/**
  * @param form_persistentdocument_baseform $form
  * @param integer[] $excludeIds
  */
 public function getValidActivationFields($form, $excludeIds = array())
 {
     $query = form_FieldService::getInstance()->createQuery();
     $query->add(Restrictions::descendentOf($form->getId()));
     if (f_util_ArrayUtils::isNotEmpty($excludeIds)) {
         $query->add(Restrictions::notin('id', $excludeIds));
     }
     $validFields = array();
     foreach ($query->find() as $field) {
         if ($field instanceof form_persistentdocument_boolean || $field instanceof form_persistentdocument_list) {
             $validFields[] = $field;
         }
     }
     return $validFields;
 }