Am Mittwoch, 19. Mai 2010 00:07:59 schrieb Karen Etheridge: > > But how am I supposed to tackle this problem using Moose/PRANG? Changing > > the 'isa' property of Moose attributes at runtime based on the value of > > another attribute (holding the MODS version number) seems weird. > > I'd be glad if someone could describe possible solutions and/or point to > > existing code solving this kind of problem. > > How about a parameterized role that took the version number as a parameter? > Then you could define the attribute type constraints with that version in > mind, and all the work would be done at compile time.
Given that I know more or less nothing about parameterized roles (not that I'd know much about plain roles, either) I should probably shut up now and rtfm first - but the mentioning of "compile time" leaves me wondering how it would be possible to parse MODS records at runtime whose versions I don't know beforehand (or even how to deal with MODS records in different versions in a longer running process)? But as I said I need to become acquainted with parameterized roles first. Best, Heiko
