JavaFX FilteredList, filtering based on property of items in the list

Question

I have a case where I need to filter a ObservableList based on some properties of the items (i.e. the condition is internal and not external). I fou

Answer 1

If you are using database loading function plus need to filter multiple fields, this solution will help.

 ObservableList poData = FXCollections.observableArrayList();
 FilteredList filteredData;
  private void load()  {
        PurchaseOrder po = new PurchaseOrder();
        try {
            poData = po.loadTable("purchase_orders", beanFields); // Database loading data
        } catch (SQLException ex) {
            Logger.getLogger(PurchaseOrdersController.class.getName()).log(Level.SEVERE, null, ex);
        }

        filteredData = new FilteredList<>(poData, t -> true); //Encapsulate data with filter

        poTable.setItems(filteredData); //Load filtered data into table

        //Set event trigger for all filter textboxes
        txtFilter.textProperty().addListener(obs->{
            filter(filteredData);
        });
        txtFilter2.textProperty().addListener(obs->{
            filter(filteredData);
        });
  }

   private void filter(FilteredList filteredData)
    {
            filteredData.setPredicate(PurchaseOrder -> {
                // If all filters are empty then display all Purchase Orders
                if ((txtFilter.getText() == null || txtFilter.getText().isEmpty()) 
                        && (txtFilter2.getText() == null || txtFilter2.getText().isEmpty())) {
                    return true;
                }

                // Convert filters to lower case
                String lowerCaseFilter = txtFilter.getText().toLowerCase();
                String lowerCaseFilter2 = txtFilter2.getText().toLowerCase();

                //If fails any given criteria, fail completely
                if(txtFilter.getText().length()>0)
                    if (PurchaseOrder.get("vendor_name").toLowerCase().contains(lowerCaseFilter) == false)
                        return false;
                if(txtFilter2.getText().length()>0)
                    if (PurchaseOrder.get("PONumber").toLowerCase().contains(lowerCaseFilter2) == false)
                        return false;

                return true; // Matches given criteria
            });
    }