typeSystemInit() method in CasAnnotator_ImplBase but not JCasAnnotator_ImplBase

[Philip Ogren]

Thilo had pointed me towards the method typeSystemInit() in a recent 
posting as a way of getting type system information in an annotator.  Is 
there a reason that this method exists in CasAnnotator_ImplBase but not 
JCasAnnotator_ImplBase?  Or is this an omission?  My intuition is that 
might have been left out on purpose because when using the JCas you 
typically would have a fixed type system that is determined at compile 
time. Still, it seems useful to be able to override typeSystemInit() 
even if it is only called once.  I didn't really think carefully about 
which Annotator_ImplBase I should use.  Are there far reaching 
consequences I should consider - or is it really just about convenience 
at the API level? 

Thanks,
Philip