factory

Factory

This example demostrates two related design patterns:

• Factory Method creates an object without exposing the creation code to client, and the client uses the same common interface to create new type of object.

• Abstract Factory produce families of related objects without specifying the concreate classes.

Code

World creates different types of Vehicle without knowing the details of how they are created. Instead, VehicleFactory takes care of the creation details. This helps us decouple the creation code from the user.

Note that Car and Bike are created differently in the code as Bike needs additional parameters. With factory method, we hide these details inside the factory. As a result, the caller, World, doesn't have to know about it.

Reference

• https://refactoring.guru/design-patterns/factory-method/cpp/example
• https://www.geeksforgeeks.org/design-patterns-set-2-factory-method/
• https://stackoverflow.com/questions/5739611/what-are-the-differences-between-abstract-factory-and-factory-design-patterns