Re: How to express conditional dependency between components in UML?

Petri J. Riipinen wrote: 
Hi folks,

How would one express a conditional dependency between two components in UML (2.0) component diagram?

This is the situation: Component A (an executable) uses Component B (a DLL) by dynamically instantiating a class from it but only if certain programmatic parameter, PAR1, is set to value TRUE. The value of the parameter is stored into an .ini-file that is read by Component A on startup. If PAR1 is FALSE or missing, Component A doesn't need Component B at all. There is no static reference from Component A to Component B, everything is done dynamically.

Currently I just draw a dependency-link from Component A to Component B, but that doesn't exactly describe the conditional nature of the dependency.

Is there any guideline how to do this in UML or should I just use a note and explain the issue in the note?

- Pete

I dont know how :) but I think you can use OCL to express this type of "relations".

Bye.

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Antonio Santiago Pérez
( email: santiago<<at>>grahi.upc.edu       )
(   www: http://www.grahi.upc.edu/santiago )
(   www: http://asantiago.blogsite.org     )
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GRAHI - Grup de Recerca Aplicada en Hidrometeorologia
Universitat Politècnica de Catalunya
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