possible is possible but take care about what mean INHERITANCE in OOP.
Animal
/ \
Cat Dog
Cat is a Animal
Dog is a Animal
Cat is not a Dog and never will be a Dog
Dog is not a Cat and never will be a Cat
Cat and Dog are different Types of Animal
A PoorGuy can will be a RichGuy and a RichGuy can will be a PoorGuy: Poor
and Rich are not different Type of Guy instead it is a state.
The same is for Employee... in this case more than a state we can talk about
a role (may be).
2010/4/2 nadav s <[email protected]>
> lets say i have Employee which is a concrete class with the properties
> Id
> Type
>
> and i have CoolEmployee and MoronEmployee that extend Employee
>
> now i have many employee types and i want type=1 to generate CoolEmployee
> and type=2 to generate MoronEmployee.
> there are alot of other possible values, for instance, 3 is manager and 4
> is Cleaning guy, and i want all of these other values to generate the
> Employee class
>
> Do i need an extra column to discriminate between the classes or can i
> somehow say that Employee is the default class of a not-found value and use
> the type column?
>
> (i don't have a mapping because it is just a theoritical question :) )
>
> btw, another thing i was wondering about but couldn't google an answer is
> if it is currently possible to set range of values for discrimination
> (similar to the previous question)
> lets say that i have the sub classes RichGuy, PoorGuy both extend Guy
> and i wanna have the RichGuy subclass generated when the Income column is
> more than 1,000,000
> if the Income is between 10,000 to 1,000,000 its just a Guy
> and less than 10,000 is a PoorGuy
>
> could this be mapped?
> i see a big problem with this scenario because if the Income property is
> updatebly by the application, we could have a PoorGuy that his Income just
> became
> high enough that he should become just a Guy
> but if the Income property isn't updatebly it might make sense
>
> again, it is just a theoretical question.
>
> thanks.
>
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Fabio Maulo
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