Client side caching (CellTable)

Hi,

We are trying to create a cell table with tons of entries.
We use pagination. (AsyncDataProvider and Pager)  and would like to fetch on demand entries.

Currently it does work as intended,

only problem is, when we show some entries on the cell table (let's say entries #1-#25)
and then change page to fetch the entries (#1000 - #1025)
when changing back again to entries #1-#25  gwt still makes a server call !
we would like to create a simple cache in the client and by this skip the unnecessary call like the example above.

any ideas?

Thanks.
 

P.S here is a piece of code of the onRangeChanged:

AsyncDataProvider<Contact> provider = new AsyncDataProvider<Contact>() {    @Override    protected void onRangeChanged(HasData<Contact> display) {      int start = display.getVisibleRange().getStart();      int end = start + display.getVisibleRange().getLength();      end = end >= DBHelper.size() ? DBHelper.size() : end;      List<Contact> sub = DBHelper.get(start, end);      updateRowData(start, sub);            }  };  

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