Dart factory pattern

Save. Factory Method is referred as a creational design pattern which provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created . Also known as virtual constructors.2 Haz 2021

Specifically, using factories provides encapsulation, and means the code is not tied to specific classes or objects , and thus the class hierarchy or prototypes can be changed or refactored without needing to change code that uses them – they abstract from the class hierarchy or prototypes.

A factory, manufacturing plant or a production plant is an industrial site, often a complex consisting of several buildings filled with machinery, where workers manufacture items or operate machines which process each item into another .

A factory function is a function that returns an instance of a class. Dart provides factory keyword to label a default or named constructor . Then it becomes our responsibility to return an instance from this constructor. A factor constructor is generally used to control the instance creation.7 Eki 2019