Design Patterns Explained: A New Perspective on Object-Oriented Design

Field Notes

In practice, almost any kind of pattern that involves polymorphism could be present in the Analysis Matrix. Of the patterns I've presented, this would include Bridge, Decorator, Template, and Observer. Other patterns I have used in an Analysis Matrix are Composite, Proxy, Chain of Responsibility, Command, Iterator, Mediator, and Visitor.

For example, if in our e-tail system I included requirements on printing sales tickets and found the following variations:

• U.S. sales tickets need headers

• Canadian sales tickets need headers and footers

• German sales tickets need two different footers

I would include this information in its own row, each entry relating to the format of sales tickets. I would implement this row's requirements with a Decorator ...