Eclipse Community Forums: TMF (Xtext) » Multiple Xtext files and Same Ecore

Home » Modeling » TMF (Xtext) » Multiple Xtext files and Same Ecore(Multiple Xtext and Same Ecore)

Multiple Xtext files and Same Ecore [message #1852066]

Thu, 28 April 2022 06:12

Eclipse User

Hi,

I am trying to create several grammars for the same ecore within a project. The thing is that I think that I have problem in the generation of the Xtext Artifacts (Run the MWE2 Workflow), because I think that only one grammar is generated. So, probably I miss something in the mwe2 file. I put combined grammar= false, but it seems that is not sufficient.

Find attached a zip file with both xtext files and the mwe2 file. What am I missing? Of course, If is necessary I can upload a complete minimal example. Xtext version 2.25.

Thanks a lot.

Kind regards,
Antonio

Attachment: example-mwe2-2xtext.zip
(Size: 1.74KB, Downloaded 135 times)

Re: Multiple Xtext files and Same Ecore [message #1852070 is a reply to message #1852066]

Thu, 28 April 2022 06:28

Eclipse User

the grammars should have different names

can you provide the workflow log too?
what do you derive " because I think that only one grammar is generated" from?
what error do you see?

[Updated on: Thu, 28 April 2022 06:29] by Moderator

Re: Multiple Xtext files and Same Ecore [message #1852074 is a reply to message #1852070]

Thu, 28 April 2022 07:40

Eclipse User

Hi Christian,

Thanks for the prompt reply.

Indeed, the grammars have different names

language = StandardLanguage {
			name = "org.xtext.example.mydsl.MyDsl8"
			fileExtensions = "mydsl8"
			referencedResource = "platform:/resource/mydsl8/model/MyDSL8.genmodel"
			
			fragment = ecore2xtext.Ecore2XtextValueConverterServiceFragment2 auto-inject {}

			formatter = {
				generateStub = true
				generateXtendStub = true
			}

			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			parserGenerator={
				combinedGrammar=false
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
						
		}
		
		language = StandardLanguage {
			name = "org.xtext.example.mydsl.MyDsl9"
			
			fileExtensions = "mydsl9"
			referencedResource = "platform:/resource/mydsl8/model/MyDSL8.genmodel"
			
			fragment = ecore2xtext.Ecore2XtextValueConverterServiceFragment2 auto-inject {}

			formatter = {
				generateStub = true
				generateXtendStub = true
			}

			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			parserGenerator={
				combinedGrammar=false
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
			
		}

This is the log:

0    [main] INFO  text.xtext.generator.XtextGenerator  - Initializing Xtext generator
4    [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Adding generated EPackage 'org.eclipse.xtext.common.types.TypesPackage'
104  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl8 at 'file:/D:/EclipseS/2022/1.Eclipse-DSL/workspaces/6.xtext-cross-references-semantic-predicates/org.xtext.example.mydsl8.parent/org.xtext.example.mydsl8/'
105  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl8.tests at 'file:/D:/EclipseS/2022/1.Eclipse-DSL/workspaces/6.xtext-cross-references-semantic-predicates/org.xtext.example.mydsl8.parent/org.xtext.example.mydsl8.tests/'
105  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl8.ide at 'file:/D:/EclipseS/2022/1.Eclipse-DSL/workspaces/6.xtext-cross-references-semantic-predicates/org.xtext.example.mydsl8.parent/org.xtext.example.mydsl8.ide/'
105  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl8.ui at 'file:/D:/EclipseS/2022/1.Eclipse-DSL/workspaces/6.xtext-cross-references-semantic-predicates/org.xtext.example.mydsl8.parent/org.xtext.example.mydsl8.ui/'
106  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Registering project org.xtext.example.mydsl8.ui.tests at 'file:/D:/EclipseS/2022/1.Eclipse-DSL/workspaces/6.xtext-cross-references-semantic-predicates/org.xtext.example.mydsl8.parent/org.xtext.example.mydsl8.ui.tests/'
113  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Using resourceSet registry. The registered Packages will not be registered in the global EPackage.Registry.INSTANCE!
253  [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'
255  [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'
261  [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'
261  [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'
263  [main] INFO  clipse.emf.mwe.utils.GenModelHelper  - Registered GenModel 'http://myDSL8' from 'platform:/resource/mydsl8/model/MyDSL8.genmodel'
372  [main] INFO  lipse.emf.mwe.utils.StandaloneSetup  - Using resourceSet registry. The registered Packages will not be registered in the global EPackage.Registry.INSTANCE!
455  [main] INFO  text.xtext.generator.XtextGenerator  - Generating org.xtext.example.mydsl.MyDsl8
1172 [main] INFO  text.xtext.generator.XtextGenerator  - Generating org.xtext.example.mydsl.MyDsl8
1632 [main] INFO  text.xtext.generator.XtextGenerator  - Generating common infrastructure
1647 [main] INFO  .emf.mwe2.runtime.workflow.Workflow  - Done.

