Refactoring for Software Design Smells

Chapter 2

Design Smells

Abstract

Design smells are certain structures in the design that indicate violation of fundamental design principles and negatively impact design quality. This chapter provides a brief overview of design smells and various factors that lead to the occurrence of smells. This chapter presents the core idea behind a principle-based classification scheme for design smells discussed in this book: “When we view every smell as a violation of one or more underlying design principle(s), we get a deeper understanding of that smell; but perhaps more importantly, it also naturally directs us toward a potential refactoring approach for that smell.” Building on this insight, this chapter introduces the PHAME (Principles of Hierarchy, Abstraction, ...