Classcast während Table Bearbeitung

Question

Ich möchte die quantityColumn des folgenden Codes editierbar setzen:

public class ControladorView implements Initializable { 

    @FXML private MenuItem mNew, mOpen, mSave, mPrint; 

    @FXML 
    private MenuButton mCategory; 

    @FXML private Button bAccept, bCancel, bAdd, bRemove, bClear; 

    @FXML private TableView tableViewItem; 
    @FXML private TableColumn<Product, String> nameItemColumn; 
    @FXML private TableColumn<Product, Double> priceColumn; 
    @FXML private TableColumn<Product, Integer> availableColumn; 

    private ObservableList<Product> itemData; 

    @FXML private TableView tableViewBudget; 
    @FXML private TableColumn<Product, String> nameBudgetColumn; 
    @FXML private TableColumn<Product, Double> outTaxColumn; 
    @FXML private TableColumn<Product, Double> inTaxColumn; 
    @FXML private TableColumn<Product, Integer> quantityColumn; 

    private ObservableList<Product> budgetData; 

    @FXML private TextField tFName, tFMin, tFMax; 

    @Override 
    public void initialize(URL location, ResourceBundle resources) { 
     //Items Table 
     nameItemColumn.setCellValueFactory(
      new PropertyValueFactory<>("description")); 
     priceColumn.setCellValueFactory(
      new PropertyValueFactory<>("price")); 
     availableColumn.setCellValueFactory(
      new PropertyValueFactory<>("stock")); 

     //Se utiliza para Añadir 
     itemData = FXCollections.observableArrayList(); 

     //Budget Table 
     nameBudgetColumn.setCellValueFactory(
      new PropertyValueFactory<>("description")); 
     inTaxColumn.setCellValueFactory(
      new PropertyValueFactory<>("price")); 
     outTaxColumn.setCellValueFactory(cellData -> 
      new SimpleDoubleProperty(cellData.getValue().getPrice() * 0.79).asObject()); 
     nameBudgetColumn.setCellFactory(tc -> new TextFieldTableCell<>()); 

     //Se utiliza para Eliminar y Limpiar 
     budgetData = FXCollections.observableArrayList(); 
     tableViewBudget.setItems(budgetData); 

     //Bindings Filter 
     final BooleanBinding noFiltOp = Bindings.equal(mCategory.textProperty(), "Categoría").or(
             Bindings.equal(mCategory.textProperty(), "Categoría").and(
             Bindings.isEmpty(tFMin.textProperty())).and(
             Bindings.isEmpty(tFMax.textProperty()))).or(
             Bindings.equal(mCategory.textProperty(), "Categoría").and(
             Bindings.isEmpty(tFName.textProperty()))).or(
             Bindings.equal(mCategory.textProperty(), "Categoría").and(
             Bindings.isEmpty(tFName.textProperty())).and(
             Bindings.isEmpty(tFMin.textProperty())).and(
             Bindings.isEmpty(tFMax.textProperty()))); 

     final BooleanBinding noCancel = Bindings.isEmpty(tFName.textProperty()).and(
             Bindings.equal(mCategory.textProperty(), "Categoría")).and(
             Bindings.isEmpty(tFMin.textProperty())).and(
             Bindings.isEmpty(tFMax.textProperty())); 

     //Bindings Item 
     final BooleanBinding noItemSelectedI = Bindings.isNull(
      tableViewItem.getSelectionModel().selectedItemProperty()); 

     //Bindings Budget 
     final BooleanBinding noItemSelectedB = Bindings.isNull(
      tableViewBudget.getSelectionModel().selectedItemProperty()); 
     final BooleanBinding emptyBudget = Bindings.isEmpty(tableViewBudget.getItems()); 

     //Disable buttons 
     bAccept.disableProperty().bind(noFiltOp); 
     bCancel.disableProperty().bind(noCancel); 
     bAdd.disableProperty().bind(noItemSelectedI); 
     bRemove.disableProperty().bind(noItemSelectedB); 
     bClear.disableProperty().bind(emptyBudget); 
    } 

    @FXML 
    private void onSelect(ActionEvent event) { 
     mCategory.setText(((MenuItem) event.getSource()).getText()); 
    } 

    @FXML 
    private void onAccept(ActionEvent event) { 
     Category op = Product.Category.POWER_SUPPLY; 
     switch(mCategory.getText()) { 
      case "Placas Base": op = Product.Category.MOTHERBOARD; break; 
      case "Procesadores": op = Product.Category.CPU; break; 
      case "Memorias RAM": op = Product.Category.RAM; break; 
      case "Tarjetas gráficas": op = Product.Category.GPU; break; 
      case "HDD": op = Product.Category.HDD; break; 
      case "SSD": op = Product.Category.HDD_SSD; break; 
      case "Torres": op = Product.Category.CASE; break; 
      case "Teclados": op = Product.Category.KEYBOARD; break; 
      case "Ratones": op = Product.Category.MOUSE; break; 
      case "Monitores": op = Product.Category.SCREEN; break; 
      case "Altavoces": op = Product.Category.SPEAKER; break; 
      case "Multilectores": op = Product.Category.MULTIREADER; break; 
      case "Grabadoras": op = Product.Category.DVD_WRITER; break; 
      case "Ventiladores": op = Product.Category.FAN; break; 
     } 

