module ActiveLdap::ObjectClass

def replace_class(*target_classes)
  new_classes = target_classes.flatten.compact.uniq
  assert_object_classes(new_classes)
  if new_classes.sort != classes.sort
    original_attributes = must + may
    set_attribute('objectClass', new_classes)
    clear_object_class_based_cache
    new_attributes = must + may
    removed_attributes = original_attributes - new_attributes
    clear_removed_attributes_data(removed_attributes)
  end
end