Xcore is a textual format to define ecore models. This not only makes editing and reading much more convenient but has other cool advantages as well. Xcore, for instance, allows to embed Xbase expressions to define logic within EOperations and the like. In this session you will learn, why and when using Xcore is a good idea and how to use it with Xtext languages. I will explain talk about which URIs to use, and how to properly configure the MWE2 file as well as more complicated setups, with multiple languages and mixtures of ecore, xcore and generated models.

1. modelsUsing
with
Holger Schill

2. Generated model

3. Generated model

4. Generated model

5. You will come to the point…
Where you want to take control…

6. Problem
grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"
Model:
elements+=AbstractElement*;
AbstractElement:
Element | SecondElement | ThirdElement
;
Element:
'Element' name=ID ref=[AbstractElement]
;
SecondElement:
'SecondElement' name=ID
;
ThirdElement:
'ThirdElement' name=ID
;
Example

7. Problem
grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"
Model:
elements+=AbstractElement*;
AbstractElement:
Element | SecondElement | ThirdElement
;
Element:
'Element' name=ID ref=[AbstractElement]
;
SecondElement:
'SecondElement' name=ID
;
ThirdElement:
'ThirdElement' name=ID
;
Example

8. grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"
Model:
elements+=AbstractElement*;
AbstractElement:
Element | SecondElement | ThirdElement
;
Element:
'Element' name=ID ref=[Referenceable]
;
SecondElement:
'SecondElement' name=ID
;
ThirdElement:
'ThirdElement' name=ID
;
Referenceable:
SecondElement | ThirdElement
;
Never invoked by the parser
Example
Fake Rules to influence EMF Generator

9. For rapid prototyping the generated model is fine
When to stay with the generated model

10. For rapid prototyping the generated model is fine
Automatic synchronisation from grammar to model
When to stay with the generated model

11. For rapid prototyping the generated model is fine
Automatic synchronisation from grammar to model
If you do not need to introduce fake rules
When to stay with the generated model

12. But what if…
DSL DSL DSL
Order for generating DSLs is important

13. But what if…
DSL DSL DSL
Order for generating DSLs is important
Eagerly loaded

14. DSL DSL
DSLs reference each other
But what if…

15. Imported Model

16. Imported Model

17. Imported Model
Xtext Nature !

18. Still that tree editor…

19. Still that tree editor…
Merging can be difficult

20. Generation Gap Pattern…

21. What is Xcore?

22. The MyDSL example in Xcore

23. Derives ecore and genmodel

24. Put code directly in the model

25. Put code directly in the model

26. Load Xcore file
No Registration needed
Workflow configuration

27. Don’t forget the Xcore dependency

28. Don’t forget the Xcore dependency
Caused by: org.xml.sax.SAXParseExceptionpublicId: platform:/resource/org.xtext.example.mydsl.model/model/MyDsl.xcore; systemId:
platform:/resource/org.xtext.example.mydsl.model/model/MyDsl.xcore; lineNumber: 1; columnNumber: 1; Content is not allowed in
prolog.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:441)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1436)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:999)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:
510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
Invokes XcoreStandaloneSetup to register *.xcore

29. There is a wizard for that…

30. More complex setups
Ecore
model
Xcore
model
Xtext DSL
Xcore imports another ecore model
Xtext DSL imports Xcore

31. Ecore
model
Xcore
model

32. Ecore
model
Xcore
model
Xtext DSL

33. Caused by: java.lang.IllegalStateException: Problem parsing 'classpath:/org/xtext/example/
mydsl/MyDsl.xtext':
TransformationDiagnostic: null:9 Cannot find compatible feature name in sealed EClass
Greeting from imported package http://www.xtext.org/example/mydsl/MyDsl: The type 'Greeting'
does not have a feature 'name'. (ErrorCode: CannotCreateTypeInSealedMetamodel)
at org.eclipse.xtext.generator.LanguageConfig.setUri(LanguageConfig.java:247)
... 42 more
You will face that Exception

34. Caused by: java.lang.IllegalStateException: Problem parsing 'classpath:/org/xtext/example/
mydsl/MyDsl.xtext':
TransformationDiagnostic: null:9 Cannot find compatible feature name in sealed EClass
Greeting from imported package http://www.xtext.org/example/mydsl/MyDsl: The type 'Greeting'
does not have a feature 'name'. (ErrorCode: CannotCreateTypeInSealedMetamodel)
at org.eclipse.xtext.generator.LanguageConfig.setUri(LanguageConfig.java:247)
... 42 more
You will face that Exception
Ecore
model
Xcore
model
Proxy not resolvable
Index is not aware of genmodel
that the Xcore model links against
Proxy

35. But I added that stuff in the StandaloneSetup…?

36. But I added that stuff in the StandaloneSetup…?
ResourceSet
Resource
Resource
Resource
Resource
ResourceSet
Resource
Resource

37. Ecore
model
Xcore
model
Proxy
What’s happening?
ResourceSet
Grammar
Xcore resource
Ecore model
Genmodel
Index
ResourceDescription
ResourceDescription
ResourceDescription
ResourceDescription

38. Ecore
model
Xcore
model
Proxy
What’s happening?
Name
Index
ResourceDescription
ResourceDescription
ResourceDescription
ResourceDescription

39. Ecore
model
Xcore
model
Proxy
What’s happening?
URI
Index
ResourceDescription
ResourceDescription
ResourceDescription
ResourceDescription

40. Ecore
model
Xcore
model
What’s happening?
resolved
Index
ResourceDescription
ResourceDescription
ResourceDescription
ResourceDescription

41. Force same ResourceSet

42. More elegant

43. More complex example
Xtext DSL Xtext DSL
Languages referencing each other

44. More complex example
Xtext DSL Xtext DSL
Languages referencing each other
Plugin
Xtext
DSL 1
Plugin
Xtext
DSL 1
Problem
Circular dependency
Buddypolicy

45. Introduce a Ecore model as a protocol
Xtext DSL Xtext DSL
Ecore
model
Generated
Model
Generated
Model

46. grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"
import "http://www.xtext.org/common/model" as common
PackageDeclaration returns common::PackageDeclaration:
'package' name=FQN
content+=Element
;
Element returns common::NamedElement:
{Element}
'element' name=ID '{'
ref=[common::Referenceable | FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
Introduce a Ecore model as a protocol

47. grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"
import "http://www.xtext.org/common/model" as common
PackageDeclaration returns common::PackageDeclaration:
'package' name=FQN
content+=Element
;
Element returns common::NamedElement:
{Element}
'element' name=ID '{'
ref=[common::Referenceable | FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
Introduce a Ecore model as a protocol

48. More complex example
Xtext DSL Xtext DSL
Xcore
model
Xcore
model
Imported
Model
Imported
Model

49. More complex example
Xtext DSL Xtext DSL
Xcore
model
Xcore
model
Imported
Model
Imported
Model
Same Plugin

50. More complex example
Xtext DSL Xtext DSL
Xcore
model
Xcore
model
Imported
Model
Imported
Model
Different plugins

51. More complex example
Xtext DSL Xtext DSL
Ecore
model
Xcore
model
Xcore
model
Imported
Model
Imported
Model

52. Ecore
model
Xcore
model
Xcore
model

53. grammar org.xtext.example.firstdsl.Lang with org.eclipse.xtext.common.Terminals
import "org.xtext.example.myfirstdsl"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "http://www.xtext.org/common/model" as common
import "org.xtext.example.myseconddsl" as second
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=FirstElement*
;
FirstElement :
'element' name=ID '{'
ref=[second::SecondElement| FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
A lot of imports…

