/**
  * Validates all modified columns of given AppDelegation object.
  * If parameter $columns is either a single column name or an array of column names
  * than only those columns are validated.
  *
  * NOTICE: This does not apply to primary or foreign keys for now.
  *
  * @param      AppDelegation $obj The object to validate.
  * @param      mixed $cols Column name or array of column names.
  *
  * @return     mixed TRUE if all columns are valid or the error message of the first invalid column.
  */
 public static function doValidate(AppDelegation $obj, $cols = null)
 {
     $columns = array();
     if ($cols) {
         $dbMap = Propel::getDatabaseMap(AppDelegationPeer::DATABASE_NAME);
         $tableMap = $dbMap->getTable(AppDelegationPeer::TABLE_NAME);
         if (!is_array($cols)) {
             $cols = array($cols);
         }
         foreach ($cols as $colName) {
             if ($tableMap->containsColumn($colName)) {
                 $get = 'get' . $tableMap->getColumn($colName)->getPhpName();
                 $columns[$colName] = $obj->{$get}();
             }
         }
     } else {
         if ($obj->isNew() || $obj->isColumnModified(AppDelegationPeer::DEL_TYPE)) {
             $columns[AppDelegationPeer::DEL_TYPE] = $obj->getDelType();
         }
         if ($obj->isNew() || $obj->isColumnModified(AppDelegationPeer::DEL_PRIORITY)) {
             $columns[AppDelegationPeer::DEL_PRIORITY] = $obj->getDelPriority();
         }
         if ($obj->isNew() || $obj->isColumnModified(AppDelegationPeer::DEL_THREAD_STATUS)) {
             $columns[AppDelegationPeer::DEL_THREAD_STATUS] = $obj->getDelThreadStatus();
         }
     }
     return BasePeer::doValidate(AppDelegationPeer::DATABASE_NAME, AppDelegationPeer::TABLE_NAME, $columns);
 }