    /* get sort service instance */
    GeneralComputingService /*tooltip,a general native computing instance*/gcsvr/*tooltip*/ = Utils.getGeneralComputingService("sort");

    /* instantiate a value info object */
    ValueInfo /*tooltip,an info object describes a single value or a set of values */vinfo/*tooltip*/ = new ValueInfo();

    /* instantiate an object stack list */
    List<long[][]> /*tooltip,a stack of object info that could be retrieved from durable objects*/objstack/*tooltip*/ = new ArrayList<long[][]>();

    /* fill it up with durable object info in order */
    objstack.add(this.ostack);

    /* configure the field id info stack to specify which field value
       need to be sorted */
    long[][] /*tooltip,a stack of field info*/fidinfostack/*tooltip*/ = { {2L, 1L} };

    /* assign the handler of a durable list to vinfo.handler */
    vinfo.handler = this.head;

    /* set a translate table from handler's memory allocator */
    vinfo.transtable = m_act.getTranslateTable();

    /* specify the durable type of value */
    vinfo.dtype = DurableType.LONG;

    /* generate an array of frame from
       object info stack and field info stack */
    vinfo.frames = Utils.genNativeParamForm(objstack, fidinfostack);

    /* wrap a set of value info as an array */
    ValueInfo[] vinfos = {vinfo};

    /* perform the sorting operation,
       the durable list and its value are not marshaled or un-marshaled
       across native boundary */
    long[] ret = gcsvr.perform("1dlong_bubble", vinfos);

    /* return the handler of new head of sorted durable list */
    this.head = ret[0];