54. grammar org.xtext.example.firstdsl.Lang with org.eclipse.xtext.common.Terminals
import "org.xtext.example.myfirstdsl"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "http://www.xtext.org/common/model" as common
import "org.xtext.example.myseconddsl" as second
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=FirstElement*
;
FirstElement :
'element' name=ID '{'
ref=[second::SecondElement| FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
Have same root node…

55. grammar org.xtext.example.firstdsl.Lang with org.eclipse.xtext.common.Terminals
import "org.xtext.example.myfirstdsl"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "http://www.xtext.org/common/model" as common
import "org.xtext.example.myseconddsl" as second
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=FirstElement*
;
FirstElement :
'element' name=ID '{'
ref=[second::SecondElement| FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
Use implicitly imported classifier

56. MWE2 configuration
Same for both languages

57. grammar org.xtext.example.firstdsl.Lang with org.eclipse.xtext.common.Terminals
import "org.xtext.example.myfirstdsl"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "http://www.xtext.org/common/model" as common
import "org.xtext.example.myseconddsl" as second
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=FirstElement*
;
FirstElement :
'element' name=ID '{'
ref=[second::SecondElement| FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
But there is a small problem

58. grammar org.xtext.example.firstdsl.Lang with org.eclipse.xtext.common.Terminals
import "org.xtext.example.myfirstdsl"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "http://www.xtext.org/common/model" as common
import "org.xtext.example.myseconddsl" as second
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=FirstElement*
;
FirstElement :
'element' name=ID '{'
ref=[second::SecondElement| FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
CA is showing both elements?

59. grammar org.xtext.example.firstdsl.Lang with org.eclipse.xtext.common.Terminals
import "org.xtext.example.myfirstdsl"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "http://www.xtext.org/common/model" as common
import "org.xtext.example.myseconddsl" as second
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=FirstElement*
;
FirstElement :
'element' name=ID '{'
ref=[second::SecondElement| FQN]?
'}'
;
FQN:
ID ('.' ID)*
;
CA is showing both elements?

60. Xtext DSL Xtext DSL
Ecore
model
Xcore
model
Xcore
model
generated
Model
generated
Model
One way to solve that…

61. One way to solve that…

62. One way to solve that…
grammar org.xtext.example.seconddsl.Lang with org.eclipse.xtext.common.Terminals
generate generatedSecondModel "http://www.xtext.org/generatedSecondModel"
import "org.xtext.example.myseconddsl"
import "http://www.xtext.org/common/model" as common
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "org.xtext.example.myfirstdsl" as first
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=SecondElement*
;
SecondElement returns SecondElement:
{CustomSecondElement}
'element' name=ID '{'
ref=[first::FirstElement | FQN]?
'}'
;
FQN:
ID ('.' ID)*
;

63. One way to solve that…
grammar org.xtext.example.seconddsl.Lang with org.eclipse.xtext.common.Terminals
generate generatedSecondModel "http://www.xtext.org/generatedSecondModel"
import "org.xtext.example.myseconddsl"
import "http://www.xtext.org/common/model" as common
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "org.xtext.example.myfirstdsl" as first
PackageDeclaration returns common::PackageDeclaration :
'package' name=FQN
content+=SecondElement*
;
SecondElement returns SecondElement:
{CustomSecondElement}
'element' name=ID '{'
ref=[first::FirstElement | FQN]?
'}'
;
FQN:
ID ('.' ID)*
;

64. But when I run it….
[ERROR]: GeneratorException: (Element: -UNKNOWN-; Reported by: Generator)
java.lang.RuntimeException: Could not find a GenModel for EPackage 'http://www.xtext.org/
generatedSecondModel' from http://www.xtext.org/generatedSecondModel
If the missing GenModel has been generated via EMFGeneratorFragment or EcoreGeneratorFragment make
sure to run it first in the workflow.
If you have a *.genmodel-file, make sure to register it via
StandaloneSetup.registerGenModelFile(String)
at org.eclipse.xtext.generator.GenModelAccess.getGenModelResource(GenModelAccess.java:137)
at org.eclipse.xtext.generator.GenModelAccess.getGenPackage(GenModelAccess.java:85)

65. But when I run it….
// generates Java API for the generated EPackages
fragment = ecore.EMFGeneratorFragment auto-inject {}
Don’t forget the EMFGeneratorFragment
[ERROR]: GeneratorException: (Element: -UNKNOWN-; Reported by: Generator)
java.lang.RuntimeException: Could not find a GenModel for EPackage 'http://www.xtext.org/
generatedSecondModel' from http://www.xtext.org/generatedSecondModel
If the missing GenModel has been generated via EMFGeneratorFragment or EcoreGeneratorFragment make
sure to run it first in the workflow.
If you have a *.genmodel-file, make sure to register it via
StandaloneSetup.registerGenModelFile(String)
at org.eclipse.xtext.generator.GenModelAccess.getGenModelResource(GenModelAccess.java:137)
at org.eclipse.xtext.generator.GenModelAccess.getGenPackage(GenModelAccess.java:85)

