Template Method (Template with hooks) [Behavioral]

Description

Defines the skeleton of an algorithm in a method, deferring some steps to subclasses. The template method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure.

This pattern is all about creating a template for an algorithm.

Hooked on Template Method

A hook is a method that is declared in the abstract class, but only given an empty or default implementation. This gives subclasses the ability to "hook into" the algorithm at various points if they wish; a subclass is also free to ignore the hook.