if (EditorUtils.getActiveXtextEditor() != null) {
IXtextDocument xtextDocument = EditorUtils.getActiveXtextEditor().getDocument();
XtextResource resource = xtextDocument.readOnly(new IUnitOfWork<XtextResource, XtextResource>() {

				public XtextResource exec(XtextResource state) throws Exception {
					return state;
				}
			});

EObject model = resource.getContents().get(0);
performSerialization(model);
}