Complex mapping problem

[ma...@redcentre.com]

Hi all,

I'm just looking for some advice regarding mapping a 
reasonably complex class with OJB.

The basis of the problem is the structure of a 
"User" transfer class. The class includes name, 
password and so on.  However, it also includes two 
Collections; a vector of "permissions" and a vector 
of "permission holders".  The permissions class is a 
simple one and can be handled with a many to many 
relationship.  The permission holder is more complex 
and defined by an interface. It may be implemented 
as a Role, Group or User.  Hence a User (or Role or 
Group) is a permission holder and can also hold 
other permission holders.  This facilitates quite a 
rich structure of permissions.  The question relates 
to the possibility of mapping a single vector 
(PermissionHolders) within a (say) User to the three 
RDB data sets that define Roles, Groups and Users.

Of course it is possible that the basic structure is 
flawed!

Thanks in anticipation,

MarcusUnix Systems Administrator

+61 3 9873 0155
+61 3 9720 7467 (fax)



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