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Couldn't resolve reference to *** problem [message #1771348] Thu, 24 August 2017 10:08 Go to next message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
Member
Hi

When I create a model using xtext(the DSL grammar is generated by default.)
It always alert the error about "Couldn't resolve reference to *** problem"


The Reference name as "sample.cps.host.FirstHostClass0".

index.php/fa/30485/0/

I only change the NameProvider in Xtext, because I want us the name as the ID. But if do not have this kind of change, the model part also alert this problem.

Dose anyone can help me to fix it?
I update the meta-model and model under the attachment.

Thanks Very Much

[Updated on: Thu, 24 August 2017 11:37]

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Re: Couldn't resolve reference to *** problem [message #1771351 is a reply to message #1771348] Thu, 24 August 2017 10:12 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 12029
Registered: July 2009
Senior Member
you may not call QualifiedName.create(ide.identifier)
if identifier contains a .

=>

use an Injected IQualifiedNameConverter instead


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Re: Couldn't resolve reference to *** problem [message #1771365 is a reply to message #1771351] Thu, 24 August 2017 11:40 Go to previous messageGo to next message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
Member
Great~! It works! Thanks for you quick replay. Christian.

And I think I need deeply study Xtext help document.

Thanks again.
Re: Couldn't resolve reference to *** problem [message #1771375 is a reply to message #1771351] Thu, 24 August 2017 12:29 Go to previous messageGo to next message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
Member
Hi Christian,

I also have a question. If I open a big size of textual model (3-4MB), Open the Xtext editor is very slow.

But in XMIResource, the have a option ,'OPTION_DEFER_IDREF_RESOLUTION ', to 'Defer resolution of same document references until the end of the document is reached'.

How the Xtext to handle the big size model?
Re: Couldn't resolve reference to *** problem [message #1771376 is a reply to message #1771375] Thu, 24 August 2017 12:32 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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id rather use a profiler to see "what" is actually so slow

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Re: Couldn't resolve reference to *** problem [message #1771420 is a reply to message #1771376] Fri, 25 August 2017 02:17 Go to previous messageGo to next message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
Member
Yes, I will.

After I use Java VisualVM to monitor the Eclipse platform, when open a big size xtext file using xtext editor.

I find that the org.eclipse.emf.ecore.util.EcoreUtil$ProperContentIterator.hasNext() take a long time. And it is called by xtext.validate .

index.php/fa/30504/0/

index.php/fa/30505/0/

So how we can handle this problem?
Do we have a way, only trigger the Xtext validation at the saving time.
Re: Couldn't resolve reference to *** problem [message #1771423 is a reply to message #1771420] Fri, 25 August 2017 04:28 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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do your objects have ids? this is unusual

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Re: Couldn't resolve reference to *** problem [message #1771426 is a reply to message #1771423] Fri, 25 August 2017 05:30 Go to previous messageGo to next message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
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Yes, each of the element has a name, use it as ID to identity each other.
I attach the newest meta-model & model instance.

[Updated on: Fri, 25 August 2017 06:06]

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Re: Couldn't resolve reference to *** problem [message #1771427 is a reply to message #1771426] Fri, 25 August 2017 05:36 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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Can you rename this to something else . Xtext ususallly uses name

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[Updated on: Fri, 25 August 2017 05:37]

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Re: Couldn't resolve reference to *** problem [message #1771432 is a reply to message #1771427] Fri, 25 August 2017 05:52 Go to previous messageGo to next message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
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Sorry for my unclear description.

In this meta-model, it use the attribute 'identifier=EString' as the ID. Not the 'name'.

Like:
CyberPhysicalSystem returns CyberPhysicalSystem:
{CyberPhysicalSystem}
'CyberPhysicalSystem'
identifier=EString
'{'
('dbUrl' dbUrl=EString)?
('appTypes' '{' appTypes+=ApplicationType ( "," appTypes+=ApplicationType)* '}' )?
('requests' '{' requests+=Request ( "," requests+=Request)* '}' )?
('hostTypes' '{' hostTypes+=HostType ( "," hostTypes+=HostType)* '}' )?
'}';
Re: Couldn't resolve reference to *** problem [message #1771433 is a reply to message #1771432] Fri, 25 August 2017 05:55 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 12029
Registered: July 2009
Senior Member
argggg we are talking not about the same thing.
ususally validate_UniqueID
does nothing since EcoreUtil.getID(eObject); returns null.
why does it find an id in your case.
please debug.
that validate method is a default emf method and its impl might have a bad o(n2) implementation


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Re: Couldn't resolve reference to *** problem [message #1771436 is a reply to message #1771433] Fri, 25 August 2017 06:01 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 12029
Registered: July 2009
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otherwise you might have to bind a custom validator that overrides the bevaviour and does not do this validation

public class CompositeEValidator2 extends CompositeEValidator {
	@Override
	protected void initDefaults() {
		if (isUseEObjectValidator()) {
			this.addValidator(new EObjectValidator() {
				@Override
				public boolean validate_UniqueID(EObject eObject, DiagnosticChain diagnostics,
						Map<Object, Object> context) {
					// don't check
					return true;
				}
				@Override
				public boolean validate_EveryProxyResolves(EObject eObject, DiagnosticChain diagnostics,
						Map<Object, Object> context) {
					// don't check, we have our own implementation, which creates nicer messages
					return true;
				}
				
				@Override
				public boolean validate_NoCircularContainment(EObject eObject, DiagnosticChain diagnostics,
						Map<Object, Object> context) {
					// don't check
					return true;
				}
			});
		}
	}
}


class MyDslRuntimeModule extends AbstractMyDslRuntimeModule {

	def Class<? extends CompositeEValidator> bindCompositeEValidator() {
		return CompositeEValidator2
	}
}


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Re: Couldn't resolve reference to *** problem [message #1771438 is a reply to message #1771436] Fri, 25 August 2017 06:03 Go to previous message
Nicholas Kong is currently offline Nicholas KongFriend
Messages: 49
Registered: July 2016
Location: China
Member
OK, Thanks for your quick reply.
I will debug and try it.

Thanks very much.

Christian
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