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.. (לתיקייה המכילה) | |
(a) Could format be changed during a Counter object's lifetime?
(b) Do all Counter object share the same formatting?
| These questions are for you to answer |
Could Counter class be changed in any way other than adding new abstract methods?
| You can also change the specification of existing methods. If this is the case, you will also have to submit the specification of all modified methods as well |
Based on my analysis I arrived at the conclusion that (for example) redo should NOT be a method of Counter, but instead a static method in some other class. Is this OK?
| Yes. You should plan the specifcation of an undo/redo service. This service can be realized as either a method, a static method, or some other thing, whatever you feel is better |
(a) Can we assume that the tree of Counters is not changed during all undo/redo
operations? (b) If no, what is the semantics of undo/redo in such situations?
| (a) No, you cannot assume that (b) In this homework you should define the semantics |