protected function readFromTempFile()
    {
        // Upload temp file
        $sUploadTempFile = $this->getUploadTempFile();
        $aFiles = json_decode(file_get_contents($sUploadTempFile), true);
        foreach($aFiles as $sVarName => $aUserFiles)
        {
            $this->aUserFiles[$sVarName] = [];
            foreach($aUserFiles as $aUserFile)
            {
                $this->aUserFiles[$sVarName][] = UploadedFile::fromTempData($aUserFile);
            }
        }
        unlink($sUploadTempFile);
    }