What is the Factory pattern used for?

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 are the advantages of factory design pattern?

Factory Design Pattern Advantages Factory design pattern provides approach to code for interface rather than implementation. Factory pattern removes the instantiation of actual implementation classes from client code. Factory pattern makes our code more robust, less coupled and easy to extend.

What is a factory in Java?

Factory, as the name suggests, is a place to create some different products which are somehow similar in features yet divided into categories. In Java, factory pattern is used to create instances of different classes of the same type.

What is an object factory in Java?

In object-oriented programming (OOP), a factory is an object for creating other objects – formally a factory is a function or method that returns objects of a varying prototype or class from some method call, which is assumed to be “new”.

Why do we need abstract factory pattern?

The purpose of the Abstract Factory is to provide an interface for creating families of related objects, without specifying concrete classes. This pattern is found in the sheet metal stamping equipment used in the manufacture of Japanese automobiles.

What is factory design pattern in spring?

Factory Method Pattern. The factory method pattern entails a factory class with an abstract method for creating the desired object. To accomplish this, we can create a factory implementation for each desired object and return the desired object from the concrete factory method.

What is the benefit of having a factory to make objects?

Factories can be used when: The creation of an object makes reuse impossible without significant duplication of code. The creation of an object requires access to information or resources that should not be contained within the composing class.

Is Abstract Factory useful?

You need abstract factory when different polymorphic classes has different instantiation procedure. And you want some module to create instances and use them, without knowing any details of object initialization. For example – you want to create Java objects doing some calculations.

What is difference between Abstract Factory and factory design pattern?

1) One more difference between Abstract Factory and Factory design pattern is that AbstractFactory pattern uses composition to delegate responsibility of creating object to another class while Factory design pattern uses inheritance and relies on derived class or sub class to create object.

What is factory in Java Spring?

In the factory method pattern, you provide an interface, which can be a Java interface or an abstract class to create objects. A factory method in the interface defers the object creation to one or more concrete subclasses at run time.

Where is factory pattern used in spring?

The Spring framework uses the factory design pattern for the creation of the objects by using two approaches: Spring BeanFactory Container (e.g org. springframework. beans.

What are the pros and cons of factory design pattern?

The pros and cons of the factory method design pattern

Advantages	Disadvantages
Modular expandability of the application	High number of required classes
Good testability	Extension of the application is very elaborate
Significant method names