/**
* Registers a function to be called on init
*
* This function will be called when Flow inits and imports
* things such as the $_GET, $_POST datasets. This permits the developer
* to perform actions before assignement to flow such as stripping tags, etc
* This method will be given an array and needs to return an array.
*
* @param mixed $handler a function or an array of class=>method
*
* @return null
*/
public static function registerImportHandler($handler)
{
if (is_callable($handler)) {
self::$_importHandler = $handler;
} else {
Nexista_Error::init('Flow Import Handler is not callable!');
}
}