/**
  * used in notempty validation rule
  */
 function dataConsideredEmpty($data, $repeatCounter)
 {
     if ((int) JRequest::getVar('rowid', 0) !== 0) {
         if (JRequest::getVar('task') == '') {
             return parent::dataConsideredEmpty($data, $repeatCounter);
         }
         $olddaata = $this->getFormModel()->_origData[$repeatCounter];
         $name = $this->getFullName(false, true, false);
         return JArrayHelper::getValue(JArrayHelper::fromObject($olddaata), $name) === '' ? true : false;
     }
     $groupModel = $this->getGroup();
     if ($groupModel->isJoin()) {
         $name = $this->getFullName(false, true, false);
         $joinid = $groupModel->getGroup()->join_id;
         $joindata = JRequest::getVar('join', '', 'files', 'array', array());
         if (!array_key_exists('name', $joindata)) {
             return true;
         }
         $file = (array) $joindata['name'][$joinid][$name];
         return JArrayHelper::getValue($file, $repeatCounter, '') == '' ? true : false;
     } else {
         if ($this->isJoin()) {
             $join = $this->getJoinModel()->getJoin();
             $joinid = $join->id;
             $joindata = JRequest::getVar('join', '', 'post', 'array', array());
             $joindata = JArrayHelper::getValue($joindata, $joinid, array());
             $name = $this->getFullName(false, true, false);
             $joindata = JArrayHelper::getValue($joindata, $name, array());
             $joinids = JArrayHelper::getValue($joindata, 'id', array());
             return empty($joinids) ? true : false;
         } else {
             $name = $this->getFullName(true, true, false);
             $file = JRequest::getVar($name, '', 'files', 'array', array());
             if ($groupModel->canRepeat()) {
                 return JArrayHelper::getValue($file['name'], $repeatCounter, '') == '' ? true : false;
             }
         }
     }
     if (!array_key_exists('name', $file)) {
         $file = JRequest::getVar($name);
         return $file == '' ? true : false;
         //ajax test - nothing in files
     }
     // no files selected?
     return $file['name'] == '' ? true : false;
 }