66. There was nothing about Xbase so far…

67. Using Xbase

68. Wizard does crazy things…// automatically generated by Xtext
grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
import "http://www.xtext.org/example/xbase"
import "http://www.eclipse.org/xtext/common/JavaVMTypes" as types
import "http://www.eclipse.org/xtext/xbase/Xbase" as xbase
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
MyClass returns MyClass:
{MyClass}
'MyClass'
'{'
('ref' ref=JvmTypeReference)?
('body' body=XBlockExpression)?
'}';
JvmTypeReference returns types::JvmTypeReference:
JvmParameterizedTypeReference_Impl | JvmGenericArrayTypeReference | JvmWildcardTypeReference | JvmAnyTypeReference | JvmMultiTypeReference | JvmDelegateTypeReference | JvmSynonymTypeReference | JvmUnknownTypeReference | JvmInnerTypeReference;
XExpression returns xbase::XExpression:
XIfExpression | XSwitchExpression | XBlockExpression | XVariableDeclaration | XMemberFeatureCall | XFeatureCall | XConstructorCall | XBooleanLiteral | XNullLiteral | XNumberLiteral | XStringLiteral | XListLiteral | XSetLiteral | XClosure | XCastedExpression | XBinaryOperation | XUnaryOperation | XPostfixOperation | XForLoopExpression | XBasicForLoopExpression | XDoWhileExpression | XWhileExpression | XTypeLiteral | XInstanceOfExpression | XThrowExpression | XTryCatchFinallyExpression | XAssignment | XReturnExpression | XSynchronizedExpression;
JvmType returns types::JvmType:
JvmVoid | JvmPrimitiveType | JvmArrayType | JvmTypeParameter | JvmAnnotationType | JvmEnumerationType | JvmGenericType;
JvmTypeConstraint returns types::JvmTypeConstraint:
JvmUpperBound | JvmLowerBound;
JvmParameterizedTypeReference returns types::JvmParameterizedTypeReference:
JvmParameterizedTypeReference_Impl | JvmInnerTypeReference;
JvmMember returns types::JvmMember:
JvmAnnotationType | JvmEnumerationType | JvmEnumerationLiteral | JvmGenericType | JvmField_Impl | JvmConstructor | JvmOperation;
JvmAnnotationValue returns types::JvmAnnotationValue:
JvmIntAnnotationValue | JvmBooleanAnnotationValue | JvmByteAnnotationValue | JvmShortAnnotationValue | JvmLongAnnotationValue | JvmDoubleAnnotationValue | JvmFloatAnnotationValue | JvmCharAnnotationValue | JvmStringAnnotationValue | JvmTypeAnnotationValue | JvmAnnotationAnnotationValue | JvmEnumAnnotationValue | JvmCustomAnnotationValue;
JvmIdentifiableElement returns types::JvmIdentifiableElement:
JvmVoid | JvmPrimitiveType | JvmArrayType | JvmTypeParameter | JvmAnnotationType | JvmEnumerationType | JvmEnumerationLiteral | JvmGenericType | JvmField_Impl | JvmConstructor | JvmOperation | JvmFormalParameter;
XBlockExpression returns xbase::XBlockExpression:
{xbase::XBlockExpression}
'XBlockExpression'
'{'
('expressions' '{' expressions+=XExpression ( "," expressions+=XExpression)* '}' )?
'}';
JvmParameterizedTypeReference_Impl returns types::JvmParameterizedTypeReference:
{types::JvmParameterizedTypeReference}
'JvmParameterizedTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('arguments' '{' arguments+=JvmTypeReference ( "," arguments+=JvmTypeReference)* '}' )?
'}';
JvmGenericArrayTypeReference returns types::JvmGenericArrayTypeReference:
{types::JvmGenericArrayTypeReference}
'JvmGenericArrayTypeReference'
'{'
('componentType' componentType=JvmTypeReference)?
'}';
JvmWildcardTypeReference returns types::JvmWildcardTypeReference:
{types::JvmWildcardTypeReference}
'JvmWildcardTypeReference'
'{'
('constraints' '{' constraints+=JvmTypeConstraint ( "," constraints+=JvmTypeConstraint)* '}' )?
'}';
JvmAnyTypeReference returns types::JvmAnyTypeReference:
{types::JvmAnyTypeReference}
'JvmAnyTypeReference'
'{'
('type' type=[types::JvmType|EString])?
'}';
JvmMultiTypeReference returns types::JvmMultiTypeReference:
{types::JvmMultiTypeReference}
'JvmMultiTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('references' '{' references+=JvmTypeReference ( "," references+=JvmTypeReference)* '}' )?
'}';
JvmDelegateTypeReference returns types::JvmDelegateTypeReference:
{types::JvmDelegateTypeReference}
'JvmDelegateTypeReference'
'{'
('delegate' delegate=[types::JvmTypeReference|EString])?
'}';
JvmSynonymTypeReference returns types::JvmSynonymTypeReference:
{types::JvmSynonymTypeReference}
'JvmSynonymTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('references' '{' references+=JvmTypeReference ( "," references+=JvmTypeReference)* '}' )?
'}';
JvmUnknownTypeReference returns types::JvmUnknownTypeReference:
{types::JvmUnknownTypeReference}
'JvmUnknownTypeReference'
;
JvmInnerTypeReference returns types::JvmInnerTypeReference:
{types::JvmInnerTypeReference}
'JvmInnerTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('arguments' '{' arguments+=JvmTypeReference ( "," arguments+=JvmTypeReference)* '}' )?
('outer' outer=JvmParameterizedTypeReference)?
'}';
JvmVoid returns types::JvmVoid:
{types::JvmVoid}
'JvmVoid'
;
JvmPrimitiveType returns types::JvmPrimitiveType:
{types::JvmPrimitiveType}
'JvmPrimitiveType'
'{'
('simpleName' simpleName=EString)?
('arrayType' arrayType=JvmArrayType)?
'}';
JvmArrayType returns types::JvmArrayType:
{types::JvmArrayType}
'JvmArrayType'
'{'
('arrayType' arrayType=JvmArrayType)?
'}';
JvmTypeParameter returns types::JvmTypeParameter:
{types::JvmTypeParameter}
'JvmTypeParameter'
name=EString
'{'
('arrayType' arrayType=JvmArrayType)?
('constraints' '{' constraints+=JvmTypeConstraint ( "," constraints+=JvmTypeConstraint)* '}' )?
'}';
JvmAnnotationType returns types::JvmAnnotationType:
{types::JvmAnnotationType}
(deprecated?='deprecated')?
(abstract?='abstract')?
(static?='static')?
(final?='final')?
'JvmAnnotationType'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('packageName' packageName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('arrayType' arrayType=JvmArrayType)?
('superTypes' '{' superTypes+=JvmTypeReference ( "," superTypes+=JvmTypeReference)* '}' )?
('members' '{' members+=JvmMember ( "," members+=JvmMember)* '}' )?
'}';
JvmEnumerationType returns types::JvmEnumerationType:
{types::JvmEnumerationType}
(deprecated?='deprecated')?
(abstract?='abstract')?
(static?='static')?
(final?='final')?
'JvmEnumerationType'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('packageName' packageName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('arrayType' arrayType=JvmArrayType)?
('superTypes' '{' superTypes+=JvmTypeReference ( "," superTypes+=JvmTypeReference)* '}' )?
('members' '{' members+=JvmMember ( "," members+=JvmMember)* '}' )?
'}';
JvmGenericType returns types::JvmGenericType:
{types::JvmGenericType}
(deprecated?='deprecated')?
(abstract?='abstract')?
(static?='static')?
(final?='final')?
(interface?='interface')?
(strictFloatingPoint?='strictFloatingPoint')?
(anonymous?='anonymous')?
'JvmGenericType'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('packageName' packageName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('arrayType' arrayType=JvmArrayType)?
('superTypes' '{' superTypes+=JvmTypeReference ( "," superTypes+=JvmTypeReference)* '}' )?
('members' '{' members+=JvmMember ( "," members+=JvmMember)* '}' )?
('typeParameters' '{' typeParameters+=JvmTypeParameter ( "," typeParameters+=JvmTypeParameter)* '}' )?
'}';
EString returns ecore::EString:
STRING | ID;
JvmAnnotationReference returns types::JvmAnnotationReference:
{types::JvmAnnotationReference}
'JvmAnnotationReference'
'{'
('annotation' annotation=[types::JvmAnnotationType|EString])?
('explicitValues' '{' explicitValues+=JvmAnnotationValue ( "," explicitValues+=JvmAnnotationValue)* '}' )?
'}';
enum JvmVisibility returns types::JvmVisibility:
DEFAULT = 'DEFAULT' | PRIVATE = 'PRIVATE' | PROTECTED = 'PROTECTED' | PUBLIC = 'PUBLIC';
EBoolean returns ecore::EBoolean:
'true' | 'false';
JvmOperation returns types::JvmOperation:
{types::JvmOperation}
(deprecated?='deprecated')?
(varArgs?='varArgs')?
(static?='static')?
(final?='final')?
(abstract?='abstract')?
(synchronized?='synchronized')?
(default?='default')?
(native?='native')?
(strictFloatingPoint?='strictFloatingPoint')?
'JvmOperation'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('typeParameters' '{' typeParameters+=JvmTypeParameter ( "," typeParameters+=JvmTypeParameter)* '}' )?
('parameters' '{' parameters+=JvmFormalParameter ( "," parameters+=JvmFormalParameter)* '}' )?
('exceptions' '{' exceptions+=JvmTypeReference ( "," exceptions+=JvmTypeReference)* '}' )?
('returnType' returnType=JvmTypeReference)?
('defaultValue' defaultValue=JvmAnnotationValue)?
'}';
JvmIntAnnotationValue returns types::JvmIntAnnotationValue:
{types::JvmIntAnnotationValue}
'JvmIntAnnotationValue'
'{'
('values' '{' values+=EInt ( "," values+=EInt)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmBooleanAnnotationValue returns types::JvmBooleanAnnotationValue:
{types::JvmBooleanAnnotationValue}
'JvmBooleanAnnotationValue'
'{'
('values' '{' values+=EBoolean ( "," values+=EBoolean)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmByteAnnotationValue returns types::JvmByteAnnotationValue:
{types::JvmByteAnnotationValue}
'JvmByteAnnotationValue'
'{'
('values' '{' values+=EByte ( "," values+=EByte)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmShortAnnotationValue returns types::JvmShortAnnotationValue:
{types::JvmShortAnnotationValue}
'JvmShortAnnotationValue'
'{'
('values' '{' values+=EShort ( "," values+=EShort)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmLongAnnotationValue returns types::JvmLongAnnotationValue:
{types::JvmLongAnnotationValue}
'JvmLongAnnotationValue'
'{'
('values' '{' values+=ELong ( "," values+=ELong)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmDoubleAnnotationValue returns types::JvmDoubleAnnotationValue:
{types::JvmDoubleAnnotationValue}
'JvmDoubleAnnotationValue'
'{'
('values' '{' values+=EDouble ( "," values+=EDouble)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmFloatAnnotationValue returns types::JvmFloatAnnotationValue:
