This article was done using my notes from:
Alexander Shvets (2019), Dive into Design Patterns, Refactoring.Guru
Factory Method
Factory Method is a creational deisgn pattern that provides an interface for created objects in a superclass, but allows subclasses to alter the type of objects that will be created.
Structure
Code
from __future__ import annotations
from abc import ABC, abstractmethod
class Creator(ABC):
@abstractmethod
def factory_method(self):
pass
def some_operation(self) -> str:
product = self.factory_method()
return product.operation()
class ConcreteCreator1(Creator):
def factory_method(self) -> Product:
return ConcreteProduct1()
class ConcreteCreator2(Creator):
def factory_method(self) -> Product:
return ConcreteProduct2()
class Product(ABC):
@abstractmethod
def operation(self) -> str:
pass
class ConcreteProduct1(Product):
def operation(self) -> str:
return "{Result of the ConcreteProduct1}"
class ConcreteProduct2(Product):
def operation(self) -> str:
return "{Result of the ConcreteProduct2}"