Grouper Developers Forum

["GW Brown, Information Systems and Computing" <>]

--On 27 January 2005 07:14 -0800 blair christensen <> 
wrote:

> On 2005.01.27 14:56, GW Brown, Information Systems and Computing wrote:
> > The sort of things that I am thinking of are dependent attributes e.g. a
> > unit of study may belong to a department which belongs to a faculty. I
> > need  to check that each individual unit_code, dept_code and
> > faculty_code exist,  but also that dept_code is valid given the
> > faculty_code and that unit_code  is valid given the dept_code. Group
> > types might 'modify' the validation.
>
> That helps, thanks.
>
> > I can't think of anything else at the moment. The key thing is that it
> > occurs in the API rather than say the UI since a Loader should be
> > subject  to the same validation.
>
> I agree.
>
> > One way of achieving this would be to treat the above as events and to
> > register listeners which can veto the action.
>
> This is what I've been thinking in the abstract.  I haven't quite moved
> on to how to do this specifically for Grouper.  Are there other apps or
> libraries that do something like this that would serve as a good model?
> I admit I haven't looked yet.

Swing uses lots of events / listeners, but otherwise the JavaBean 
specification gives the 'design patterns' for method signatures. I would be 
happy with Unicast delivery (only one event listener per event type) 
initially.
> > It would be nice to have the group + attribute assignment be an atomic
> > process otherwise we could end up with a lot of half finished groups
> > i.e.  all the important attributes might not be set.
>
> I agree.
>
> > The same may be true of adding members e.g.
> > listAddVals(GrouperSession s, List groupMembers).
>
> I already had that slated for addition.
>
> And now for the obligatory question: where would you (and others on the
> list) rank the addition of external data validators on the priority
> list?
It would be 'nice' to have them for the 0.6 release. I think they are 
necessary before we can sell Grouper as a production system, but since 0.6 
will be the first UI release we could get away with saying they will come 
in 0.65 / 0.7.


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GW Brown, Information Systems and Computing