GWT Sorting a cell table, probably just something i didn't saw - gwt

Question

I've been struggling for the last couple of hour trying to sort a GWT CellTable.
It's really a stupid problem because it's been done here
http://gwt.google.com/samples/Showcase/Showcase.html#!CwCellTable
But I do not understand what I'm missing in the exemple ...
Here is my code I use to create the column:
Column<RemoteCommand, String> nbProducts = new Column<RemoteCommand, String>(
new TextCell()) {
#Override
public String getValue(RemoteCommand object) {
return object.getNumberProduct();
}
};
nbProducts.setSortable(true);
sortHandler.setComparator(nbProducts, new Comparator<RemoteCommand>() {
public int compare(RemoteCommand o1, RemoteCommand o2) {
cellTable.redraw();
return o1.getCommandSize().compareTo(o2.getCommandSize());
// System.out.println(Integer.parseInt(o1.getCommandSize() ) - Integer.parseInt(o2.getCommandSize()));
// return Integer.parseInt(o1.getCommandSize() ) - Integer.parseInt(o2.getCommandSize());
}
});
And here is the declaration of the table itself:
// Add a selection model so we can select cells.
final SelectionModel<RemoteCommand> selectionModel = new MultiSelectionModel<RemoteCommand>(
RemoteCommand.KEY_PROVIDER);
cellTable.setSelectionModel(selectionModel,
DefaultSelectionEventManager.<RemoteCommand> createCheckboxManager());
// Attach a column sort handler to the ListDataProvider to sort the list.
ListHandler<RemoteCommand> sortHandler = new ListHandler<RemoteCommand>(values);
cellTable.addColumnSortHandler(sortHandler);
// Initialize the columns.
initTableColumns(selectionModel, sortHandler);
cellTable.setRowData(values);
help is requierd :)

Answer 1

i guess You've already found the solution, but just to keep it here:
First, create your dataProvider with some known List.
Than feed sortHandler with same List;
and use the list to update data.
Celltable should be set as dataDisplay of the dataProvider:
List myDataList = new ArrayList();
ListDataProvider dataProvider = new ListDataProvider(KEY_PROVIDER);
dataProvider.setList(myDataList);
ListHandler sortHandler = new ListHandler(dataProvider.getList);
//tie provider and table
dataProvider.addDataDisplay(cellTable);
//when you need to update dataprovider
//first do some myDataList cleanup to remove old values
myListData.addAll(values);
//update data displays
dataProvider.refresh();
Consider, you have to always use one and the same List object.