{types::JvmFloatAnnotationValue}
'JvmFloatAnnotationValue'
'{'
('values' '{' values+=EFloat ( "," values+=EFloat)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmCharAnnotationValue returns types::JvmCharAnnotationValue:
{types::JvmCharAnnotationValue}
'JvmCharAnnotationValue'
'{'
('values' '{' values+=EChar ( "," values+=EChar)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmStringAnnotationValue returns types::JvmStringAnnotationValue:
{types::JvmStringAnnotationValue}
'JvmStringAnnotationValue'
'{'
('values' '{' values+=EString ( "," values+=EString)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmTypeAnnotationValue returns types::JvmTypeAnnotationValue:
{types::JvmTypeAnnotationValue}
'JvmTypeAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '{' values+=JvmTypeReference ( "," values+=JvmTypeReference)* '}' )?
'}';
JvmAnnotationAnnotationValue returns types::JvmAnnotationAnnotationValue:
{types::JvmAnnotationAnnotationValue}
'JvmAnnotationAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '{' values+=JvmAnnotationReference ( "," values+=JvmAnnotationReference)* '}' )?
'}';
JvmEnumAnnotationValue returns types::JvmEnumAnnotationValue:
{types::JvmEnumAnnotationValue}
'JvmEnumAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '(' values+=[types::JvmEnumerationLiteral|EString] ( "," values+=[types::JvmEnumerationLiteral|EString])* ')' )?
'}';
JvmCustomAnnotationValue returns types::JvmCustomAnnotationValue:
{types::JvmCustomAnnotationValue}
'JvmCustomAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '(' values+=[ecore::EObject|EString] ( "," values+=[ecore::EObject|EString])* ')' )?
'}';
JvmFormalParameter returns types::JvmFormalParameter:
{types::JvmFormalParameter}
'JvmFormalParameter'
name=EString
'{'
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('parameterType' parameterType=JvmTypeReference)?
'}';
EInt returns ecore::EInt:
'-'? INT;
EByte returns ecore::EByte:
'-'? INT;
EShort returns ecore::EShort:
'-'? INT;
ELong returns ecore::ELong:
'-'? INT;
EDouble returns ecore::EDouble:
'-'? INT? '.' INT (('E'|'e') '-'? INT)?;
EFloat returns ecore::EFloat:
'-'? INT? '.' INT (('E'|'e') '-'? INT)?;
EChar returns ecore::EChar:
'-'? INT;
JvmEnumerationLiteral returns types::JvmEnumerationLiteral:
{types::JvmEnumerationLiteral}
(deprecated?='deprecated')?
(static?='static')?
(final?='final')?
(volatile?='volatile')?
(transient?='transient')?
(constant?='constant')?
'JvmEnumerationLiteral'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('constantValue' constantValue=EJavaObject)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('type' type=JvmTypeReference)?
'}';
EJavaObject returns ecore::EJavaObject:
'EJavaObject' /* TODO: implement this rule and an appropriate IValueConverter */;
EObject returns ecore::EObject:
{ecore::EObject}
'EObject'
;
JvmField_Impl returns types::JvmField:
{types::JvmField}
(deprecated?='deprecated')?
(static?='static')?
(final?='final')?
(volatile?='volatile')?
(transient?='transient')?
(constant?='constant')?
'JvmField'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('constantValue' constantValue=EJavaObject)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('type' type=JvmTypeReference)?
'}';
JvmConstructor returns types::JvmConstructor:
{types::JvmConstructor}
(deprecated?='deprecated')?
(varArgs?='varArgs')?
'JvmConstructor'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('typeParameters' '{' typeParameters+=JvmTypeParameter ( "," typeParameters+=JvmTypeParameter)* '}' )?
('parameters' '{' parameters+=JvmFormalParameter ( "," parameters+=JvmFormalParameter)* '}' )?
('exceptions' '{' exceptions+=JvmTypeReference ( "," exceptions+=JvmTypeReference)* '}' )?
'}';
JvmUpperBound returns types::JvmUpperBound:
{types::JvmUpperBound}
'JvmUpperBound'
'{'
('typeReference' typeReference=JvmTypeReference)?
'}';
JvmLowerBound returns types::JvmLowerBound:
{types::JvmLowerBound}
'JvmLowerBound'
'{'
('typeReference' typeReference=JvmTypeReference)?
'}';
XIfExpression returns xbase::XIfExpression:
{xbase::XIfExpression}
'XIfExpression'
'{'
('if' if=XExpression)?
('then' then=XExpression)?
('else' else=XExpression)?
'}';
XSwitchExpression returns xbase::XSwitchExpression:
{xbase::XSwitchExpression}
'XSwitchExpression'
'{'
('switch' switch=XExpression)?
('cases' '{' cases+=XCasePart ( "," cases+=XCasePart)* '}' )?
('default' default=XExpression)?
('declaredParam' declaredParam=JvmFormalParameter)?
'}';
XVariableDeclaration returns xbase::XVariableDeclaration:
{xbase::XVariableDeclaration}
(writeable?='writeable')?
'XVariableDeclaration'
name=EString
'{'
('type' type=JvmTypeReference)?
('right' right=XExpression)?
'}';
XMemberFeatureCall returns xbase::XMemberFeatureCall:
{xbase::XMemberFeatureCall}
(explicitOperationCall?='explicitOperationCall')?
(explicitStatic?='explicitStatic')?
(nullSafe?='nullSafe')?
'XMemberFeatureCall'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('memberCallTarget' memberCallTarget=XExpression)?
('memberCallArguments' '{' memberCallArguments+=XExpression ( "," memberCallArguments+=XExpression)* '}' )?
'}';
XFeatureCall returns xbase::XFeatureCall:
{xbase::XFeatureCall}
(explicitOperationCall?='explicitOperationCall')?
'XFeatureCall'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('featureCallArguments' '{' featureCallArguments+=XExpression ( "," featureCallArguments+=XExpression)* '}' )?
'}';
XConstructorCall returns xbase::XConstructorCall:
{xbase::XConstructorCall}
(explicitConstructorCall?='explicitConstructorCall')?
'XConstructorCall'
'{'
('constructor' constructor=[types::JvmConstructor|EString])?
('arguments' '{' arguments+=XExpression ( "," arguments+=XExpression)* '}' )?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
'}';
XBooleanLiteral returns xbase::XBooleanLiteral:
{xbase::XBooleanLiteral}
(isTrue?='isTrue')?
'XBooleanLiteral'
;
XNullLiteral returns xbase::XNullLiteral:
{xbase::XNullLiteral}
'XNullLiteral'
;
XNumberLiteral returns xbase::XNumberLiteral:
{xbase::XNumberLiteral}
'XNumberLiteral'
'{'
('value' value=EString)?
'}';
XStringLiteral returns xbase::XStringLiteral:
{xbase::XStringLiteral}
'XStringLiteral'
'{'
('value' value=EString)?
'}';
XListLiteral returns xbase::XListLiteral:
{xbase::XListLiteral}
'XListLiteral'
'{'
('elements' '{' elements+=XExpression ( "," elements+=XExpression)* '}' )?
'}';
XSetLiteral returns xbase::XSetLiteral:
{xbase::XSetLiteral}
'XSetLiteral'
'{'
('elements' '{' elements+=XExpression ( "," elements+=XExpression)* '}' )?
'}';
XClosure returns xbase::XClosure:
{xbase::XClosure}
(explicitSyntax?='explicitSyntax')?
'XClosure'
'{'
('declaredFormalParameters' '{' declaredFormalParameters+=JvmFormalParameter ( "," declaredFormalParameters+=JvmFormalParameter)* '}' )?
('expression' expression=XExpression)?
'}';
XCastedExpression returns xbase::XCastedExpression:
{xbase::XCastedExpression}
'XCastedExpression'
'{'
('type' type=JvmTypeReference)?
('target' target=XExpression)?
'}';
XBinaryOperation returns xbase::XBinaryOperation:
{xbase::XBinaryOperation}
(reassignFirstArgument?='reassignFirstArgument')?
'XBinaryOperation'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('leftOperand' leftOperand=XExpression)?
('rightOperand' rightOperand=XExpression)?
'}';
XUnaryOperation returns xbase::XUnaryOperation:
{xbase::XUnaryOperation}
'XUnaryOperation'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('operand' operand=XExpression)?
'}';
XPostfixOperation returns xbase::XPostfixOperation:
{xbase::XPostfixOperation}
'XPostfixOperation'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('operand' operand=XExpression)?
'}';
XForLoopExpression returns xbase::XForLoopExpression:
{xbase::XForLoopExpression}
'XForLoopExpression'
'{'
('forExpression' forExpression=XExpression)?
('eachExpression' eachExpression=XExpression)?
('declaredParam' declaredParam=JvmFormalParameter)?
'}';
XBasicForLoopExpression returns xbase::XBasicForLoopExpression:
{xbase::XBasicForLoopExpression}
'XBasicForLoopExpression'
'{'
('expression' expression=XExpression)?
('eachExpression' eachExpression=XExpression)?
('initExpressions' '{' initExpressions+=XExpression ( "," initExpressions+=XExpression)* '}' )?
('updateExpressions' '{' updateExpressions+=XExpression ( "," updateExpressions+=XExpression)* '}' )?
'}';
XDoWhileExpression returns xbase::XDoWhileExpression:
{xbase::XDoWhileExpression}
'XDoWhileExpression'
'{'
('predicate' predicate=XExpression)?
('body' body=XExpression)?
'}';
XWhileExpression returns xbase::XWhileExpression:
{xbase::XWhileExpression}
'XWhileExpression'
'{'
('predicate' predicate=XExpression)?
('body' body=XExpression)?
'}';
XTypeLiteral returns xbase::XTypeLiteral:
'XTypeLiteral'
'{'
('arrayDimensions' '{' arrayDimensions+=EString ( "," arrayDimensions+=EString)* '}' )?
'type' type=[types::JvmType|EString]
'}';
XInstanceOfExpression returns xbase::XInstanceOfExpression:
'XInstanceOfExpression'
'{'
'type' type=JvmTypeReference
'expression' expression=XExpression
'}';
XThrowExpression returns xbase::XThrowExpression:
{xbase::XThrowExpression}
'XThrowExpression'
'{'
('expression' expression=XExpression)?
'}';
XTryCatchFinallyExpression returns xbase::XTryCatchFinallyExpression:
{xbase::XTryCatchFinallyExpression}
'XTryCatchFinallyExpression'
'{'
('expression' expression=XExpression)?
('finallyExpression' finallyExpression=XExpression)?
('catchClauses' '{' catchClauses+=XCatchClause ( "," catchClauses+=XCatchClause)* '}' )?
'}';
XAssignment returns xbase::XAssignment:
{xbase::XAssignment}
(explicitStatic?='explicitStatic')?
'XAssignment'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('assignable' assignable=XExpression)?
('value' value=XExpression)?
'}';
Rebuilds Xbase grammar without reusing it…

