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This new refactoring called inline class is the reverse of the extract class
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refactoring. And know that this is kind of a general situation in the
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sense that it is often the case that the refactoring also has a
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reverse refactoring that does exactly the
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opposite. So basically, un-dos, in a sense,
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the operation of the other refactoring. In this case, the motivation for the
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refactoring is that during system evolution, we might end up with one or
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more classes that do not do much. In this case what you want
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to do is to take the class that is not doing that much and
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move its features into another class. And then delete the original class.
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So lets use an example similar to the one we've used for
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the previous refactoring to illustrate how this works. Here we have in
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this case, two classes, person and office. And the person class is
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using the office class, but this latter class, the office class, only
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contains a phone number. So it doesn't really do that much. What
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we can do is therefore to fold the office class into the
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person class, by simply moving its only field into the class. And so
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the result will be this person class that also contains the information
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about the office number, and overall a simpler design for the code.
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