public static MetaModelManager getMetaModelManager(Resource resource) {
MetaModelManagerResourceAdapter adapter =
MetaModelManagerResourceAdapter.getAdapter(resource, null);
MetaModelManager metaModelManager = adapter.getMetaModelManager();
assert metaModelManager != null;
return metaModelManager;
}
/**
* Create an Xtext resource containing the parsed expression within a typeContext and supervised
* by a metaModelManager.
*
* <p>Provided an EssentialOCL resource registration has been made the created resource named
* internal.essentialocl may be cast to an XtextResource. Semantic errors may be found at the
* Resource.errors and may be converted to ParseExceptions by invoking checkResourceErrors.
*
* @param metaModelManager the overall type / meta-model domain
* @param typeContext the type that provides the scope of expression
* @param expression to be parsed
* @return the Xtext resource which may be cast to XtextResource
* @throws IOException if resource loading fails
*/
public static Resource createXtextResource(
MetaModelManager metaModelManager, URI uri, NamedElement typeContext, String expression)
throws IOException {
InputStream inputStream = new ByteArrayInputStream(expression.getBytes());
ResourceSetImpl resourceSet = new ResourceSetImpl();
Resource resource = resourceSet.createResource(uri);
MetaModelManagerResourceAdapter.getAdapter(resource, metaModelManager);
if (resource instanceof EvaluationContext) {
((EvaluationContext) resource).setContext(typeContext, null);
}
resource.load(inputStream, null);
return resource;
}
public static ExpressionInOcl resolveSpecification(
MetaModelManager metaModelManager, URI uri, NamedElement contextClassifier, String expression)
throws ParserException {
Resource resource = null;
try {
resource = createXtextResource(metaModelManager, uri, contextClassifier, expression);
checkResourceErrors(NLS.bind(OCLMessages.ErrorsInResource, expression), resource);
return getExpressionInOcl(resource);
} catch (IOException e) {
// throw new ParserException("Failed to load expression", e);
ExpressionInOcl specification = PivotFactory.eINSTANCE.createExpressionInOcl();
OclExpression invalidValueBody = metaModelManager.createInvalidExpression();
specification.setBodyExpression(invalidValueBody);
return specification;
} finally {
if (resource != null) {
MetaModelManagerResourceAdapter adapter =
MetaModelManagerResourceAdapter.findAdapter(resource);
if (adapter != null) {
adapter.dispose();
}
}
}
}