/**
* Returns an instance of the requested external
* media driver.
*
* @param string $service
* @param string $mediaId
* @return object
*/
public static function factory($driver, $mediaId)
{
$driver = 'Externalmedia_' . zula_camelise($driver);
if (class_exists($driver)) {
try {
return new $driver($mediaId);
} catch (ExternalMediaDriver_NoRead $e) {
throw new ExternalMedia_DriverError($e->getMessage());
}
} else {
throw new ExternalMedia_NoDriver('External driver "' . $driver . '" does not exist');
}
}
/**
* Provides access to all available helpers
*
* @param string $helper
* @return object
*/
protected function _helper($helper)
{
if (!isset(self::$helpers[$helper])) {
$class = 'View_Helpers_' . zula_camelise($helper);
if (!class_exists($class)) {
throw new View_HelperNoExist('View unable to load helper "' . $helper . '" as it does not exist');
}
self::$helpers[$helper] = new $class();
}
return self::$helpers[$helper];
}
