Factory

Motivation

• Object creation logic become convoluted
• Constructor is not descriptive
  • Name is restricted by name of the container
  • Cannot overload name sets of arguments with different names
  • Can turn into “optional parameter hell”
• Object creation can be outsourced to
  • A separate function
  • That may exist in a separate class
  • Can create hierarchy of factories with Abstract Factory

Factory Method

• A static method to create objects

Factory

• A factory can take care of object creation entirely
  • This is a kind of Single Responsible Principle

Inner Factory

• An instance of Factory Class inside the modeling Class
• An nested class

Abstract Factory

• Hierarchy of Factory to create related objects

Functional Factory