[TYPO3-mvc] resolve single table inheritance objects

[Felix Oertel]

hey,

something i talked about with different people (thanks fkoch for your 
input) bothers me again and i would like to find a "final" solution.

using single table inheritance, i've got a class Event (which is not to 
be used directly) and the inherited classes Workshop and Exhibition. 
i've got an Event-, Workshop- and Exhibition-repository.

case 1:
i want to select a workshop. i do $workshopRepository->findOneBy*() and 
i'll get back an Workshop-object.

case 2:
i want to select a group of events of different types. i do 
$eventRepository->findBy*() and i'll get back an objectStorage with some 
Event-objects in it.
this is not what i want. ;) i'd more like to get back an objectStorage 
with mixed Workshop- and Exhibition-objects.

at a first glance my idea would be to resolve the correct object-type 
trough the sti-configuration. we could go the other way around, read out 
the type-field from the db, look up which class is supposed to handle 
this and then build the object of the correct type in the dataMapper.

what do you think? is there something similar in FLOW3 we have to care 
about? any ideas?

regards, foertel