Hi,
��� I have an abstract class, Users, that is extended by several classes
such as Administrator, Tester etc. My service method, LogIn, will return a
User object upon successful login. I verify that a Users object is send
back to the client. However, the client will throw an exception which
indicate that a Java Bean can not be created because there is no default
constructot for Users class.

��� This design is to hide the detail from the client program so that there
is no testing logic for identifying the type of the user who logs in. Any
suggestion�to resolve this issue is highly appreciated.


Harry Wen


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