public AuthPropertiesModelImpl(HttpServletRequest req,Map map){
  super(req,map);
  currentRealm=(String)map.get(AMAdminConstants.CURRENT_REALM);
  if (currentRealm == null) {
    currentRealm="/";
  }
}

public AuthPropertiesModelImpl ( HttpServletRequest req , Map map ) { super ( req , map ) ; currentRealm = ( String ) map . get ( AMAdminConstants . CURRENT_REALM ) ; if ( currentRealm == null ) { currentRealm = "/" ; } }
creates a model instance for configuring the core auth properties .
