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How to resolve cross-references from xtext to xmi? [message #742476]

Thu, 20 October 2011 14:27

Ioana

Messages: 6
Registered: March 2011

Junior Member

Hi,

I'm trying to serialize a xtext model to a xmi, but I've observed that sometimes the cross-refence resolution is not being resolved.

e.g.


entity A
entity B

datatype Str

test T1(
  ent A
  type Str
)

is being serialized to xmi:

 <elements xsi:type="dml:Entity" name="A"/>
 <elements xsi:type="dml:Entity" name="B"/>
 <elements xsi:type="dml:Datatype" name="Str"/>
 <elements xsi:type="Test" name="T1">
    <ent  href="platform:/resource/TestProject/proj/test.dml#xtextLink_::0.3.10::3::/17"/>
    <type href="platform:/resource/TestProject/proj/test.dml#xtextLink_::0.3.10::4::/21"/>
  </elements>

instead of:

<elements xsi:type="dml:Entity" name="A"/>
 <elements xsi:type="dml:Entity" name="B"/>
 <elements xsi:type="dml:Datatype" name="Str"/>
 <elements xsi:type="Test" name="T1" ent="//@elements.0" type="//@elements.2"/>

I've used the following code to realize the serialization:

XMIResource res = new XMIResourceImpl(URI.createURI(exactLocation + xmiFileName + ".xmi"));						res.getContents().add(parseResult.getRootASTElement());
res.save(null);
res.unload();

Why isn't working?

Thank you in advance

Ioana

P.S. The quoted example is processed and the linking fragments may not the ok

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Re: How to resolve cross-references from xtext to xmi? [message #742482 is a reply to message #742476]

Thu, 20 October 2011 14:34

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

the problem is the parseResult.getRootASTElement());
this gives you an unlinked model.
you should read the model as described here
http://wiki.eclipse.org/Xtext/FAQ#How_do_I_load_my_model_in_a_standalone_Java_application.C2.A0.3F

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: How to resolve cross-references from xtext to xmi? [message #742502 is a reply to message #742482]

Thu, 20 October 2011 14:53

Ioana

Messages: 6
Registered: March 2011

Junior Member

Thank you for your solution. I've tried it and instead off

res.getContents().add(parseResult.getRootASTElement());

I've used

res.getContents().add(model)

after implementing everything like in the link described. Unfortunately, it's not working. The cross-references of the serialized model are not resolved.

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Re: How to resolve cross-references from xtext to xmi? [message #742515 is a reply to message #742502]

Thu, 20 October 2011 15:06

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

the following works for me

public static void main(String[] args) throws IOException {
		Injector injector = new MyDslStandaloneSetup().createInjectorAndDoEMFRegistration();
		ResourceSet resourceSet = injector.getInstance(XtextResourceSet.class);
		Resource xtextResource = resourceSet.getResource(URI.createURI("src/test.mydsl"), true);
		xtextResource.load(null);
		EcoreUtil.resolveAll(xtextResource);
		Resource xmiResource = resourceSet.createResource(URI.createURI("src/test.xmi"));
		xmiResource.getContents().add(xtextResource.getContents().get(0));
		xmiResource.save(null);
	}

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: How to resolve cross-references from xtext to xmi? [message #742663 is a reply to message #742502]

Thu, 20 October 2011 17:57

Moritz Eysholdt

Messages: 161
Registered: July 2009
Location: Kiel, Germany

Senior Member

Hi Ioana,

res.getContents().get(0) returns the same as
parseResult.getRootASTElement(). Therefore,
res.getContents().add(parseResult.getRootASTElement()); has no effect.

To solve your problem, you'll need to call
EcoreUtil.resolveAll(xtextResource);
before you serialize your model.

If you then still have cross reference in the format
"xtextLink_::0.3.10:" in your serialized model, then the Xtext file you
have been parsing contains linking errors.

regards,
Moritz

On 20.10.11 16:54, Ioana wrote:
> Thank you for your solution. I've tried it and instead off
> res.getContents().add(parseResult.getRootASTElement());
>
> I've used res.getContents().add(model) after implementing everything
> like in the link described. Unfortunately, it's not working. The
> cross-references of the serialized model are not resolved.

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Re: How to resolve cross-references from xtext to xmi? [message #752161 is a reply to message #742663]

Wed, 26 October 2011 09:44

Ioana

Messages: 6
Registered: March 2011

Junior Member

Hi,

thank you a lot. Your solution and your explanation works now for me. I assumed you must first resolve all the references, but I didn't know how.

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