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In Dr. Jones, I
represent a refactoring by four pieces of knowledge.
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First, what are
the obvious reasons not to perform the refactoring (the guards).
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Second, how does
the refactoring change Dr. Jones’ representation of the program design and
thus what is shown in its diagrams.
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Third, does the
refactoring suggest other refactorings that are likely to improve the program
design.
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And finally,
where are the places in the source that might have to be changed to implement
the refactoring.
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I’ll now examine
these four pieces of knowledge in detail for the move method refactoring.
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