<?xml version="1.0" encoding="ISO-8859-1"?>
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore">
  <ecore:EPackage name="MyPackage">
    <eClassifiers xsi:type="ecore:EClass" name="MyClass">
    </eClassifiers>
    <eClassifiers xsi:type="ecore:EClass" name="MyClassyClass">
    </eClassifiers>
  </ecore:EPackage>
</xmi:XMI>

<?xml version="1.0" encoding="ASCII"?>
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI">
  <MyClass/>
  <MyClassyClass/>
</xmi:XMI>

<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns="MyPackage">

		EPackage metamodelpackage = EPackage.Registry.INSTANCE.getEPackage("./data/Test.ecore");

		//if the package is not cached, load the resource
		if(metamodelpackage == null){
			//load the package
			URI mmuri = URI.createFileURI("./data/Test.ecore");
			ResourceSet resourceSet = new ResourceSetImpl();
			resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put("ecore", new XMIResourceFactoryImpl());
		
			Resource resource = resourceSet.getResource(mmuri, true);
			metamodelpackage = (EPackage) resource.getContents().get(0);

			//register the metamodel with central
			EPackage.Registry.INSTANCE.put("./data/Test.ecore", metamodelpackage);
			EPackage.Registry.INSTANCE.put("MyPackage", metamodelpackage);
		}

		EFactory factory = metamodelpackage.getEFactoryInstance();

		EClass cls=(EClass)metamodelpackage.getEClassifier("MyClass");
		EObject data1 = factory.create(cls);
		cls=(EClass)metamodelpackage.getEClassifier("MyClassyClass");
		EObject data2 = factory.create(cls);

		ResourceSet resourceSet = new ResourceSetImpl();
		resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put("xmi", new XMIResourceFactoryImpl());
		
		//create the model result, where instances will be stored
		Resource resource = resourceSet.createResource( URI.createFileURI("./data/test_instance.xmi") , "MyPackage");

		resource.getContents().add(data1);
		resource.getContents().add(data2);

		try {
			resource.save(null);
		}
		catch (java.io.IOException e){
			System.err.println("could not write generated file to directory");
			e.printStackTrace();
			System.exit(-1);
		}