beforeField and afterField relations do not work with equalTo or Whitelists

[pdaulbyscottlogic]

Bug Report

When attempting to use a beforeField or afterField relation on fields with inSet constraints the following error is returned: java.lang.UnsupportedOperationException: cannot combine sets with <before|after> relation, Issue #1489 Some discussion of this from #1571 repeated below:

Before/after are more complicated, as theoretically each of the values must be translated to a range. This therefore means the result is a set of restrictions. Unfortunately, the system isn't designed to be passing around a set of restrictions at this time in the program. Therefore, this will take further thought.

A possible solution is to take the most restrictive of the values. This would ensure that whichever values are picked are permissable, but would severely limit the number of values output.

[sl-slaing]

@d-withers could you check to see if this is still an issue - if not can you close it off please.

[d-withers]

Confirmed this is still an issue -- there is a hardcoded error tagging this bug when attempting this (java.lang.UnsupportedOperationException: cannot combine sets with before/after relation, Issue #1489). Looks like the equalToOffset case was fixed in #1571 but the before/after cases were not. I'll update the ticket description.