/**
* start download the source
* @return void
*/
protected function download(\DateTime $date = NULL)
{
if ($this->storage === NULL) {
$this->storage = new File($this->context->cacheStorage, $date);
} elseif (!is_object($this->storage)) {
$this->storage = new $this->storage($this->context->cacheStorage, $date);
}
if ($this->download === NULL) {
$this->download = new CnbDay($this->storage, $this->default, $date);
} elseif (!is_object($this->download)) {
$this->download = new $this->download($this->storage, $this->default, $date);
}
if (!$this->download instanceof IDownload) {
throw new ExchangeException('Class for download must be instance of ' . __NAMESPACE__ . '\\IDownload.');
}
if (!$this->storage->needUpdate()) {
return;
}
$this->download->downloading();
}
