/**
* Connect
*
* This method setup parameters to connect to a MongoDB
* database. The connection is done when it is needed.
*
* @param string $db Database name
* @param string $host Host to connect
* @param string $user User (Auth)
* @param string $pwd Password (Auth)
*
* @return void
*/
public static final function connect($db, $host = 'localhost', $user = NULL, $pwd = NULL)
{
self::$_host = $host;
self::$_db = $db;
self::$_user = $user;
self::$_pwd = $pwd;
}
