Hello,
I want to run a model to model transformation with Xtend 2.3.1, without having a Xtext grammar.
My problem is:
When using the @Inject extension, it does not get injected.
When I run an JUnit test, the injected type is null and therefore creating a NullPointerException during runtime.
I started with a migration from Xtend 1, where the grammar was like:
extension my::package::classname_dt;
create targetmodel::Application mapApplication(Application app, targetmodel::Model model):
[...]
With Xtend2, it looks like:
class MyClass {
@Inject extension ClassnameDt
def targetmodel.Application create TargetmodelFactory::eINSTANCE.createApplication mapApplication(
sourcemodel.Application app,
targetmodel.Model model
) {
[...]
}
}
As I use a create method, I cannot inject the ClassnameDt as static extension, which would have solved my problem.
In the test class, I use
@RunWith(XtextRunner.class)
@InjectWith(InjectorProviderCustom.class)
public class TargetmodelFactoryServiceTest extends AbstractTargetmodelFactoryTest {
@Test
public void testAllParameterTypes() throws Exception {
[...]
}
}
which calls the transform() method of the TargetmodelFactory:
Injector injector = new mypackage.TargetmodelFactoryStandaloneSetup().createInjectorAndDoEMFRegistration();
//Injector injector = new Mwe2StandaloneSetup().createInjectorAndDoEMFRegistration();
//Injector injector = new XtendStandaloneSetup().createInjectorAndDoEMFRegistration();
Mwe2Runner mweRunner = injector.getInstance(Mwe2Runner.class);
//mweRunner.run(URI.createFileURI(mweFile.getAbsolutePath()), empty);
mweRunner.run(URI.createFileURI("myworkflow.mwe2"), prepareWorkflowProperties(), slots);
I tried several methods how to create the StandaloneSetup.
The TargetmodelFactoryStandaloneSetup looks like:
public class TargetmodelFactoryStandaloneSetup extends Mwe2StandaloneSetupGenerated {
public static void doSetup() {
new TargetmodelFactoryStandaloneSetup().createInjectorAndDoEMFRegistration();
}
public Injector createInjectorAndDoEMFRegistration() {
org.eclipse.xtext.xbase.XbaseStandaloneSetup.doSetup();
// register default ePackages
if (!Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().containsKey("ecore"))
Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(
"ecore", new org.eclipse.emf.ecore.xmi.impl.EcoreResourceFactoryImpl());
if (!Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().containsKey("xmi"))
Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(
"xmi", new org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl());
if (!EPackage.Registry.INSTANCE.containsKey(org.eclipse.xtext.XtextPackage.eNS_URI))
EPackage.Registry.INSTANCE.put(org.eclipse.xtext.XtextPackage.eNS_URI, org.eclipse.xtext.XtextPackage.eINSTANCE);
Injector injector = createInjector();
register(injector);
return injector;
}
public Injector createInjector() {
return Guice.createInjector(Modules2.mixin(
new mypackage.TargetmodelFactoryRuntimeModule(),
new org.eclipse.emf.mwe2.language.Mwe2RuntimeModule()
));
}
public void register(Injector injector) {
if (!EPackage.Registry.INSTANCE.containsKey("TargetmodelFactory")) {
EPackage.Registry.INSTANCE.put("TargetmodelFactory", mypackage.TargetmodelFactory.eINSTANCE);
}
// Copied from Mwe2StandaloneSetupGenerated:
org.eclipse.xtext.resource.IResourceFactory resourceFactory = injector.getInstance(org.eclipse.xtext.resource.IResourceFactory.class);
org.eclipse.xtext.resource.IResourceServiceProvider serviceProvider = injector.getInstance(org.eclipse.xtext.resource.IResourceServiceProvider.class);
Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put("mwe2", resourceFactory);
org.eclipse.xtext.resource.IResourceServiceProvider.Registry.INSTANCE.getExtensionToFactoryMap().put("mwe2", serviceProvider);
}
}
The RuntimeModule looks like:
public class TargetmodelFactoryRuntimeModule extends AbstractGenericResourceRuntimeModule {
// contributed by org.eclipse.xtext.generator.types.TypesGeneratorFragment
public org.eclipse.xtext.common.types.TypesFactory bindTypesFactoryToInstance() {
return org.eclipse.xtext.common.types.TypesFactory.eINSTANCE;
}
@Override
protected String getLanguageName() {
return "targetmodel";
}
@Override
protected String getFileExtensions() {
return "mod";
}
}
The InjectorProviderCustom is a copy from the domainmodel example:
public class InjectorProviderCustom extends TargetmodelFactoryInjectorProvider {
public Injector getInjector() {
if (injector == null) {
stateBeforeInjectorCreation = GlobalRegistries.makeCopyOfGlobalState();
this.injector = new TargetmodelFactoryStandaloneSetup() {
//@Override
//public Injector createInjector() {
// return Guice.createInjector(new SMMFactoryRuntimeModule() {
//@Override
//public ClassLoader bindClassLoaderToInstance() {
// return InjectorProviderCustom.class.getClassLoader();
//}
// });
//}
}.createInjectorAndDoEMFRegistration();
stateAfterInjectorCreation = GlobalRegistries.makeCopyOfGlobalState();
}
return injector;
}
}
Does anyone have any idea how to get these Xtend classes injected?
[Updated on: Wed, 31 October 2012 03:03]
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