I said this "because I think that only one grammar is generated" because in the log I only see that this grammar "Generating org.xtext.example.mydsl.MyDsl8" is generated and nothing w.r.t. Generating org.xtext.example.mydsl.MyDsl9

Kind regards,
Antonio

Re: Multiple Xtext files and Same Ecore [message #1852076 is a reply to message #1852074]

Thu, 28 April 2022 07:43

Eclipse User

Hi again,

sorry, I also get these errors.

index.php/fa/42024/0/

Thanks.

Kind regards,
Antonio

Attachment: xtext-errors.png
(Size: 152.45KB, Downloaded 434 times)

Re: Multiple Xtext files and Same Ecore [message #1852078 is a reply to message #1852076]

Thu, 28 April 2022 07:52

Eclipse User

Hi

If you want multiple *.xtext and a single *.ecore, it is very unlikely that there is an auto-generated *.ecore that is identical for each *.xtext. You must therefore use the manual *.ecore approach by commenting out the "generate ..." clause from your Xtext grammars. This forces/allows you to define the *.ecore yourself which should enable you to identify a single *.ecore that is a superset of the requirements of each *.xtext. I don't think you will need to change the *.mwe2 script at all, for the first *.xtext, but you will probably need to adjust the paths so that the one *.ecore is shared by its many consumers.

Note that migrating from the autogenerated *.ecore structure to the manual *.ecore structure has a few gotchas even for EMF experts. I think the Bugzilla suggesting a refactoring wizard is outstanding. You should study a working manual *.ecore example to see what is necessary. If necessary look at the OCL grammars and build scripts.

Regards

Ed Willink

Re: Multiple Xtext files and Same Ecore [message #1852082 is a reply to message #1852078]

Thu, 28 April 2022 09:29

Eclipse User

455 [main] INFO text.xtext.generator.XtextGenerator - Generating org.xtext.example.mydsl.MyDsl8
1172 [main] INFO text.xtext.generator.XtextGenerator - Generating org.xtext.example.mydsl.MyDsl8

i see

// automatically generated by Xtext
grammar org.xtext.example.mydsl.MyDsl8 with org.eclipse.xtext.common.Terminals

and

// automatically generated by Xtext
grammar org.xtext.example.mydsl.MyDsl8 with org.eclipse.xtext.common.Terminals

so name is the same

Re: Multiple Xtext files and Same Ecore [message #1852106 is a reply to message #1852082]

Fri, 29 April 2022 07:41

Eclipse User

Hi,

Thank you a lot! I thought that you mean the name on the mwe2 file. Sorry for this.

The thing is that I changed this, and now I see in the log the language is generated. However, the second language with file extension = mydsl9 is not working. It is very weird because when I create a file with this extension the Eclipse does not give me the option to put the "Xtext nature", so I have to put this manually. Any idea why this might be?

If you will like to take a look, please find attached a minimal example. The plugins folder has the Xtext grammar and the Ecore, and the runtime has an example project.

Thanks again!

Kind regards,
Antonio

Attachment: multiple-grammar.zip
(Size: 1.92MB, Downloaded 136 times)

Re: Multiple Xtext files and Same Ecore [message #1852117 is a reply to message #1852106]

Fri, 29 April 2022 14:40

Eclipse User

Hi

Be very very careful about copying Xtext examples. The magic Xtext index remembers things and you can have the magic behaviour that you starting executing new/my.mwe2 which finds an internal name to look up and so can continue by executing old/my.mwe2.
I couldn't believe this once I discovered it, but it explained a lot and now I always do whatever I can to avoid the Xtext index.

Bottom line, when copying, change absolutely everything, and close and at least temporarily delete the original to ensure that it cannot be helpfully / very confusingly re-used.

Regards

Ed Willink

Re: Multiple Xtext files and Same Ecore [message #1852121 is a reply to message #1852117]

Sat, 30 April 2022 01:29

Eclipse User

it looks like you did not merge plugin.xml_gen to plugin.xml

Re: Multiple Xtext files and Same Ecore [message #1852124 is a reply to message #1852121]

Sat, 30 April 2022 09:03

Eclipse User

Hi,

Thank you both! Indeed @Cristian I did not merge the plugin.xml_gen to plugin.xml. After doing this it works perfectly.

Thanks again!

Kind regards,
Antonio

Previous Topic:	NullPointerException in Xtext IDE project after removing generate model statement from grammar
Next Topic:	Xtext 2.27.0.M2 is out

Goto Forum:

-=] Back to Top [=-

Current Time: Sun Jul 20 18:34:54 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter