Hi Itai,
>>>>> "Itai" == Itai Tavor <[EMAIL PROTECTED]> writes:
Itai> Say I got several Participants, and some of those need to be
Itai> able to place orders. I create the Specialist
Itai> OrderingEntities to implement the role of 'someone who
Itai> places orders'. From what I understand about using
Itai> Specialists to extend a class behavior, this Specialist
Itai> should add the properties it needs to track orders with to
Itai> the Participant classes - I should not have to go in to
Itai> every Participant class and add the property to it, because
Itai> those classes don't know and don't care that they might be
Itai> used in this role. Am I wrong in this? Otherwise, the only
Itai> other way to track properties for this role would be to
Itai> physically store a new object on the OrderingEntities Rack
Itai> for every Participant class accessed, but what's the point
Itai> in that, if I can simply add the property to the original
Itai> class?
No.. you're right here. I've never used property sheets in this way,
just because it's seemed too much trouble to check for existence, then
add if necessary... etc. If I need to have a property set in an
instance... I just set it, using an external method. (Or I add it at
the ZClass level.) It's important to be careful though... if there is
already a property with that name.... there could be a clash.
Obviously application integration needs to be done with full
awareness of the different attributes used by each component.
Itai> Making small steps up the ZPatterns mountain (and too many
Itai> of them backwards),
Yup.. me too. ;-) But it's better than sticks and bones..
take care,
-steve
Itai> Itai -- Itai Tavor "Je sautille, donc je suis." C3Works
Itai> [EMAIL PROTECTED] - Kermit the Frog
Itai> "If you haven't got your health, you haven't got anything"
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