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Message:

Employee is-a Person

Posted by Helge Bredow on 21 Oct 1998, 1:52 AM

I was intrigued by your statement that you may not necessarily model Employee as a subclass of Person, which is something I have always thought to be the case. How would you then pass an Employee to a method that expects a Person?

I suspect that Employee would have a contructor that takes a Person as an argument and would also have a method getPerson() which returns a reference to that person object. This solution seems a but ugly to me since you would really like to pass that Employee around the system as if it were a Person.

• Employee is-a Person Dave Andrews 28 Oct 1998, 1:57 PM (0)
• On Long Term is-a Relationships Bill Venners 25 Oct 1998, 7:01 PM (1)
  • Is the model right or wrong? Mike Mannion 10 Nov 1998, 7:56 AM (0)