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Problem with ecore and the new generator [message #1737848]

Wed, 13 July 2016 09:40

Eclipse User

Hi,

I have problems with the new Xtext Generator from Xtext 2.10. It seams like there is a problem with the import of the Ecore metamodel. Using the old workflow everything works fine. Do I have to add something new? It is probably some small change I have to make, but I don't find a solution.

My grammar:

// automatically generated by Xtext
grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals

import "http://www.example.org/testModel"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore

Document returns Document:
	{Document}
	'Document'
	name=ID
	'{'
	('pages' '{' pages+=Page ("," pages+=Page)* '}')?
	'}';

Page returns Page:
	{Page}
	'Page'
	name=ID
	'{'
	('attributes' '{' attributes+=Attribute ("," attributes+=Attribute)* '}')?
	'}';

Attribute returns Attribute:
	{Attribute}
	'Attribute'
	name=ID
	'{'
	('type' type=[ecore::EClassifier|ID])?
	'}';

My workflow:

module org.xtext.example.mydsl.GenerateMyDsl

import org.eclipse.xtext.xtext.generator.*
import org.eclipse.xtext.xtext.generator.model.project.*

var rootPath = ".."

Workflow {
	
	component = XtextGenerator {
		configuration = {
			project = StandardProjectConfig {
				baseName = "org.xtext.example.mydsl"
				rootPath = rootPath
				runtimeTest = {
					enabled = true
				}
				eclipsePlugin = {
					enabled = true
				}
				eclipsePluginTest = {
					enabled = true
				}
				createEclipseMetaData = true
			}
			code = {
				encoding = "UTF-8"
				fileHeader = "/*\n * generated by Xtext \${version}\n */"
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.mydsl.MyDsl"
			fileExtensions = "mydsl"
			referencedResource = "platform:/resource/TestModel/model/testModel.genmodel"
			
			fragment = ecore2xtext.Ecore2XtextValueConverterServiceFragment2 auto-inject {}

			fragment = org.eclipse.xtext.generator.adapter.FragmentAdapter {
				fragment = org.eclipse.xtext.generator.ecore2xtext.FormatterFragment {}
			}

			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
			}
		}
	}
}

Part of the error message where the ecore model fails:

[TransformationDiagnostic: null:28 Cannot find compatible feature type in sealed EClass Attribute from imported package http://www.example.org/testModel: The existing reference 'type' has an incompatible type 'null'. The expected type is 'EClassifier' [org.eclipse.emf.ecore.EClassifier]. (ErrorCode: CannotCreateTypeInSealedMetamodel)]

The full error:

