private function generateAutomaticID()
{
$this->_flags &= ~self::IS_ID_SET;
if (!isset($this->_namingContainer->_rf[self::RF_NAMED_CONTROLS_ID])) {
$this->_namingContainer->_rf[self::RF_NAMED_CONTROLS_ID] = 0;
}
$id = $this->_namingContainer->_rf[self::RF_NAMED_CONTROLS_ID]++;
$this->_id = self::AUTOMATIC_ID_PREFIX . $id;
$this->_namingContainer->clearNameTable();
}