/**
* Returns backend object by name
*
* @param string $backendName
*
* @return Backend
*
* @throws \InvalidArgumentException
* @throws CKFinderException
*/
public function getBackend($backendName)
{
if (isset($this->backends[$backendName])) {
return $this->backends[$backendName];
}
$backendConfig = $this->config->getBackendNode($backendName);
$adapterName = $backendConfig['adapter'];
if (!isset($this->registeredAdapters[$adapterName])) {
throw new \InvalidArgumentException(sprintf('Backends adapter "%s" not found. Please check configuration file.', $adapterName));
}
if (!is_callable($this->registeredAdapters[$adapterName])) {
throw new \InvalidArgumentException(sprintf('Backend instantiation callback for adapter "%s" is not a callable.', $adapterName));
}
$backend = call_user_func($this->registeredAdapters[$adapterName], $backendConfig);
if (!$backend instanceof Backend) {
throw new CKFinderException(sprintf('The instantiation callback for adapter "%s" didn\'t return a valid Backend object.', $adapterName));
}
$this->backends[$backendName] = $backend;
return $backend;
}