0    [main] INFO  text.xtext.generator.XtextGenerator  - Initializing Xtext generator
6    [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Adding generated EPackage 'org.eclipse.xtext.common.types.TypesPackage'
98   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl at 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl/'
98   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl.tests at 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl.tests/'
99   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl.ide at 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl.ide/'
99   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl.ui at 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl.ui/'
99   [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl.ui.tests at 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl.ui.tests/'
106  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Using resourceSet registry. The registered Packages will not be registered in the global EPackage.Registry.INSTANCE!
388  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://www.eclipse.org/Xtext/Xbase/XAnnotations' from 'platform:/resource/org.eclipse.xtext.xbase/model/Xbase.genmodel'
390  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://www.eclipse.org/xtext/xbase/Xtype' from 'platform:/resource/org.eclipse.xtext.xbase/model/Xbase.genmodel'
403  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://www.eclipse.org/xtext/xbase/Xbase' from 'platform:/resource/org.eclipse.xtext.xbase/model/Xbase.genmodel'
403  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://www.eclipse.org/xtext/common/JavaVMTypes' from 'platform:/resource/org.eclipse.xtext.common.types/model/JavaVMTypes.genmodel'
426  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://www.example.org/testModel' from 'platform:/resource/TestModel/model/testModel.genmodel'
426  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://www.eclipse.org/emf/2002/Ecore' from 'platform:/resource/org.eclipse.emf.ecore/model/Ecore.genmodel'
529  [main] ERROR xt.generator.XtextGeneratorLanguage  - [TransformationDiagnostic: null:28 Cannot find compatible feature type in sealed EClass Attribute from imported package http://www.example.org/testModel: The existing reference 'type' has an incompatible type 'null'. The expected type is 'EClassifier' [org.eclipse.emf.ecore.EClassifier]. (ErrorCode: CannotCreateTypeInSealedMetamodel)]
531  [main] ERROR mf.mwe2.launch.runtime.Mwe2Launcher  - Problems running workflow org.xtext.example.mydsl.GenerateMyDsl: Problem parsing 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl/../org.xtext.example.mydsl/src/org/xtext/example/mydsl/MyDsl.xtext':
TransformationDiagnostic: null:28 Cannot find compatible feature type in sealed EClass Attribute from imported package http://www.example.org/testModel: The existing reference 'type' has an incompatible type 'null'. The expected type is 'EClassifier' [org.eclipse.emf.ecore.EClassifier]. (ErrorCode: CannotCreateTypeInSealedMetamodel)
java.lang.RuntimeException: Problems running workflow org.xtext.example.mydsl.GenerateMyDsl: Problem parsing 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl/../org.xtext.example.mydsl/src/org/xtext/example/mydsl/MyDsl.xtext':
TransformationDiagnostic: null:28 Cannot find compatible feature type in sealed EClass Attribute from imported package http://www.example.org/testModel: The existing reference 'type' has an incompatible type 'null'. The expected type is 'EClassifier' [org.eclipse.emf.ecore.EClassifier]. (ErrorCode: CannotCreateTypeInSealedMetamodel)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:104)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:78)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:36)
Caused by: java.lang.IllegalStateException: Problem parsing 'file:/C:/Users/jekkt/workspace/ScenarioTools-Neon-OCL/org.xtext.example.mydsl/../org.xtext.example.mydsl/src/org/xtext/example/mydsl/MyDsl.xtext':
TransformationDiagnostic: null:28 Cannot find compatible feature type in sealed EClass Attribute from imported package http://www.example.org/testModel: The existing reference 'type' has an incompatible type 'null'. The expected type is 'EClassifier' [org.eclipse.emf.ecore.EClassifier]. (ErrorCode: CannotCreateTypeInSealedMetamodel)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorLanguage.initialize(XtextGeneratorLanguage.java:272)
	at org.eclipse.xtext.xtext.generator.StandardLanguage.initialize(StandardLanguage.java:169)
	at org.eclipse.xtext.xtext.generator.XtextGenerator.initialize(XtextGenerator.java:176)
	at org.eclipse.xtext.xtext.generator.XtextGenerator.checkConfigurationInternal(XtextGenerator.java:120)
	at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent2.checkConfiguration(AbstractWorkflowComponent2.java:21)
	at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.preInvoke(Mwe2Bridge.java:65)
	at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.preInvoke(AbstractWorkflowComponent.java:197)
	at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.preInvoke(AbstractCompositeWorkflowComponent.java:29)
	at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:18)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
	... 4 more

Attachment: projects.zip
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Re: Problem with ecore and the new generator [message #1737852 is a reply to message #1737848]

Wed, 13 July 2016 10:00

Eclipse User

i guess the problem is this one:

426 [main] INFO clipse.emf.mwe.utils.GenModelHelper - Registered GenModel 'http://www.eclipse.org/emf/2002/Ecore' from 'platform:/resource/org.eclipse.emf.ecore/model/Ecore.genmodel'

does this come from your genmodel?

can you please file a ticket at https://github.com/eclipse/xtext-core/issues/

i asume we have to circumvent loading this genmodel.

with a sample ecore and genmodel attached?

Re: Problem with ecore and the new generator [message #1738007 is a reply to message #1737852]

Thu, 14 July 2016 19:01

Eclipse User

I think this comes form the GenModel or the Xtext generator.
Since my grammar (and my model) uses ecore::EClassifier, the Ecore GenModel is needed to generate the language artifacts.

Yes I can file a ticket there.
Do you think this is a bug in the Xtext generator itself?

Re: Problem with ecore and the new generator [message #1738015 is a reply to message #1738007]

Fri, 15 July 2016 01:52

Eclipse User

Yes

Re: Problem with ecore and the new generator [message #1738407 is a reply to message #1738015]

Tue, 19 July 2016 09:32

Eclipse User

Here is the link to the Issue: https://github.com/eclipse/xtext-core/issues/41
I hope this is enough and someone can look over this soon Smile

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