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= Chapter 12 Big Refactorings = | = Chapter 12 Big Refactorings = | ||
== Tease Apart Inheritance == | == Tease Apart Inheritance == | ||
* You have an inheritance hierarchy that is doing two jobs at once.''Create two hierarchies and use delegation to invoke one from the other.'' | * You have an inheritance hierarchy that is doing two jobs at once.<br />''Create two hierarchies and use delegation to invoke one from the other.'' | ||
http://zeropage.org/~reset/zb/data/TeaseApartInheritance.gif | http://zeropage.org/~reset/zb/data/TeaseApartInheritance.gif | ||
== Convert Procedural Design to Objects == | == Convert Procedural Design to Objects == | ||
* You have code written in a procedural style.''Turn the date records into objects, break up the behavior, and move the behavior to the objects.'' | * You have code written in a procedural style.<br />''Turn the date records into objects, break up the behavior, and move the behavior to the objects.'' | ||
http://zeropage.org/~reset/zb/data/ConvertProceduralDesignToObjects.gif | http://zeropage.org/~reset/zb/data/ConvertProceduralDesignToObjects.gif | ||
== Separate Domain from Presentation == | == Separate Domain from Presentation == | ||
* You have GUI classes that contain domain logic.''Separate the domain logic into separate domain classes.'' | * You have GUI classes that contain domain logic.<br />''Separate the domain logic into separate domain classes.'' | ||
http://zeropage.org/~reset/zb/data/SeparateDomainFromPresentation.gif | http://zeropage.org/~reset/zb/data/SeparateDomainFromPresentation.gif | ||
== Extract Hierarchy == | == Extract Hierarchy == | ||
* You have a class that is doing too much work, at least in part through many conditional statements.''Create a hierarchy of classes in which each subclass represents a special case.'' | * You have a class that is doing too much work, at least in part through many conditional statements.<br />''Create a hierarchy of classes in which each subclass represents a special case.'' | ||
http://zeropage.org/~reset/zb/data/ExtractHierarchy.gif | http://zeropage.org/~reset/zb/data/ExtractHierarchy.gif | ||
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[[Refactoring]] | [[Refactoring]] | ||
Revision as of 14:01, 26 March 2026
Chapter 12 Big Refactorings
Tease Apart Inheritance
- You have an inheritance hierarchy that is doing two jobs at once.
Create two hierarchies and use delegation to invoke one from the other.
http://zeropage.org/~reset/zb/data/TeaseApartInheritance.gif
Convert Procedural Design to Objects
- You have code written in a procedural style.
Turn the date records into objects, break up the behavior, and move the behavior to the objects.
http://zeropage.org/~reset/zb/data/ConvertProceduralDesignToObjects.gif
Separate Domain from Presentation
- You have GUI classes that contain domain logic.
Separate the domain logic into separate domain classes.
http://zeropage.org/~reset/zb/data/SeparateDomainFromPresentation.gif
Extract Hierarchy
- You have a class that is doing too much work, at least in part through many conditional statements.
Create a hierarchy of classes in which each subclass represents a special case.
http://zeropage.org/~reset/zb/data/ExtractHierarchy.gif
