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Xtext
The related StackOverflow post pretty much gets it right.
A similar Xtend code is the following:
def static void save(Cypher cypher, String filename) {
EcoreUtil.resolveAll(cypher)
Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(CypherUtil.MODEL_EXTENSION,
new XMIResourceFactoryImpl())
val resourceSet = new ResourceSetImpl
val filePath = filename + "." + CypherUtil.MODEL_EXTENSION
val uri = URI.createFileURI(filePath)
val resource = resourceSet.createResource(uri)
resource.contents.add(cypher)
val saveOptions = new HashMap<String, Object>
saveOptions.put(XMIResource.OPTION_SCHEMA_LOCATION, Boolean.TRUE);
saveOptions.put(XMIResource.OPTION_ENCODING, "UTF-8");
resource.save(saveOptions)
}For me, the generated models could not be opened with the Sample Reflective Ecore Model Editor. This however did not work for me as it threw an org.eclipse.emf.ecore.xmi.PackageNotFoundException: Package with uri ... exception.
Theoretically, adding the OPTION_SCHEMA_LOCATION option should have helped, but it had absolutely no effect (see the Eclipse forum).
The solution was to have the Xtext project as a plug-in project in the workspace. You do not have to install it, the only restriction is that the project has to be free from errors & opened.
The EcoreUtil.resolveAll(...) call is important, else the model may contain unresolved references.
If you press Ctrl + space, the following error appears on the Gradle output:
1) No implementation for org.eclipse.xtext.preferences.IPreferenceValuesProvider annotated with @org.eclipse.xtext.formatting2.FormatterPreferences() was bound.
while locating org.eclipse.xtext.preferences.IPreferenceValuesProvider annotated with @org.eclipse.xtext.formatting2.FormatterPreferences()
for field at org.eclipse.xtext.web.server.XtextServiceDispatcher.formatterPreferencesProvider(XtextServiceDispatcher.java:98)
while locating org.eclipse.xtext.web.server.XtextServiceDispatch