Issue: Modules can only open resources as streams

[forax at univ-mlv.fr]

----- Mail original -----
> De: "David M. Lloyd" <david.lloyd at redhat.com>
> À: forax at univ-mlv.fr
> Cc: jpms-spec-experts at openjdk.java.net
> Envoyé: Mardi 22 Mars 2016 22:02:38
> Objet: Re: Issue: Modules can only open resources as streams
> 
> On 03/22/2016 12:13 PM, forax at univ-mlv.fr wrote:
> > ----- Mail original -----
> >> De: "David M. Lloyd" <david.lloyd at redhat.com>
> >> À: "Remi Forax" <forax at univ-mlv.fr>
> >> Cc: jpms-spec-experts at openjdk.java.net
> >> Envoyé: Mardi 22 Mars 2016 14:02:54
> >> Objet: Re: Issue: Modules can only open resources as streams
> >>
> >> URI is definitely better than URL.  However it doesn't really solve the
> >> points I listed below.  It would really be useful for a resource to be a
> >> handle with size, stream, and origin class loader/module fields.
> >
> > from an URI, you can call toURL() and get access to the size, the stream
> > etc.
> >
> > thinking a little more on this, you can already have access to the URI of a
> > resource of a module by using the ModuleReader, from the ModuleReference,
> > from the Configuration, from the Layer ...
> >
> >    try(ModuleReader reader =
> >    module.getLayer().configuration().findModule(module.getName()).get().reference().open())
> >    {
> >      Optional<URI> uri = reader.find(resourseName);
> >      ...
> >    }
> >
> > obviously, directly exposing the ModuleReader might be a good idea :)
> 
> Knowing which module your resource came from is definitely a key
> requirement.  I'm not sure what URI actually will benefit in this case
> though.  Not only do you have to switch it to URL to actually use it to
> load anything, but by returning URI, modules lose the ability to send
> back URLs with custom behaviors.  Also it means that every resource
> needs an absolute location, which is an unnecessary constraint as far as
> I can see.

not an absolute location per se, like an URI of a resource inside a jar,
the URI is composed of the name of the module and the name of the resource.

> 
> --
> - DML
> 

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