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Need good design: Anemic Model, Inheritance and Pattern Matching
I have Handler classes which accepts Queries and returns Results. Handlers is anemic. They accept input data bag and returns output data bag. Handlers can be many so I created common generic interface ...
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Designing generic type inheritance hierarchy
I have now put another rephrased version of original question as requested by the user in the comments with class names mimicking real world scenario of postal office (though I dont know how real ...