Refactoring
Benefits and Disadvantages of an Amazing Technique

Michael Hunger

 
• Contents
• List of Figures
• Introduction to Refactoring
  • Introduction
  • What is Refactoring?
    • Testing using Unit Tests
    • Refactoring Consists of Small Steps
  • The Benefits of Refactoring
    • Refactoring helps Understanding Code
    • Refactoring as a Tool to Improve the (Non)Existing Design
      • Project Management aspects of refactoring (When doing it)
      • The Rule of Three by DON ROBERTS
    • Code Reviews
    • Introducing Refactoring to the Management
  • Insufficiencies of Refactoring
    • When it Does Not Pay Off to Refactor
    • The Costs of Refactoring
    • Risks Involved When Doing Refactoring
  • Refactoring vs. Design
    • Iterative, Incremental Development
    • Extreme Programming
      • A Metaphor for XP
    • Refactoring Is Analyzing
    • Refactoring Adds Flexibility
  • When its Necessary to Refactor
  • The Craft of Refactoring, or what helps doing it
    • Patterns
    • Extreme Programming, XP
    • The Hard Work
    • Language Advantages
    • Refactoring vs. Rewriting
• The Development Of Refactoring
  • Looking at the History
    • Catalogs of Refactorings
  • Tools Needed
    • Thinking About Tools
    • History of Tool Development
  • A Short Look on Some Tools Available
    • Refactoring Browser (Smalltalk)
    • JRefactory (Java)
    • IntelliJ Renamer (Java)
    • Xref-Speller for Emacs (Java,C++,C)
• Refactoring an Example
  • Refactoring Examples in General
  • Reasons For Choosing This Example
  • Anticipated Problems
  • Doing the Refactoring
    • Testing
    • Log-file and Caring about Initialization
    • Idea of DatabaseFormat
    • More Testing
    • Refactoring Outside The Database Server
    • First Methods Extracted To DatabaseFormat
    • Switching off a Switch (Statement)
    • A Bright Moment
    • Reaching The Limits
    • Final Moves
  • What were the Benefits and Disadvantages of Refactoring the Class
    • Benefits
    • Disadvantages
• Summary and a Look Ahead
  • Summary
  • Future Development
• Refactoring Example
  • Refactoring Log
  • Refactoring Switch Statement
  • Replace Parameter with Query
  • The Two Subclasses of DatabaseFormat
  • Comparison of the Code before and after the refactoring
• References
• About this document ...