existNextPage = startWithOffset < (long) (allPageCount - 1) * (long) pageSize;
        currentPageNumber = start / pageSize + 1;
        if (existNextPage && size() < pageSize) {
            // collapsing
            existNextPage = false;
            allPageCount = currentPageNumber;
        }
        currentStartRecordNumber = allRecordCount != 0 ? start + 1 : 0;