xtend2:
«var str = "...." as String»
«FOR p : ParseXtext::parse(str).eAllContents.toIterable»
	«p»
«ENDFOR»

ComponentParams {
	ParamSetInstance Simple2.SimpleParam {
	}
}

    component = org.eclipse.xtext.generator.GeneratorComponent {
        register = org.xtend.mygen.GeneratorSetup {}
        slot = 'model'
        outlet = {
        	path = "src-gen"
        }
    }

java.lang.Exception: Xtext parsing error in parameter definition:
[XtextLinkingDiagnostic: null:16 Couldn't resolve reference to ParamSet 'Simple2.SimpleParam'.]

public class ParseXtext {
	public static EObject parse(String xtext, ResourceSet rs) {
		try {
			// see http://wiki.eclipse.org/Xtext/FAQ
			new org.eclipse.emf.mwe.utils.StandaloneSetup().setPlatformUri("..");
			Injector injector = new ParameterStandaloneSetup().createInjectorAndDoEMFRegistration();
			XtextResourceSet resourceSet = injector.getInstance(XtextResourceSet.class);
			resourceSet.addLoadOption(XtextResource.OPTION_RESOLVE_ALL, Boolean.TRUE);
			
//			Resource resource2 = resourceSet.createResource(URI.createURI("platform:/resource/SimpleRepository/model/parameter/simple.param"));
//			resource2.load(null);
//			resourceSet.getResources().add(resource2);
			
			Resource resource = resourceSet.createResource(URI.createURI("platform:/resource/xxxx/DUMMY.param"));
			InputStream in = new ByteArrayInputStream(xtext.getBytes());
			resource.load(in, resourceSet.getLoadOptions());
			
			if(resource.getErrors().size() > 0) {
				throw new Exception("Xtext parsing error in parameter definition:\n"+resource.getErrors());
			}
			return resource.getContents().get(0);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;