Jörn Kottmann wrote:
> Is that the correct generification?
> Class<? extends AbstractCas> getRequiredCasInterface();
>
> Implementing classes can then specify the concrete return
> type.
>
> For example:
> Class<JCas> JCasAnnotator_ImplBase.getRequiredCasInterface()
> Class<CAS> CasAnnotator_ImplBase.getRequiredCasInterface()
I tried:
public static void tgrci(AnalysisComponent ac) {
Class<JCas> x = ac.getRequiredCasInterface();
}
but it doesn't work, gives error:
// error, cannot convert from Class<capture#4-of ? extends AbstractCas>
to Class<JCas>
This is with the interface AnalysisComponent defining
getRequiredCasInterface as:
Class<? extends AbstractCas> getRequiredCasInterface();
This works:
public static void tgrci(AnalysisComponent ac) {
Class<? extends AbstractCas> x = ac.getRequiredCasInterface();
}
and this works too:
public static void tgrci(AnalysisComponent ac) {
Class<JCas> x = ((JCasAnnotator_ImplBase)ac).getRequiredCasInterface();
}
So, I think we have the correct generification in the interface
AnalysisComponent, of return <? extends AbstractCAS>.
-Marshall.
> Jörn
>
>
>
