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What are the factory method patterns explain with examples?

Example. The Factory Method defines an interface for creating objects, but lets subclasses decide which classes to instantiate. Injection molding presses demonstrate this pattern. Manufacturers of plastic toys process plastic molding powder, and inject the plastic into molds of the desired shapes.

What is factory method in design patterns?

Factory Method is a creational design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.

Which are the three types of factory method?

There are 3 types of factory design pattern.

  • Simple factory.
  • Factory method.
  • Abstract factory.

How factory method is different from Factory Method design pattern?

Factory: Client just need a class and does not care about which concrete implementation it is getting. Factory Method: Client doesn’t know what concrete classes it will be required to create at runtime, but just wants to get a class that will do the job.

Where is factory design pattern used?

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

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

What type of pattern is factory pattern?

In class-based programming, the factory method pattern is a creational pattern that uses factory methods to deal with the problem of creating objects without having to specify the exact class of the object that will be created.

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.

How do factory patterns work?

In Factory pattern, we create objects without exposing the creation logic to the client and the client uses the same common interface to create a new type of object. The idea is to use a static member-function (static factory method) that creates & returns instances, hiding the details of class modules from the user.

Why do we use factory method?

The stated purpose of the Factory Patterns is: Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.

What is factory design pattern in laravel?

1 Answer. 1. Well, actually the Factory Pattern is a creational pattern which uses factory methods to deal with the problem of creating objects even without specifying a staic class, which means it create objects dynamically at the run-time .

What is factory method?

Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes.

Why do we need factory design pattern?

Factory design pattern is used to create objects or Class in Java and it provides loose coupling and high cohesion. Factory pattern encapsulate object creation logic which makes it easy to change it later when you change how object gets created or you can even introduce new object with just change in one class.

Why to use factory pattern?

+The main reason for which the factory pattern is used is that it introduces a separation between the application and a family of classes (it introduces weak coupling instead

  • +It provides customization hooks.
  • – The factory has to be used for a family of objects.
  • When to use factory pattern?

    Factory method pattern can be used when there is a need to generate objects that belong to specific family. Along side this requirement, you also want to keep the decisions made regarding object instantiation in one place.