Chapter 2. Inverses

When we refactor, we're trying to respond to the forces affecting code. Sometimes what was a good change today no longer looks so good tomorrow, and we find ourselves reversing a refactoring.

Interlude I2.1

Table I-3 presents a list of refactorings. Next to each refactoring, write the name of the refactoring that undoes its effects. (The refactoring and its inverse will both be on the list.)

▪ See Appendix C for solution.

Table I.3. Refactorings and Their Inverses

REFACTORING

INVERSE

Add Parameter

 

Change Bidirectional Association to Unidirectional

 

Change Reference to Value

 

Change Unidirectional Association to Bidirectional

 

Change Value to Reference

 

Collapse Hierarchy

 

Extract Class

 

Extract Method

 

Extract Subclass

 

Hide Delegate

 

Inline ...

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