attribute resolver script

[Peter Schober]

* Michael Dahlberg <olgamirth at gmail.com> [2016-11-09 15:34]:
> Any suggestions on why/when you would choose a mapped attribute over
> a scripted attribute?

I'd chose any other method over scripted, if there are alternatives.

* configuration > programming
  (though maybe Scott's comments about Mapped specifically should be
  taken to mean there might be exceptions)
  
* no issues wrt Java and scripting engine version (Rhino vs. Nashorn)
  (or adding and updating scripting engines for other languagues,
  e.g. JPython)

* performance, at least theoretically

-peter