Page Comparison

private void onRefresh() {
    DataSource dataSource = listGrid.getDataSource();
    Criteria criteria = listGrid.getCriteria();

    Integer[] visibleRows = listGrid.getVisibleRows();
    Integer startRow = 0;
    Integer endRow = (visibleRows[1] + listGrid.getResultSet().getResultSize());

    DSRequest request = new DSRequest();
    request.setStartRow(startRow);
    request.setEndRow(endRow);
    request.setSortBy(listGrid.getSort());

    dataSource.fetchData(criteria, new DSCallback() {
        @Override
        public void execute(DSResponse response, Object rawData, DSRequest request) {
            DataSource dataSource = listGrid.getDataSource();

            ResultSet resultSet = new ResultSet(dataSource);
            resultSet.setInitialLength(response.getTotalRows());
            resultSet.setInitialData(response.getData());
            resultSet.setInitialSort(listGrid.getSort());
			resultSet.setCriteria(listgrid.getCriteria());

            listGrid.setData(resultSet);
        }

    }, request);
}