public function createNewFilename()
 {
     $nameComponents = array();
     $nameComponents[] = $this->getDocDate()->format('y-m-d');
     if ($this->getScanningNumber() > 0) {
         $nameComponents[] = $this->getScanningNumber();
     }
     if ($this->getPaymentStatus() != PaymentStatus::NOT_APPLICABLE) {
         $nameComponents[] = PaymentStatus::getFileComponent($this->getPaymentStatus());
     }
     $nameComponents[] = $this->getNote();
     return join(' - ', $nameComponents) . '.pdf';
 }