public static function getInstance($dbCon) { if (self::$m_instance == null) { self::$m_instance = new FQLEngine($dbCon); $fpath = dirname(__FILE__); self::$m_instance->addDbTableHandler("user", "{$fpath}/users-table-config.json", "UserDbTableAdaptor"); self::$m_instance->addDbTableHandler("friend", "", "FriendDbTableAdaptor"); self::$m_instance->addDbTableHandler("group", "{$fpath}/group-table-config.json"); self::$m_instance->addDbTableHandler("group_member", "", "GroupMemberDbTableAdaptor"); } return self::$m_instance; }