Template Method Pattern (Template Method)

 GOF Intent: Define the skeleton of an algorithm in an operation, while deferring some steps to subclasses. (Solution to fix step behavior)

 

Role:

1 Abstract Class: Implements the template method and defines the skeleton of the algorithm.

 

2 Concrete Class (ConcreteClass): implements the abstract methods in the abstract class, and has completed the complete algorithm.

 

Implementation points: Fixed steps are defined as abstract methods in the parent class.