Problem Inheritance and casting

From: Justin Deutsch (justin.deutsc..elevance.com.au)
Date: Wed Dec 22 2004 - 00:27:13 EST

  • Next message: Andrus Adamchik: "Re: Problem Inheritance and casting"

    Hi All,

    I'm having a problem with inheritance. I have the following tables,
    where I am using Type as object type:

       Role Role_Type
       ---- ---------
       ID ID
       Name Name
       Description Description
       Type -> Role_Type
       Rate

    and the following classes:

       Class Qualifier
       ----- ---------
       Role
       SystemRole type.name = "system"
       TimeSheetRole type.name = "timesheet"

    Everything seems to be working well, except when I try to retrieve a
    Role and test whether or not the role is an instance of TimeSheetRole,
    something like:

    r = Role.getRole(ctxt, VALID_TIMESHEET_ROLE_NAME);
    if(r instaceof TimeSheetRole){
       System.out.println("True");
    } else {
       System.out.println("False");
    }

    This statement would return False, not True as I'm expecting. Now I
    know that the VALID_TIMESHEET_ROLE_NAME is actually a TimeSheetRole,
    because my other test use the same value.

    Dose any one have any ideas what my problem is?

    Thanks in advance. 

    -- 
Justin Deutsch

                     Relevance... because results count

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