69. Wizard does crazy things…// automatically generated by Xtext
grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
import "http://www.xtext.org/example/xbase"
import "http://www.eclipse.org/xtext/common/JavaVMTypes" as types
import "http://www.eclipse.org/xtext/xbase/Xbase" as xbase
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
MyClass returns MyClass:
{MyClass}
'MyClass'
'{'
('ref' ref=JvmTypeReference)?
('body' body=XBlockExpression)?
'}';
JvmTypeReference returns types::JvmTypeReference:
JvmParameterizedTypeReference_Impl | JvmGenericArrayTypeReference | JvmWildcardTypeReference | JvmAnyTypeReference | JvmMultiTypeReference | JvmDelegateTypeReference | JvmSynonymTypeReference | JvmUnknownTypeReference | JvmInnerTypeReference;
XExpression returns xbase::XExpression:
XIfExpression | XSwitchExpression | XBlockExpression | XVariableDeclaration | XMemberFeatureCall | XFeatureCall | XConstructorCall | XBooleanLiteral | XNullLiteral | XNumberLiteral | XStringLiteral | XListLiteral | XSetLiteral | XClosure | XCastedExpression | XBinaryOperation | XUnaryOperation | XPostfixOperation | XForLoopExpression | XBasicForLoopExpression | XDoWhileExpression | XWhileExpression | XTypeLiteral | XInstanceOfExpression | XThrowExpression | XTryCatchFinallyExpression | XAssignment | XReturnExpression | XSynchronizedExpression;
JvmType returns types::JvmType:
JvmVoid | JvmPrimitiveType | JvmArrayType | JvmTypeParameter | JvmAnnotationType | JvmEnumerationType | JvmGenericType;
JvmTypeConstraint returns types::JvmTypeConstraint:
JvmUpperBound | JvmLowerBound;
JvmParameterizedTypeReference returns types::JvmParameterizedTypeReference:
JvmParameterizedTypeReference_Impl | JvmInnerTypeReference;
JvmMember returns types::JvmMember:
JvmAnnotationType | JvmEnumerationType | JvmEnumerationLiteral | JvmGenericType | JvmField_Impl | JvmConstructor | JvmOperation;
JvmAnnotationValue returns types::JvmAnnotationValue:
JvmIntAnnotationValue | JvmBooleanAnnotationValue | JvmByteAnnotationValue | JvmShortAnnotationValue | JvmLongAnnotationValue | JvmDoubleAnnotationValue | JvmFloatAnnotationValue | JvmCharAnnotationValue | JvmStringAnnotationValue | JvmTypeAnnotationValue | JvmAnnotationAnnotationValue | JvmEnumAnnotationValue | JvmCustomAnnotationValue;
JvmIdentifiableElement returns types::JvmIdentifiableElement:
JvmVoid | JvmPrimitiveType | JvmArrayType | JvmTypeParameter | JvmAnnotationType | JvmEnumerationType | JvmEnumerationLiteral | JvmGenericType | JvmField_Impl | JvmConstructor | JvmOperation | JvmFormalParameter;
XBlockExpression returns xbase::XBlockExpression:
{xbase::XBlockExpression}
'XBlockExpression'
'{'
('expressions' '{' expressions+=XExpression ( "," expressions+=XExpression)* '}' )?
'}';
JvmParameterizedTypeReference_Impl returns types::JvmParameterizedTypeReference:
{types::JvmParameterizedTypeReference}
'JvmParameterizedTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('arguments' '{' arguments+=JvmTypeReference ( "," arguments+=JvmTypeReference)* '}' )?
'}';
JvmGenericArrayTypeReference returns types::JvmGenericArrayTypeReference:
{types::JvmGenericArrayTypeReference}
'JvmGenericArrayTypeReference'
'{'
('componentType' componentType=JvmTypeReference)?
'}';
JvmWildcardTypeReference returns types::JvmWildcardTypeReference:
{types::JvmWildcardTypeReference}
'JvmWildcardTypeReference'
'{'
('constraints' '{' constraints+=JvmTypeConstraint ( "," constraints+=JvmTypeConstraint)* '}' )?
'}';
JvmAnyTypeReference returns types::JvmAnyTypeReference:
{types::JvmAnyTypeReference}
'JvmAnyTypeReference'
'{'
('type' type=[types::JvmType|EString])?
'}';
JvmMultiTypeReference returns types::JvmMultiTypeReference:
{types::JvmMultiTypeReference}
'JvmMultiTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('references' '{' references+=JvmTypeReference ( "," references+=JvmTypeReference)* '}' )?
'}';
JvmDelegateTypeReference returns types::JvmDelegateTypeReference:
{types::JvmDelegateTypeReference}
'JvmDelegateTypeReference'
'{'
('delegate' delegate=[types::JvmTypeReference|EString])?
'}';
JvmSynonymTypeReference returns types::JvmSynonymTypeReference:
{types::JvmSynonymTypeReference}
'JvmSynonymTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('references' '{' references+=JvmTypeReference ( "," references+=JvmTypeReference)* '}' )?
'}';
JvmUnknownTypeReference returns types::JvmUnknownTypeReference:
{types::JvmUnknownTypeReference}
'JvmUnknownTypeReference'
;
JvmInnerTypeReference returns types::JvmInnerTypeReference:
{types::JvmInnerTypeReference}
'JvmInnerTypeReference'
'{'
('type' type=[types::JvmType|EString])?
('arguments' '{' arguments+=JvmTypeReference ( "," arguments+=JvmTypeReference)* '}' )?
('outer' outer=JvmParameterizedTypeReference)?
'}';
JvmVoid returns types::JvmVoid:
{types::JvmVoid}
'JvmVoid'
;
JvmPrimitiveType returns types::JvmPrimitiveType:
{types::JvmPrimitiveType}
'JvmPrimitiveType'
'{'
('simpleName' simpleName=EString)?
('arrayType' arrayType=JvmArrayType)?
'}';
JvmArrayType returns types::JvmArrayType:
{types::JvmArrayType}
'JvmArrayType'
'{'
('arrayType' arrayType=JvmArrayType)?
'}';
JvmTypeParameter returns types::JvmTypeParameter:
{types::JvmTypeParameter}
'JvmTypeParameter'
name=EString
'{'
('arrayType' arrayType=JvmArrayType)?
('constraints' '{' constraints+=JvmTypeConstraint ( "," constraints+=JvmTypeConstraint)* '}' )?
'}';
JvmAnnotationType returns types::JvmAnnotationType:
{types::JvmAnnotationType}
(deprecated?='deprecated')?
(abstract?='abstract')?
(static?='static')?
(final?='final')?
'JvmAnnotationType'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('packageName' packageName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('arrayType' arrayType=JvmArrayType)?
('superTypes' '{' superTypes+=JvmTypeReference ( "," superTypes+=JvmTypeReference)* '}' )?
('members' '{' members+=JvmMember ( "," members+=JvmMember)* '}' )?
'}';
JvmEnumerationType returns types::JvmEnumerationType:
{types::JvmEnumerationType}
(deprecated?='deprecated')?
(abstract?='abstract')?
(static?='static')?
(final?='final')?
'JvmEnumerationType'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('packageName' packageName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('arrayType' arrayType=JvmArrayType)?
('superTypes' '{' superTypes+=JvmTypeReference ( "," superTypes+=JvmTypeReference)* '}' )?
('members' '{' members+=JvmMember ( "," members+=JvmMember)* '}' )?
'}';
JvmGenericType returns types::JvmGenericType:
{types::JvmGenericType}
(deprecated?='deprecated')?
(abstract?='abstract')?
(static?='static')?
(final?='final')?
(interface?='interface')?
(strictFloatingPoint?='strictFloatingPoint')?
