private function formatToWriter(Format $format, \SplFileInfo $file)
{
if ($format instanceof CsvFormat) {
$writer = new CsvWriter($format->getDelimiter(), $format->getEnclosure(), fopen($file, 'a'), false, $format->isHeaderInFirstRow());
} elseif ($format instanceof ExcelFormat) {
$writer = new ExcelWriter($file->openFile('a'), $format->getActivesheet(), $format->getExceltype(), $format->isHeaderInFirstRow());
} elseif ($format instanceof XmlFormat) {
$writer = new XMLWriter($file->openFile('a'));
} elseif ($format instanceof CompressedFormat) {
throw new \LogicException('Not implemented!');
} else {
throw new InvalidConfigurationException('Cannot build writer. Unknown format: ' . $format);
}
return $writer;
}
