Frogs design

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Latest revision as of 04:31, 15 July 2010

An OO model of frogs. This beautiful design appeared in the 2004 427 exam.

This design models the lifecycles of Frogs.
A Frog begins life as an Egg, grows into a Tadpole and then an AdultFrog.
A FrogBrain belongs to a Frog and manages its behaviour.
There is one Biologist, Igor, who sometimes moves Frogs around. Igor has been known to fry their legs in white wine.
Toads don’t have the same lifecycle as Frogs, but they look and act a lot like Frogs.
Toads eat AdultFrogs.

@@ Line 12: / Line 12: @@
 * ''Toad''s eat ''AdultFrogs''.
-== Broken heuristics ==
+== Criticisms ==
-* [[Riel's heuristics]]
+* [[2009 frog design criticisms]]
-** 3.9 [[Avoid verb classes]]: The ''Move'' interface is a verb. It could be called ''Movable'' or similar (although that name is still not great for other reasons).
-** 5.14 [[Avoid becomes]]: A frog will at various stages be an egg, tadpole and adult frog.
+* [[2010 frog design criticisms]]
-** 5.17 [[Avoid no-op overrides]]: The ''hop'' and ''swim'' methods of ''Egg'' do nothing.