(anonymous?='anonymous')?
'JvmGenericType'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('packageName' packageName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('arrayType' arrayType=JvmArrayType)?
('superTypes' '{' superTypes+=JvmTypeReference ( "," superTypes+=JvmTypeReference)* '}' )?
('members' '{' members+=JvmMember ( "," members+=JvmMember)* '}' )?
('typeParameters' '{' typeParameters+=JvmTypeParameter ( "," typeParameters+=JvmTypeParameter)* '}' )?
'}';
EString returns ecore::EString:
STRING | ID;
JvmAnnotationReference returns types::JvmAnnotationReference:
{types::JvmAnnotationReference}
'JvmAnnotationReference'
'{'
('annotation' annotation=[types::JvmAnnotationType|EString])?
('explicitValues' '{' explicitValues+=JvmAnnotationValue ( "," explicitValues+=JvmAnnotationValue)* '}' )?
'}';
enum JvmVisibility returns types::JvmVisibility:
DEFAULT = 'DEFAULT' | PRIVATE = 'PRIVATE' | PROTECTED = 'PROTECTED' | PUBLIC = 'PUBLIC';
EBoolean returns ecore::EBoolean:
'true' | 'false';
JvmOperation returns types::JvmOperation:
{types::JvmOperation}
(deprecated?='deprecated')?
(varArgs?='varArgs')?
(static?='static')?
(final?='final')?
(abstract?='abstract')?
(synchronized?='synchronized')?
(default?='default')?
(native?='native')?
(strictFloatingPoint?='strictFloatingPoint')?
'JvmOperation'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('typeParameters' '{' typeParameters+=JvmTypeParameter ( "," typeParameters+=JvmTypeParameter)* '}' )?
('parameters' '{' parameters+=JvmFormalParameter ( "," parameters+=JvmFormalParameter)* '}' )?
('exceptions' '{' exceptions+=JvmTypeReference ( "," exceptions+=JvmTypeReference)* '}' )?
('returnType' returnType=JvmTypeReference)?
('defaultValue' defaultValue=JvmAnnotationValue)?
'}';
JvmIntAnnotationValue returns types::JvmIntAnnotationValue:
{types::JvmIntAnnotationValue}
'JvmIntAnnotationValue'
'{'
('values' '{' values+=EInt ( "," values+=EInt)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmBooleanAnnotationValue returns types::JvmBooleanAnnotationValue:
{types::JvmBooleanAnnotationValue}
'JvmBooleanAnnotationValue'
'{'
('values' '{' values+=EBoolean ( "," values+=EBoolean)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmByteAnnotationValue returns types::JvmByteAnnotationValue:
{types::JvmByteAnnotationValue}
'JvmByteAnnotationValue'
'{'
('values' '{' values+=EByte ( "," values+=EByte)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmShortAnnotationValue returns types::JvmShortAnnotationValue:
{types::JvmShortAnnotationValue}
'JvmShortAnnotationValue'
'{'
('values' '{' values+=EShort ( "," values+=EShort)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmLongAnnotationValue returns types::JvmLongAnnotationValue:
{types::JvmLongAnnotationValue}
'JvmLongAnnotationValue'
'{'
('values' '{' values+=ELong ( "," values+=ELong)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmDoubleAnnotationValue returns types::JvmDoubleAnnotationValue:
{types::JvmDoubleAnnotationValue}
'JvmDoubleAnnotationValue'
'{'
('values' '{' values+=EDouble ( "," values+=EDouble)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmFloatAnnotationValue returns types::JvmFloatAnnotationValue:
{types::JvmFloatAnnotationValue}
'JvmFloatAnnotationValue'
'{'
('values' '{' values+=EFloat ( "," values+=EFloat)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmCharAnnotationValue returns types::JvmCharAnnotationValue:
{types::JvmCharAnnotationValue}
'JvmCharAnnotationValue'
'{'
('values' '{' values+=EChar ( "," values+=EChar)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmStringAnnotationValue returns types::JvmStringAnnotationValue:
{types::JvmStringAnnotationValue}
'JvmStringAnnotationValue'
'{'
('values' '{' values+=EString ( "," values+=EString)* '}' )?
('operation' operation=[types::JvmOperation|EString])?
'}';
JvmTypeAnnotationValue returns types::JvmTypeAnnotationValue:
{types::JvmTypeAnnotationValue}
'JvmTypeAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '{' values+=JvmTypeReference ( "," values+=JvmTypeReference)* '}' )?
'}';
JvmAnnotationAnnotationValue returns types::JvmAnnotationAnnotationValue:
{types::JvmAnnotationAnnotationValue}
'JvmAnnotationAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '{' values+=JvmAnnotationReference ( "," values+=JvmAnnotationReference)* '}' )?
'}';
JvmEnumAnnotationValue returns types::JvmEnumAnnotationValue:
{types::JvmEnumAnnotationValue}
'JvmEnumAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '(' values+=[types::JvmEnumerationLiteral|EString] ( "," values+=[types::JvmEnumerationLiteral|EString])* ')' )?
'}';
JvmCustomAnnotationValue returns types::JvmCustomAnnotationValue:
{types::JvmCustomAnnotationValue}
'JvmCustomAnnotationValue'
'{'
('operation' operation=[types::JvmOperation|EString])?
('values' '(' values+=[ecore::EObject|EString] ( "," values+=[ecore::EObject|EString])* ')' )?
'}';
JvmFormalParameter returns types::JvmFormalParameter:
{types::JvmFormalParameter}
'JvmFormalParameter'
name=EString
'{'
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('parameterType' parameterType=JvmTypeReference)?
'}';
EInt returns ecore::EInt:
'-'? INT;
EByte returns ecore::EByte:
'-'? INT;
EShort returns ecore::EShort:
'-'? INT;
ELong returns ecore::ELong:
'-'? INT;
EDouble returns ecore::EDouble:
'-'? INT? '.' INT (('E'|'e') '-'? INT)?;
EFloat returns ecore::EFloat:
'-'? INT? '.' INT (('E'|'e') '-'? INT)?;
EChar returns ecore::EChar:
'-'? INT;
JvmEnumerationLiteral returns types::JvmEnumerationLiteral:
{types::JvmEnumerationLiteral}
(deprecated?='deprecated')?
(static?='static')?
(final?='final')?
(volatile?='volatile')?
(transient?='transient')?
(constant?='constant')?
'JvmEnumerationLiteral'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('constantValue' constantValue=EJavaObject)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('type' type=JvmTypeReference)?
'}';
EJavaObject returns ecore::EJavaObject:
'EJavaObject' /* TODO: implement this rule and an appropriate IValueConverter */;
EObject returns ecore::EObject:
{ecore::EObject}
'EObject'
;
JvmField_Impl returns types::JvmField:
{types::JvmField}
(deprecated?='deprecated')?
(static?='static')?
(final?='final')?
(volatile?='volatile')?
(transient?='transient')?
(constant?='constant')?
'JvmField'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('constantValue' constantValue=EJavaObject)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('type' type=JvmTypeReference)?
'}';
JvmConstructor returns types::JvmConstructor:
{types::JvmConstructor}
(deprecated?='deprecated')?
(varArgs?='varArgs')?
'JvmConstructor'
'{'
('visibility' visibility=JvmVisibility)?
