Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition

Introduction

Previously, we explored the application of the first five GRASP patterns:

• Information Expert, Creator, High Cohesion, Low Coupling, and Controller

The final four GRASP patterns are:

• Polymorphism

• Indirection

• Pure Fabrication

• Protected Variations

Once these have been explained, we will have a rich and shared vocabulary with which to discuss designs. And as some of the “gang-of-four” (GoF) design patterns (such as Strategy and Factory) are also introduced (in subsequent chapters), that vocabulary will grow. A short sentence such as, “I suggest a Strategy generated from a Factory to support Protected Variations and low coupling with respect to <X>” communicates lots of information about the design, since pattern names tersely convey a complex ...