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Cross reference items not available in .chk files [message #46237]

Fri, 29 May 2009 08:03

Eclipse User

Hi,

I'm trying to write checks (.chk file) for a model that contains cross
references to an another grammar/model. It looks like the cross references
are not available in the .chk file. No code completion for them and marked
as "unknown properties". For Example:

import myDslB;

context Attribute ERROR "Error" : type; // more to come here

Where "type" is a cross reference to another grammar and marked as an
error in the .chk editor. I also recognized a problem with the generated
ecore file. When opening it with the ecore editor and navigating to a
cross reference item, it gives

Problems encounterd in file "classpath:/org/xtext/example/MyDslA.ecore"
java.net.MalformedURLException: unknown protocol: classpath

Any ideas?

Christoph

P.S.: The grammars are:

grammar org.xtext.example.MyDslA with org.eclipse.xtext.common.Terminals

generate myDslA "http://www.xtext.org/example/MyDslA"

Model :
(imports+=Import)*
(datatypes+=DataType)*;

Import :
'import' importURI=STRING;

DataType:
'datatype' name=ID ';'?;

----

grammar org.xtext.example.MyDslB with org.eclipse.xtext.common.Terminals

import "classpath:/org/xtext/example/MyDslA.ecore" as MyDslA

generate myDslB "http://www.xtext.org/example/MyDslB"

Model :
(imports+=Import)*
(classes+=Class);

Import :
'import' importURI=STRING;

Class :
'class' name=ID '{'
properties+=Property*
'}';

Property:
Attribute | Reference;

Attribute:
'attr' name=ID ':' type=[MyDslA::DataType] ';'?;

Reference:
'ref' name=ID ':' type=[Class] ';'?;

Re: Cross reference items not available in .chk files [message #46325 is a reply to message #46237]

Fri, 29 May 2009 08:18

Eclipse User

Referencing ecore files using the classpath scheme is not good, since
resource sets need to be configured with a special URIConverter in order
to be able resolve classpath URIs.

EMF and so Xpand both do not support classpath URIs.

You should instead use a platform:/resource URI.

Cheers,
Sven

Christoph Kulla schrieb:
> Hi,
>
> I'm trying to write checks (.chk file) for a model that contains cross
> references to an another grammar/model. It looks like the cross
> references are not available in the .chk file. No code completion for
> them and marked as "unknown properties". For Example:
> import myDslB;
>
> context Attribute ERROR "Error" : type; // more to come here
>
> Where "type" is a cross reference to another grammar and marked as an
> error in the .chk editor. I also recognized a problem with the generated
> ecore file. When opening it with the ecore editor and navigating to a
> cross reference item, it gives
>
> Problems encounterd in file "classpath:/org/xtext/example/MyDslA.ecore"
> java.net.MalformedURLException: unknown protocol: classpath
>
> Any ideas?
> Christoph
>
> P.S.: The grammars are:
>
> grammar org.xtext.example.MyDslA with org.eclipse.xtext.common.Terminals
>
> generate myDslA "http://www.xtext.org/example/MyDslA"
>
> Model :
> (imports+=Import)*
> (datatypes+=DataType)*;
>
> Import :
> 'import' importURI=STRING;
>
> DataType:
> 'datatype' name=ID ';'?;
>
> ----
>
> grammar org.xtext.example.MyDslB with org.eclipse.xtext.common.Terminals
>
> import "classpath:/org/xtext/example/MyDslA.ecore" as MyDslA
>
> generate myDslB "http://www.xtext.org/example/MyDslB"
> Model :
> (imports+=Import)*
> (classes+=Class);
>
> Import :
> 'import' importURI=STRING;
>
> Class :
> 'class' name=ID '{'
> properties+=Property*
> '}';
>
> Property:
> Attribute | Reference;
>
> Attribute:
> 'attr' name=ID ':' type=[MyDslA::DataType] ';'?;
>
> Reference:
> 'ref' name=ID ':' type=[Class] ';'?;
>
>
>

Re: Cross reference items not available in .chk files [message #46385 is a reply to message #46325]

Fri, 29 May 2009 08:46

Eclipse User

Hi,

thanks Sven. I just used the "classpath:/" scheme as the documentation
says this it is the preferred way. I think it would be good when the
documentation lists the several schemes with their pro and cons.

Christoph

Re: Cross reference items not available in .chk files [message #46480 is a reply to message #46385]

Fri, 29 May 2009 16:33

Eclipse User

Yes, we just recently (because of the bug you submitted) realized that
the classpath scheme has its problems.
We'll update the documentation ASAP.

Thanks,
Sven

Christoph Kulla schrieb:
> Hi,
>
> thanks Sven. I just used the "classpath:/" scheme as the documentation
> says this it is the preferred way. I think it would be good when the
> documentation lists the several schemes with their pro and cons.
>
> Christoph

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