Xtext refering to element from different file does not work - dsl

Question

Hello I am having two files in my xtext editor, the first one containing all definitions and the second one containing the executed recipe. The Grammar looks like this:
ServiceAutomationProgram:
('package' name=QualifiedName ';')?
imports+=ServiceAutomationImport*
definitions+=Definition*;
ServiceAutomationImport:
'import' importedNamespace=QualifiedNameWithWildcard ';';
Definition:
'define' ( TypeDefinition | ServiceDefinition |
SubRecipeDefinition | RecipeDefinition) ';';
TypeDefinition:
'quantity' name=ID ;
SubRecipeDefinition:
'subrecipe' name=ID '('( subRecipeParameters+=ServiceParameterDefinition (','
subRecipeParameters+=ServiceParameterDefinition)*)? ')' '{'
recipeSteps+=RecipeStep*
'}';
RecipeDefinition:
'recipe' name=ID '{' recipeSteps+=RecipeStep* '}';
RecipeStep:
(ServiceInvocation | SubRecipeInvocation) ';';
SubRecipeInvocation:
name=ID 'subrecipe' calledSubrecipe=[SubRecipeDefinition] '('( parameters+=ServiceInvocationParameter (',' parameters+=ServiceInvocationParameter)* )?')'
;
ServiceInvocation:
name=ID 'service' service=[ServiceDefinition]
'(' (parameters+=ServiceInvocationParameter (',' parameters+=ServiceInvocationParameter)*)? ')'
;
ServiceInvocationParameter:
ServiceEngineeringQuantityParameter | SubRecipeParameter
;
ServiceEngineeringQuantityParameter:
parameterName=[ServiceParameterDefinition] value=Amount;
ServiceDefinition:
'service' name=ID ('inputs' serviceInputs+=ServiceParameterDefinition (','
serviceInputs+=ServiceParameterDefinition)*)?;
ServiceParameterDefinition:
name=ID ':' (parameterType=[TypeDefinition]);
;
SubRecipeParameter:
parameterName=[ServiceParameterDefinition]
;
QualifiedNameWithWildcard:
QualifiedName '.*'?;
QualifiedName:
ID ('.' ID)*;
Amount:
INT ;
....
definitionfile file.mydsl:
define quantity Temperature;
define service Heater inputs SetTemperature:Temperature;
define subrecipe sub_recursive() {
Heating1 service Heater(SetTemperature 10);
};
....
recipefile secondsfile.mydsl:
define recipe Main {
sub1 subrecipe sub_recursive();
};
.....
In my generator file which looks like this:
override void doGenerate(Resource resource, IFileSystemAccess2 fsa, IGeneratorContext context) {
for (e : resource.allContents. toIterable.filter (RecipeDefinition)){
e.class;//just for demonstration add breakpoint here and //traverse down the tree
}
}
I need as an example the information RecipeDefinition.recipesteps.subrecipeinvocation.calledsubrecipe.recipesteps.serviceinvocation.service.name which is not accessible (null) So some of the very deep buried information gets lost (maybe due to lazylinking?).
To make the project executable also add to the scopeprovider:
public IScope getScope(EObject context, EReference reference) {
if (context instanceof ServiceInvocationParameter
&& reference == MyDslPackage.Literals.SERVICE_INVOCATION_PARAMETER__PARAMETER_NAME) {
ServiceInvocationParameter invocationParameter = (ServiceInvocationParameter) context;
List<ServiceParameterDefinition> candidates = new ArrayList<>();
if(invocationParameter.eContainer() instanceof ServiceInvocation) {
ServiceInvocation serviceCall = (ServiceInvocation) invocationParameter.eContainer();
ServiceDefinition calledService = serviceCall.getService();
candidates.addAll(calledService.getServiceInputs());
if(serviceCall.eContainer() instanceof SubRecipeDefinition) {
SubRecipeDefinition subRecipeCall=(SubRecipeDefinition) serviceCall.eContainer();
candidates.addAll(subRecipeCall.getSubRecipeParameters());
}
return Scopes.scopeFor(candidates);
}
else if(invocationParameter.eContainer() instanceof SubRecipeInvocation) {
SubRecipeInvocation serviceCall = (SubRecipeInvocation) invocationParameter.eContainer();
SubRecipeDefinition calledSub = serviceCall.getCalledSubrecipe();
candidates.addAll(calledSub.getSubRecipeParameters());
return Scopes.scopeFor(candidates);
}
}return super.getScope(context, reference);
}
When I put all in the same file it works as it does the first time executed after launching runtime but afterwards(when dogenerate is triggered via editor saving) some information is missing. Any idea how to get to the missing informations? thanks a lot!