[rules-users] Newbie question: can I create a variable in the rules file?

[Rented User]

Hi,

I'm mew to this rules stuff, and although I've looked at rules engines such
as Corticon before, I got introduced to JBoss Rules through JBoss Seam's
security mechanism.

I'm trying to expand on Seam's built in functionality to assess a user's
permissions. My use case is that a user of the system may or may not have
permission to a resource based on the user's role AND the current date. The
system accepts certain actions only if "now" is between a certain start and
end date. What I'd like to do is something like this:

rule CanDoHisStuff
  activation-group "permissions"
when
  c: PermissionCheck(name == "stuff", action == "do", granted = false)
  now: new Date()
<--------------------------------------------------------------How can I
accomplish this?
  ap: AppProps()
  Role(name == "A Role")
 eval(now >= ap.startDate, now <= ap.endDate)
then
  c.grant();
end;

Now, I understand that in my code, I could assert an object "now". However,
a lot of the security is hidden behind the scenes in Seam. For example, this
rules will be fired from an XML definition file. E.g.

    <page view-id="/restricted/doStuff.xhtml">
        <restrict>#{s:hasPermission('stuff', 'do', null)}</restrict>
        <navigation from-action="#{createStuffManager.yesConfirmSave}">
            <end-conversation/>
            <redirect view-id="/restricted/viewStuff.xhtml"/>
        </navigation>
    </page>

While I could start extending Seam's security model, that seems a bit
invasive for such a simple task.

Thanks

/Kris
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