('simpleName' simpleName=EString)?
('annotations' '{' annotations+=JvmAnnotationReference ( "," annotations+=JvmAnnotationReference)* '}' )?
('localClasses' '{' localClasses+=JvmGenericType ( "," localClasses+=JvmGenericType)* '}' )?
('typeParameters' '{' typeParameters+=JvmTypeParameter ( "," typeParameters+=JvmTypeParameter)* '}' )?
('parameters' '{' parameters+=JvmFormalParameter ( "," parameters+=JvmFormalParameter)* '}' )?
('exceptions' '{' exceptions+=JvmTypeReference ( "," exceptions+=JvmTypeReference)* '}' )?
'}';
JvmUpperBound returns types::JvmUpperBound:
{types::JvmUpperBound}
'JvmUpperBound'
'{'
('typeReference' typeReference=JvmTypeReference)?
'}';
JvmLowerBound returns types::JvmLowerBound:
{types::JvmLowerBound}
'JvmLowerBound'
'{'
('typeReference' typeReference=JvmTypeReference)?
'}';
XIfExpression returns xbase::XIfExpression:
{xbase::XIfExpression}
'XIfExpression'
'{'
('if' if=XExpression)?
('then' then=XExpression)?
('else' else=XExpression)?
'}';
XSwitchExpression returns xbase::XSwitchExpression:
{xbase::XSwitchExpression}
'XSwitchExpression'
'{'
('switch' switch=XExpression)?
('cases' '{' cases+=XCasePart ( "," cases+=XCasePart)* '}' )?
('default' default=XExpression)?
('declaredParam' declaredParam=JvmFormalParameter)?
'}';
XVariableDeclaration returns xbase::XVariableDeclaration:
{xbase::XVariableDeclaration}
(writeable?='writeable')?
'XVariableDeclaration'
name=EString
'{'
('type' type=JvmTypeReference)?
('right' right=XExpression)?
'}';
XMemberFeatureCall returns xbase::XMemberFeatureCall:
{xbase::XMemberFeatureCall}
(explicitOperationCall?='explicitOperationCall')?
(explicitStatic?='explicitStatic')?
(nullSafe?='nullSafe')?
'XMemberFeatureCall'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('memberCallTarget' memberCallTarget=XExpression)?
('memberCallArguments' '{' memberCallArguments+=XExpression ( "," memberCallArguments+=XExpression)* '}' )?
'}';
XFeatureCall returns xbase::XFeatureCall:
{xbase::XFeatureCall}
(explicitOperationCall?='explicitOperationCall')?
'XFeatureCall'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('featureCallArguments' '{' featureCallArguments+=XExpression ( "," featureCallArguments+=XExpression)* '}' )?
'}';
XConstructorCall returns xbase::XConstructorCall:
{xbase::XConstructorCall}
(explicitConstructorCall?='explicitConstructorCall')?
'XConstructorCall'
'{'
('constructor' constructor=[types::JvmConstructor|EString])?
('arguments' '{' arguments+=XExpression ( "," arguments+=XExpression)* '}' )?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
'}';
XBooleanLiteral returns xbase::XBooleanLiteral:
{xbase::XBooleanLiteral}
(isTrue?='isTrue')?
'XBooleanLiteral'
;
XNullLiteral returns xbase::XNullLiteral:
{xbase::XNullLiteral}
'XNullLiteral'
;
XNumberLiteral returns xbase::XNumberLiteral:
{xbase::XNumberLiteral}
'XNumberLiteral'
'{'
('value' value=EString)?
'}';
XStringLiteral returns xbase::XStringLiteral:
{xbase::XStringLiteral}
'XStringLiteral'
'{'
('value' value=EString)?
'}';
XListLiteral returns xbase::XListLiteral:
{xbase::XListLiteral}
'XListLiteral'
'{'
('elements' '{' elements+=XExpression ( "," elements+=XExpression)* '}' )?
'}';
XSetLiteral returns xbase::XSetLiteral:
{xbase::XSetLiteral}
'XSetLiteral'
'{'
('elements' '{' elements+=XExpression ( "," elements+=XExpression)* '}' )?
'}';
XClosure returns xbase::XClosure:
{xbase::XClosure}
(explicitSyntax?='explicitSyntax')?
'XClosure'
'{'
('declaredFormalParameters' '{' declaredFormalParameters+=JvmFormalParameter ( "," declaredFormalParameters+=JvmFormalParameter)* '}' )?
('expression' expression=XExpression)?
'}';
XCastedExpression returns xbase::XCastedExpression:
{xbase::XCastedExpression}
'XCastedExpression'
'{'
('type' type=JvmTypeReference)?
('target' target=XExpression)?
'}';
XBinaryOperation returns xbase::XBinaryOperation:
{xbase::XBinaryOperation}
(reassignFirstArgument?='reassignFirstArgument')?
'XBinaryOperation'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('leftOperand' leftOperand=XExpression)?
('rightOperand' rightOperand=XExpression)?
'}';
XUnaryOperation returns xbase::XUnaryOperation:
{xbase::XUnaryOperation}
'XUnaryOperation'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('operand' operand=XExpression)?
'}';
XPostfixOperation returns xbase::XPostfixOperation:
{xbase::XPostfixOperation}
'XPostfixOperation'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('operand' operand=XExpression)?
'}';
XForLoopExpression returns xbase::XForLoopExpression:
{xbase::XForLoopExpression}
'XForLoopExpression'
'{'
('forExpression' forExpression=XExpression)?
('eachExpression' eachExpression=XExpression)?
('declaredParam' declaredParam=JvmFormalParameter)?
'}';
XBasicForLoopExpression returns xbase::XBasicForLoopExpression:
{xbase::XBasicForLoopExpression}
'XBasicForLoopExpression'
'{'
('expression' expression=XExpression)?
('eachExpression' eachExpression=XExpression)?
('initExpressions' '{' initExpressions+=XExpression ( "," initExpressions+=XExpression)* '}' )?
('updateExpressions' '{' updateExpressions+=XExpression ( "," updateExpressions+=XExpression)* '}' )?
'}';
XDoWhileExpression returns xbase::XDoWhileExpression:
{xbase::XDoWhileExpression}
'XDoWhileExpression'
'{'
('predicate' predicate=XExpression)?
('body' body=XExpression)?
'}';
XWhileExpression returns xbase::XWhileExpression:
{xbase::XWhileExpression}
'XWhileExpression'
'{'
('predicate' predicate=XExpression)?
('body' body=XExpression)?
'}';
XTypeLiteral returns xbase::XTypeLiteral:
'XTypeLiteral'
'{'
('arrayDimensions' '{' arrayDimensions+=EString ( "," arrayDimensions+=EString)* '}' )?
'type' type=[types::JvmType|EString]
'}';
XInstanceOfExpression returns xbase::XInstanceOfExpression:
'XInstanceOfExpression'
'{'
'type' type=JvmTypeReference
'expression' expression=XExpression
'}';
XThrowExpression returns xbase::XThrowExpression:
{xbase::XThrowExpression}
'XThrowExpression'
'{'
('expression' expression=XExpression)?
'}';
XTryCatchFinallyExpression returns xbase::XTryCatchFinallyExpression:
{xbase::XTryCatchFinallyExpression}
'XTryCatchFinallyExpression'
'{'
('expression' expression=XExpression)?
('finallyExpression' finallyExpression=XExpression)?
('catchClauses' '{' catchClauses+=XCatchClause ( "," catchClauses+=XCatchClause)* '}' )?
'}';
XAssignment returns xbase::XAssignment:
{xbase::XAssignment}
(explicitStatic?='explicitStatic')?
'XAssignment'
'{'
('feature' feature=[types::JvmIdentifiableElement|EString])?
('typeArguments' '{' typeArguments+=JvmTypeReference ( "," typeArguments+=JvmTypeReference)* '}' )?
('assignable' assignable=XExpression)?
('value' value=XExpression)?
'}';
Generator wrongly configured

