How to programmatically generate an EMF model (.ecore, .genmodel) from XSD schema?

Question

I have been trying to do this as the last stage in a standalone application to convert from the file format used by a modeling program to an EMF model. I am able to convert the original format to XSD, which I can manually convert to an EMF model using the Eclipse importer, but I do not know how to do this programmatically to automate the process. Java commands would work fine, as would any command-line statement to do the same, since I could just execute the statement from within Java. I have spent a while looking for how to do this, trying http://wiki.eclipse.org/Generating_Dynamic_Ecore_from_XML_Schema and a variety of other potential solutions, but nothing seems to work. If anyone might be able to provide some sample code as to how to generate the .ecore and(/or?) .genmodel files from an XSD file, I'd very much appreciate it, but even some guidance as to how I can proceed would help very much.

Thank you.

Answer 1

Take a look at the class org.eclipse.xsd.ecore.XSDEcoreBuilder and the way it's used by the Eclipse importer wizard.
Seems to be fairly straightforward to use, you simply call one of its generate methods and you get back either a Collection<Resource> or a Collection<EObject>.

(Edit: answering additional questions in comments)
The EPackage class is the Ecore equivalent of xs:schema, which contains the EClasses, which are in turn the Ecore equivalents of xs:complexTypes.

The following code snippet should create and save a foo.ecore file into the same folder as the source XSD. If foo.xsd has additional imported XSDs, they will be coverted into separate .ecore files, hence the return type Collection<Resource>.

URI schemaURI = URI.createFileURI("foo.xsd");
Collection<Resource> ecoreResources = XSDEcoreBuilder.generateResources(schemaURI);
for (Resource ecoreResource : ecoreResources) {
    ecoreResource.save(null);
}