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From Jörn Kottmann <kottm...@gmail.com>
Subject Re: clarifying a generics issue
Date Wed, 12 Aug 2009 09:36:22 GMT
Jörn Kottmann wrote:
> Marshall Schor wrote:
>> I'll probably stop trying to convince others if they continue to feel
>> that the tradeoffs here should be in the direction of returning only
>> specific types (disallowing users from specifying downcasting in that
>> manner), versus using types of the form T extends X,
>> which allows users to specify downcasting.
>>   
> The case of FSIndexRepository is maybe more clear
> then the other cases in our API.
>
> With down casting it could be changed to
>
> interface FSIndexRepository {
> <T extends FeatureStructure> FSIndex<T> getIndex(String label);
> <T extends FeatureStructure> FSIterator<T> getAllIndexedFS(Type aType);
> ...
> }
>
> and then a user could write
>
> FSIndex<AnnotationFS> index = repo.getIndex(...);
> FSIterator<AnnotationFS> it = repo.getAllIndexedFS(...);
Any opinions on this ? Right now the class is not generified but I
would like to change that before the release.

Jörn

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