Re: [eclipse-incubator-e4-dev] Initial discussion on the 'modelled' work

[Kevin McGuire <Kevin_McGuire@xxxxxxxxxx>]

Hi Tom,

Yeah, I wasn't worried about Java<->_javascript_ so much as we've already
done some successful investigation into that.  But I guess my confusion
was that I forgot that EMF isn't special in this regard... if you can cross
call from one language to another (dealing with the types in whatever manner)
then you can do so in EMF because it just gens to the target language in
each case.  Is that right? (Newby EMF guy here).

Kevin

Tom Schindl <tom.schindl@xxxxxxxxxxxxxxx>
Sent by: eclipse-incubator-e4-dev-bounces@xxxxxxxxxxx

04/07/2008 03:57 PM

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Subject	Re: [eclipse-incubator-e4-dev] Initial discussion on the 'modelled'        workbench UI

Kevin McGuire schrieb:
> 
>  >>I think the contrary is the case.  A weakly typed
with almost no metadata
>  >>leaves the user with code that's right only if it behaves
right after
>  >>extensive testing.
> 
> Just to get ahead of things, I'd like to avoid discussions that reduce
> down to the merits of a static typing vs. weak typing vs....  Not
that I 
> thought you were doing this Ed, just making a blanket statement early
> in.  You know, there's more than a few former Smalltalk programmers
here 
> (sniff) and I'd love to live in a world where our Java doesn't require
> extensive testing.  At this point, everyone's picked sides, the
> arguments have been played out, and beliefs border on the religious
> without much chance of converting someone.
> 
> I'm completely with you in the value of first class metadata support.
> 
> What's clear is that we'll need to drive the model from languages
which 
> run the gammut of typing.  Your response below Ed suggests that
EMF is 
> flexible in this regard, right?  But is that just in the definition
of 
> the model or in consumption too?  How do we say access a strongly
typed 
> EMF model from a language like _javascript_?
> 

Are we talking about _javascript_ in the browser or _javascript_ as part of
the JVM?

If we talk about Scripting inside the VM, they have access to all 
Java-Types you give it access to via imports or using fully qualified 
names.

So far I only used Groovy where you could simply pass this script to the
engine and it knows what to do.

---------8<---------
"
import org.eclipse.e4.AddressBook;

AddressBook addressbook = new AddressBook();
addressbook.addPerson(new org.eclipse.e4.Person("Kevin"));
"
---------8<---------

I haven't used Rhino but I think it works a bit different because Eric
is somehow wrapping it in a ScritableObject where the conversion has to
happen in the put-method in case the given parameter doesn't match the
one coming from the client.

Tom

-- 
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