70. Using Xbase

71. Using Xbase

72. I am missing the Maven part…

73. https://github.com/holgerschill/XtextCon_Xcore_Maven
A full working example can be found here
Tycho
Xtext Maven Plugin
Exec-Maven-Plugin
Xtend Maven Plugin

74. Pittfalls
<plugin>
<groupId>org.eclipse.xtext</groupId>
<artifactId>xtext-maven-plugin</artifactId>
<version>${xtext-version}</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<configuration>
<languages>
<language>
<setup>org.eclipse.xtext.ecore.EcoreSupport</setup>
</language>
<language>
<setup>org.eclipse.emf.codegen.ecore.xtext.GenModelSupport</setup>
</language>
<language>
<setup>org.eclipse.emf.ecore.xcore.XcoreStandaloneSetup</setup>
</language>
</languages>
<sourceRoots>
<root>${project.basedir}/model</root>
</sourceRoots>
</configuration>
Register right languages for Xcore

75. Pittfalls
Right dependencies to generate Java out of Xcore
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.core</groupId>
<artifactId>org.eclipse.core.resources</artifactId>
<version>3.7.100</version>
</dependency>
<dependency>
<groupId>org.eclipse.text</groupId>
<artifactId>org.eclipse.text</artifactId>
<version>3.5.101</version>
</dependency>
<dependency>
<groupId>org.eclipse.emf</groupId>
<artifactId>org.eclipse.emf.codegen.ecore.xtext</artifactId>
<version>${ecore-xtext-version}</version>
</dependency>
<dependency>
<groupId>org.eclipse.emf</groupId>
<artifactId>org.eclipse.emf.ecore.xcore.lib</artifactId>
<version>${ecore-xcore-lib-version}</version>
</dependency>
<dependency>
<groupId>org.eclipse.emf</groupId>
<artifactId>org.eclipse.emf.ecore.xcore</artifactId>
<version>${ecore-xcore-version}</version>
</dependency>
</dependencies>

76. Pittfalls
Set modelDirectory in Xcore files explicitly
@GenModel(modelDirectory="./src-gen")
package org.xtext.example.myfirstdsl
import common.NamedElement
import common.Referenceable
class FirstElement extends NamedElement, Referenceable {
refers Referenceable ref
}

77. Pittfalls
Don’t use classpath URIs in MWE2
var fileExtensions = "first"
var projectName = "org.xtext.example.firstdsl.lang"
var runtimeProject = "../${projectName}"
var generateXtendStub = true
//var grammarURI = "classpath:/org/xtext/example/firstdsl/Lang.xtext"
var grammarURI = "platform:/resource/${projectName}/src/org/xtext/example/firstdsl/Lang.xtext"

78. Pittfalls
Explicitly set path to generate Java classes
// generates Java API for the generated EPackages
fragment = ecore.EMFGeneratorFragment auto-inject {
javaModelDirectory = "/${projectName}/src-gen"
}

79. Questions?