Sorting cell table columns populated from gwt rpc not working

[Olar Andrei]

Hello, I'm pretty new to GWT


I have a problem trying to sort specific columns from a cell table, whcih 
is populated from the DB, using RPC. Basically I'm trying to sort the 
family name column alphabetically, and it's just not working. Table gets 
fully populated, but sorting does not work.

Any ideas why ? 


Thanks in advance


// Create the family name column.
    final TextColumn<ContactInfo> familyNameColumn = new 
TextColumn<ContactInfo>() {

        @Override
        public String getValue(ContactInfo object) {
            return object.getFamilyName();
        }
    };
    table.setColumnWidth(familyNameColumn, 20, Unit.PCT);

    // Make the family name sortable
    familyNameColumn.setSortable(true);

// Add the columns
    table.addColumn(familyNameColumn, UserMenuConstants.FAMILY_NAME_COLUMN);
    table.addColumn(familyAdministratorColumn, 
UserMenuConstants.FAMILY_ADMINISTRATOR_COLUMN);
    table.addColumn(apartmentNuberColumn, 
UserMenuConstants.FAMILY_APARTMENT_NUMBER_COLUMN);
    table.addColumn(emailColumn, UserMenuConstants.EMAIL_ADDRESS_COLUMN);
    table.addColumn(phoneNumberColumn, UserMenuConstants.PHONE_NUMBER_COLUMN);

    DBGetContactInfoAsync rpcService = (DBGetContactInfoAsync) 
GWT.create(DBGetContactInfo.class);
    ServiceDefTarget target = (ServiceDefTarget) rpcService;
    String moduleRelativeURL = GWT.getModuleBaseURL() + "DBGetContactInfoImpl";
    target.setServiceEntryPoint(moduleRelativeURL);

    rpcService.getContacts(new AsyncCallback<List<ContactInfo>>() {

        @Override
        public void onSuccess(List<ContactInfo> result) {

            table.setRowCount(result.size());

            ListDataProvider<ContactInfo> dataProvider = new 
ListDataProvider<ContactInfo>();
            dataProvider.addDataDisplay(table);

            List<ContactInfo> list = dataProvider.getList();
            for (ContactInfo contactInfo : result) {
                list.add(contactInfo);
            }

            ListHandler<ContactInfo> listHandler = new 
ListHandler<ContactInfo>(result);

            listHandler.setComparator(familyNameColumn, new 
Comparator<ContactInfo>() {

                @Override
                public int compare(ContactInfo o1, ContactInfo o2) {
                    return o1.getFamilyName().compareTo(o2.getFamilyName());
                }
            });

            table.addColumnSortHandler(listHandler);

        }

        @Override
        public void onFailure(Throwable caught) {
            ...
        }
    });



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