Prefactoring (Paperback)

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Prefactoring (Paperback)

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內容描述

Description:

More often than not, developers will stop a large project in the middle of
the build stage to rethink and recode the software design so it's cleaner and
more efficient. Known as "refactoring," this process eats up valuable time and
money. To help offset refactoring, this book presents a new process called
"prefactoring," the premise of which states that you're better off considering
the best possible design patterns before you even begin your project.
Prefactoring, in essence, is the art of applying the insights gleaned
from previous experience (whether yours or someone else's) when developing
software to new projects. Doing so will likely save you from making costly
design changes midstream--and maybe even save your job!
This practical, thought-provoking guide details prefactoring guidelines
in design, code, and testing, each derived from the lessons of many developers
over many years. With these guidelines, you're far more likely to create more
readable and maintainable code before you reach the second-guessing stage.

To help communicate the many facets of this process,
Prefactoring follows the example of a fictitious client, Sam, as he
seeks to create a software system from beginning to implementation. Among the
topics covered:

General development issues
Implementation classes
Object-oriented design
Creating reports via separation of concerns
Associations and states
Creating and testing interfaces
If you understand object-oriented design, and you want to save time and
money by considering more efficient designs before you begin your
project, Prefactoring will show you the way. It won't guarantee that
you'll never need to refactor your design or code again, but you're sure to
cut down on the amount of refactoring you do.
 
 
Table of
Contents:

Preface

1. Introduction to Prefactoring
        What Is Prefactoring?    
    The Three Extremes      The Guidelines Explored
        The Context for This Book
2. The System in So Many Words
        Meet Sam    
    Reinvention Avoidance      What's in a Name?
        Splitters Versus Lumpers    
    Clumping      Abstracting    
    Prototypes Are Worth a Thousand Words
3. General Development Issues
        Start with the Big Picture  
      Interface Contracts      Validation
        Code Communicates    
    Consistency Is Simplicity      A Prefactoring
   Attitude      Don't Repeat Yourself  
      Documentation of Assumptions and Decisions    
    Dealing with Deviations and Errors      Speeding
        The Spreadsheet Conundrum    
    Tools Are Tools-Use Them Wisely
4. Getting the Big Picture
        The Rest of the Story      Process
        The Initial Design    
    Global Planning, Local Designing      Testing
   Functionality      Testing Quality  
      Security

5. Got Class?    
    Categories and Classes      Declaration Versus
   Execution      Appropriate Inheritance  
      Communicate with Text      More Than One

6. A Few Words on Classes
        Honor the Class Maxims      Three
   Laws of Objects      Need Determines Class
        Polymorphism      One Little Job
        Policy Versus Implementation  
      Extreme Naming      Overloading Functions

7. Getting There  
      Where We Are      Separating Concerns
        Migrating to the New System

8. The First Release  
      The Proof Is in the Pudding    
    Retrospective Time      The System as It Stands
   Now      Operations Interface    
    Abstract Data Types      Configuration
        Testing      Dealing with
   Deviations and Errors      A Little Prefactoring
        The First Released Iteration  
      Sometimes Practice Does Not Match Theory    
    The Rest of the Classes

9. Associations and States
        Sam's New Requirement      Who's
   in Charge?      The State of an Object

10. Interfaces and Adaptation
         The Catalog Search Use Case  
       Designing the Interface      Interface
    Development      Interface Testing  
       Interface Splitting      Something
    Working

11. Zip Codes and Interfaces
         Adaptation      Pass
    the Buck      Unwritten Code    
     Indirection      Logging    
     Paradigm Mismatch
12. More Reports  
       Fancy Reports      Change Happens
         Exports
13. Invoices, Credit Cards, and
    Discounts      The Next Step  
       The Language of the Client      Security
    and Privacy
14. Sam Is Expanding  
       The Second Store      A New Development
         The Third Store    
     Goodbye Sam      Generality
15. A Printserver Example
         Introduction      The System
         The Message      Testing
         Logging      Still More
    Separation      Epilogue

16. Antispam Example  
       The Context      Spam Checking
         The ReceivingMailServer    
     ReceivedMailExaminer      The Full Flow

17. Epilogue
    a. Guidelines and Principles

b. Source Code
index