@SuppressWarnings("unchecked")
protected List<ITableCompletationItem> getTableCompletationItem(String token) {
List<ITableCompletationItem> list = new ArrayList<ITableCompletationItem>();
try {
list = (List<ITableCompletationItem>) system.query(new GetCourseByToken(token));
} catch (Exception e) {
}
return list;
}