module ActiveLdap::ObjectClass

def assert_valid_object_class_value(new_classes)
  _schema = schema
  invalid_classes = new_classes.reject do |new_class|
    !_schema.object_class(new_class).id.nil?
  end
  unless invalid_classes.empty?
    format = _("unknown objectClass in LDAP server: %s")
    message = format % invalid_classes.join(', ')
    raise ObjectClassError, message
  end
end