1. Refactoring, a First Example.
The Starting Point. The First Step in Refactoring. Decomposing and
Redistributing the Statement Method. Replacing the Conditional
Logic on Price Code with Polymorphism. Final Thoughts.
2. Principles in Refactoring.
Defining Refactoring. Why Should You Refactor? When Should You
Refactor? What Do I Tell My Manager? Problems with Refactoring.
Refactoring and Design. Refactoring and Performance. Where Did
Refactoring Come From?
3. Bad Smells in Code.
Duplicated Code. Long Method. Large Class. Long Parameter List.
Divergent Change. Shotgun Surgery. Feature Envy. Data Clumps.
Primitive Obsession. Switch Statements. Parallel Inheritance
Hierarchies. Lazy Class. Speculative Generality. Temporary Field.
Message Chains. Middle Man. Inappropriate Intimacy. Alternative
Classes with Different Interfaces. Incomplete Library Class. Data
Class. Refused Bequest. Comments.
4. Building Tests.
The Value of Self-testing Code. The JUnit Testing Framework. Adding
More Tests.
5. Toward a Catalog of Refactorings.
Format of the Refactorings. Finding References. How Mature Are
These Refactorings?
6. Composing Methods.
Extract Method. Inline Method. Inline Temp. Replace Temp with
Query. Introduce Explaining Variable. Split Temporary Variable.
Remove Assignments to Parameters. Replace Method with Method
Object. Substitute Algorithm.
7. Moving Features Between Objects.
Move Method. Move Field. Extract Class. Inline Class. Hide
Delegate. Remove Middle Man. Introduce Foreign Method. Introduce
Local Extension.
8. Organizing Data.
Self Encapsulate Field. Replace Data Value with Object. Change
Value to Reference. Change Reference to Value. Replace Array with
Object. Duplicate Observed Data. Change Unidirectional Association
to Bidirectional. Change Bidirectional Association to
Unidirectional. Replace Magic Number with Symbolic Constant.
Encapsulate Field. Encapsulate Collection. Replace Record with Data
Class. Replace Type Code with Class. Replace Type Code with
Subclasses. Replace Type Code with State/Strategy. Replace Subclass
with Fields.
9. Simplifying Conditional Expressions.
Decompose Conditional. Consolidate Conditional Expression.
Consolidate Duplicate Conditional Fragments. Remove Control Flag.
Replace Nested Conditional with Guard Clauses. Replace Conditional
with Polymorphism. Introduce Null Object. Introduce Assertion.
10. Making Method Calls Simpler.
Rename Method. Add Parameter. Remove Parameter. Separate Query from
Modifier. Parameterize Method. Replace Parameter with Explicit
Methods. Preserve Whole Object. Replace Parameter with Method.
Introduce Parameter Object. Remove Setting Method. Hide Method.
Replace Constructor with Factory Method. Encapsulate Downcast.
Replace Error Code with Exception. Replace Exception with Test.
11. Dealing with Generalization.
Pull Up Field. Pull Up Method. Pull Up Constructor Body. Push Down
Method. Push Down Field. Extract Subclass. Extract Superclass.
Extract Interface. Collapse Hierarchy. Form Template Method.
Replace Inheritance with Delegation. Replace Delegation with
Inheritance.
12. Big Refactorings.
Tease Apart Inheritance. Convert Procedural Design to Objects.
Separate Domain from Presentation. Extract Hierarchy.
13. Refactoring, Reuse, and Reality.
A Reality Check. Why Are Developers Reluctant to Refactor Their
Programs? A Reality Check (Revisited). Resources and References for
Refactoring. Implications Regarding Software Reuse and Technology
Transfer. A Final Note. References.
14. Refactoring Tools.
Refactoring with a Tool. Technical Criteria for a Refactoring Tool.
Practical Criteria for a Refactoring Tool. Wrap Up.
15. Putting It All Together.
References.
List of Soundbites.
List of Refactorings.
Index. 0201485672T04062001
Martin Fowler is the Chief Scientist of ThoughtWorks, an
enterprise-application development and delivery company. He's been
applying object-oriented techniques to enterprise software
development for over a decade. He is notorious for his work on
patterns, the UML, refactoring, and agile methods. Martin lives in
Melrose, Massachusetts, with his wife, Cindy, and a very strange
cat. His homepage is http://martinfowler.com.
Kent Beck consistently challenges software engineering dogma,
promoting ideas like patterns, test-driven development, and Extreme
Programming. Currently affiliated with Three Rivers Institute and
Agitar Software, he is the author of many Addison-Wesley
titles.
John Brant and Don Roberts are the authors of the Refactoring
Browser for Smalltalk, which is found at
http://st-www.cs.uiuc.edu/~brant/RefactoringBrowser/. They are also
consultants who have studied both the practical and theoretical
aspects of refactoring for six years.
William Opdyke's doctoral research on refactoring object-oriented
frameworks at the University of Illinois led to the first major
publication on this topic. He is currently a Distinguished Member
of Technical Staff at Lucent Technologies/Bell Laboratories.
John Brant and Don Roberts are the authors of the Refactoring
Browser for Smalltalk, which is found at
http://st-www.cs.uiuc.edu/~brant/RefactoringBrowser/. They are also
consultants who have studied both the practical and theoretical
aspects of refactoring for six years.
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