Advantage of Factory Design Pattern

• Factory Method Pattern allows the sub-classes to choose the type of objects to create.
• It promotes the loose-coupling by eliminating the need to bind application-specific classes into the code.

Is factory an Antipattern?

The Factory Pattern is an Anti-Pattern Anti-patterns are things that seem great and useful and should be used.

What is the factory pattern used for?

The Factory Method pattern is a design pattern used to define a runtime interface for creating an object. It’s called a factory because it creates various types of objects without necessarily knowing what kind of object it creates or how to create it.

What is factory and abstraction factory pattern demonstrate with example?

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.

What is Singleton and Factory?

Singleton – Ensures that at most only one instance of an object exists throughout application. Factory Method – Creates objects of several related classes without specifying the exact object to be created. Abstract Factory – Creates families of related dependent objects.

What is a singleton factory pattern with example?

Singleton Design Pattern | Implementation. The singleton pattern is one of the simplest design patterns. Sometimes we need to have only one instance of our class for example a single DB connection shared by multiple objects as creating a separate DB connection for every object may be costly.