[great-users] How to model: no. of created objects depends on srcmodel-attribute

[Simon Görke]

Hi there,

I intend to realize the following GREAT transformation:
- the source model contains a number of objects (GME atoms) of type A with
an integer-type attribute "count"
- the number of objects (type B atoms) to be instantiated in the destination
model depends on the number of a-type objects (no problem), but (problem)
also on the value of the "count"-attribute:

Considering one of the a-type objects found in the source model, this means
(a.count==1):  instantiate   1 type-B atom
(a.count==2):  instantiate   2 type-B atoms
               .
               .
               .
(a.count==x):  instantiate   x type-B atoms


Being a GREAT-newbie, I am not sure how to model this kind of
transformation. One idea might be recursion using an ExpressionRef-rule and
a (temporary) counter object in the "Global Container".
Question is: is there a more direct solution to this? I guess this class of
problem (attribute does not restrict the search pattern but induces multiple
(variable number of) instantiations) is not restricted to my task.

Regards
Simon