CheckResourceUtil.java 文件源码

/**
 * Gets all available grammars.
 * <p>
 * The result contains no null entries.
 * </p>
 *
 * @return an iterator over all grammars in the workspace followed by all those in the registry.
 */
private Iterable<Grammar> allGrammars() {
  final ResourceSet resourceSetForResolve = new ResourceSetImpl();
  final Function<IEObjectDescription, Grammar> description2GrammarTransform = new Function<IEObjectDescription, Grammar>() {
    @Override
    public Grammar apply(final IEObjectDescription desc) {
      EObject obj = desc.getEObjectOrProxy();
      if (obj != null && obj.eIsProxy()) {
        obj = EcoreUtil.resolve(obj, resourceSetForResolve);
      }
      if (obj instanceof Grammar && !obj.eIsProxy()) {
        return (Grammar) obj;
      } else {
        return null;
      }

    }
  };

  final Iterable<IEObjectDescription> grammarDescriptorsFromIndex = Access.getIResourceDescriptions().get().getExportedObjectsByType(XtextPackage.Literals.GRAMMAR);
  return Iterables.concat(Iterables.filter(Iterables.transform(grammarDescriptorsFromIndex, description2GrammarTransform), Predicates.notNull()), allGrammarsFromRegistry());
}