Hi David,
I did something similar a while ago : we gave the hability to create rules
for defining dynamic groups of users. The rules are made of pre-defined
basic operators ("is member of", "has role"...) but can be combined by the
user to define complex rules.
So to do that, we created a model for storing these rules and then we
convert these rules to EOF qualifiers when evaluating.
I'm not sure it will help but you can take a look at eos EORegle,
EORegleNode, EORegleOperateur :
https://subversion.renater.fr/cocktail/FRAMEWORKS/FwkCktlPersonne/trunk/Sources/org/cocktail/fwkcktlpersonne/common/metier/
...and components to edit rules like there was back then in the EOModeler :
https://subversion.renater.fr/cocktail/FRAMEWORKS/FwkCktlDroitsUtilsGuiAjax/trunk/Sources/org/cocktail/fwkcktldroitsutilsguiajax/serveur/components/
Cheers,
Alexis
2012/10/20 David Avendasora <[email protected]>
> Hey all,
>
> I've got a situation where I'm allowing the user to create some basic
> business rules within the application at runtime. I'm planning on creating
> EOQualifiers based on their input that will then be used to determine how
> to categorize EOs in one of our Entities. Kinda like:
>
> boolean studentMeetsRequirements =
> aSchool().enrollmentRequirement().evaluateWithObject(aStudent());
> if(studentMeetsRequirements) {
> aStudent().setStatus(StudentStatus.ACCEPTED);
> }
>
> In this example the user would be able to create an arbitrarily complex
> set of rules that I will then turn into the
> enrollmentRequirement()EOQualifier, and each School can have it's own set of
> rules which will be
> stored in the database just like any other attribute of a School.
>
> What I want to know is if anyone has done something similar and has a
> good design pattern for it. I've got a decent idea of how to do it, but
> before I go creating it I figured I'd ask if anyone has any experience they
> care to share. I'm specifically looking for ideas on how to store
> EOQualifiers in the database.
>
> Thanks!
>
> Dave
>
> —————————————————————————————
> *WebObjects** - so easy that even Dave Avendasora can do it!™*
> —————————————————————————————
> *David Avendasora*
> Senior Software Abuser
> Kaiten, Inc.
>
>
>
>
>
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