Re: [namedgraphs] Todo for next version

[Olaf H. <ha...@in...>]

On Friday 19 June 2009 17:53:25 Tim Pizey wrote:
> Hi Olaf, Jennifer and all,
>
> I have started to bringNG4J inline with current Jena.
>
> Most changes are pretty trivial. However there appears to be a
> hack where we treat List<NamedGraph> and List<Graph>
> as covariant which will no longer work.

Where does this "problem" surface - in the constructors of the UnionGraph 
class?
It is strange because a NamedGraph is a Graph. For this reason the compiler 
should understand that a list of NamedGraph objects can be used as a list of 
Graph objects.

> Do you have a plan,

Not really a good one. We could use List<Graph> instead of List<NamedGraph> 
and since we add only NamedGraph objects to this list we can safely cast each 
member of the list to a NamedGraph. However, that's a hack. What do you (and 
the others) think?

> are there other pitfalls? 

I don't know.

Olaf