Contents
What is a simple factory?
In most cases, a simple factory is an intermediate step of introducing Factory Method or Abstract Factory patterns. A simple factory is usually represented by a single method in a single class. Over time, this method might become too big, so you may decide to extract parts of the method to subclasses.
What is simple factory in Java?
The simple factory is essentially a class that, based on a given input, returns objects of different types. In contrast to the factory method or the abstract factory, the simple factory is made up of just one concrete factory. This concrete factory doesn’t inherit from another abstraction layer.
What is the main purpose of factory method?
A factory method is just an addition to Factory class. It creates the object of the class through interfaces but on the other hand, it also lets the subclass decide which class is instantiated.
When should I use the factory pattern?
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 is factory method?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes.
What is abstract factory method?
An Abstract Factory is a class with several Factory methods. So basically, an Abstract Factory class has a collection of different Factory Methods to create different desired Concrete objects. Each concrete factory sub-class implements the Factory methods for a particular family of products.
What is a factory object?
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”.
What is factory design pattern in Java?
Factory design pattern in Java one of the core design pattern which is used heavily not only in JDK but also in various Open Source framework such as Spring, Struts and Apache along with decorator design pattern in Java. Factory Design pattern is based on Encapsulation object oriented concept.