Getting access to route-generating helpers from a migration

Is there any way to get access to a RESTful named route helper from a

I'd like to place URLs generated from these routes into a DB table and
wanted to manage the static data by using a migration. So I'd like to
be able to get at the URL generated by something like "posts_url", for

Is this doable? Is there some way that I can either include an
appropriate module in my migration class or directory interrogate the
Routing class to get this URL?