/**
* @return array
*/
public function listDirectory($directory = '')
{
$listing = null;
if (method_exists($this->source, 'listDirectory')) {
$cacheFile = 'dir-' . md5($directory) . '.cache';
if ($this->needsRebuild($cacheFile)) {
$listing = $this->source->listDirectory($directory);
$this->serializeCache->write($cacheFile, serialize($listing));
} else {
$listing = unserialize($this->serializeCache->read($cacheFile));
}
}
return $listing;
}
/**
* {@inheritdoc}
*/
public function listDirectory($directory = '')
{
return $this->master->listDirectory($directory);
}
