BiTel

import bitel.billing.server.radius.*;
import ru.bitel.bgbilling.kernel.network.radius.*;

userName = request.getStringAttribute( -1, RadiusStandartAttributes.User_Name, "" );

if (request.getCode() == RadiusPacket.ACCESS_REQUEST) {
   //Зарезаем логины с пробелами по краям
   if (!userName.trim().equals(userName)) {
      request.setStringAttribute(-1, RadiusStandartAttributes.User_Name, userName+"-wrongUsername");
      request.addAttribute(new RadiusAttribute.RadiusAttributeString(-1, RadiusStandartAttributes.Vendor_Specific, "Username with a trailing space characters is not allowed!"));
   }
}