     //Condiciones (true) para metodos Database 
     final boolean cat = !mCategory.getText().equals("Categoría"), 
         des = !tFName.getText().isEmpty(), 
         min = !tFMin.getText().isEmpty(), 
         max = !tFMax.getText().isEmpty(); 

     if(cat && des && min && max) 
      tableViewItem.getItems().setAll(
       Database.getProductByCategoryDescriptionAndPrice(
        op, tFName.getText(), Double.parseDouble(tFMin.getText()), 
        Double.parseDouble(tFMax.getText()), true)); 
     else if(cat && min && max) 
      tableViewItem.getItems().setAll(
       Database.getProductByCategoryAndPrice(
        op, Double.parseDouble(tFMin.getText()), 
        Double.parseDouble(tFMax.getText()), true)); 
     else if(cat && des) 
      tableViewItem.getItems().setAll(
       Database.getProductByCategoryAndDescription(
        op, tFName.getText(), true)); 
     else tableViewItem.getItems().setAll(Database.getProductByCategory(op)); 
    } 

    @FXML 
    private void onCancel(ActionEvent event) { 
     tFName.clear(); 
     mCategory.setText("Categoría"); 
     tFMin.clear(); 
     tFMax.clear(); 
     tableViewItem.getItems().clear(); 
    } 

    @FXML 
    private void onAdd(ActionEvent event) { 
     Product prod = 
      ((Product) tableViewItem.getSelectionModel().selectedItemProperty().getValue());  
     if(!budgetData.isEmpty()) { 
      Product[] elArray = new Product[budgetData.size()]; 
      elArray = budgetData.toArray(elArray); 
      Category cat = prod.getCategory(); 
      try { 
       int i = 0; 
       while(!elArray[i].getCategory().equals(cat)) i++; 
      } catch(ArrayIndexOutOfBoundsException e) { 
       budgetData.add(prod); 
      } 
     } else budgetData.add(prod); 
    } 

    @FXML 
    private void onRemove(ActionEvent event) { 
     budgetData.remove(tableViewBudget.getSelectionModel().getSelectedIndex()); 
    } 

    @FXML 
    private void onClear(ActionEvent event) { 
     tableViewBudget.getItems().clear(); 
    } 
} 

Ich versuche, eine Menge Dinge, aber immer ein ClassCastException zwischen Product wirft und Producto (Product kann nicht auf Producto gegossen werden). Also beschließe ich, die ursprüngliche Controller-Klasse zu veröffentlichen.

Produktklasse:

public class Product { 
    public enum Category { 
     SPEAKER, HDD, HDD_SSD, POWER_SUPPLY, DVD_WRITER, RAM, SCREEN, 
     MULTIREADER, MOTHERBOARD, CPU, MOUSE, GPU, KEYBOARD, CASE, FAN 
    } 

    public Product(String description, double price, int stock, Category category) { 
     this.description = description; 
     this.price = price; 
     this.stock = stock; 
     this.category = category; 
    } 

    public Category getCategory() { 
     return category; 
    } 

    public String getDescription() { 
     return description; 
    } 

    public double getPrice() { 
     return price; 
    } 

    public int getStock() { 
     return stock; 
    } 

    private final String description; 
    private final double price; 
    private final int stock; 
    private final Category category; 
} 

Producto Klasse:

public class Producto extends Product { 
    private int cantidad; 

    public Producto(String description, double price, int stock, Category category) { 
     super(description, price, stock, category); 
     this.cantidad = 1; 
    } 

    public int getCantidad() { 
     return cantidad; 
    } 

    public void setCantidad(int i) { 
     cantidad = i; 
    } 
} 

FXML Code:

<?xml version="1.0" encoding="UTF-8"?> 

<?import javafx.geometry.Insets?> 
<?import javafx.scene.control.Accordion?> 
<?import javafx.scene.control.Button?> 
<?import javafx.scene.control.Label?> 
<?import javafx.scene.control.Menu?> 
<?import javafx.scene.control.MenuBar?> 
<?import javafx.scene.control.MenuButton?> 
<?import javafx.scene.control.MenuItem?> 
<?import javafx.scene.control.TableColumn?> 
<?import javafx.scene.control.TableView?> 
<?import javafx.scene.control.TextField?> 
<?import javafx.scene.control.TitledPane?> 
<?import javafx.scene.layout.HBox?> 
<?import javafx.scene.layout.VBox?> 
<?import javafx.scene.text.Font?> 

<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.65" xmlns:fx="http://javafx.com/fxml/1" fx:controller="configuradordepc.controller.ControladorView"> 
    <children> 
     <MenuBar> 
     <menus> 
      <Menu mnemonicParsing="false" text="Archivo"> 
       <items> 
        <MenuItem fx:id="mNew" mnemonicParsing="false" text="Nuevo" /> 
        <MenuItem fx:id="mOpen" mnemonicParsing="false" text="Abrir" /> 
        <MenuItem fx:id="mSave" mnemonicParsing="false" text="Guardar" /> 
        <MenuItem fx:id="mPrint" mnemonicParsing="false" text="Imprimir" /> 
       </items> 
      </Menu> 
     </menus> 
     </MenuBar> 
     <Accordion VBox.vgrow="ALWAYS"> 
     <panes> 
      <TitledPane animated="false" text="Nuevo PC"> 
       <content> 
        <VBox fx:id="vBox" spacing="10.0"> 
        <children> 
         <HBox spacing="10.0" VBox.vgrow="ALWAYS"> 
          <children> 
           <VBox alignment="TOP_CENTER" spacing="10.0"> 
           <children> 
            <Label text="Filtrar Productos"> 
             <font> 
              <Font name="System Bold" size="12.0" /> 
             </font> 
            </Label> 
            <HBox alignment="CENTER"> 
             <children> 
              <Label prefWidth="87.0" text="Nombre" /> 
              <TextField fx:id="tFName" HBox.hgrow="ALWAYS" /> 
             </children> 
            </HBox> 
            <MenuButton fx:id="mCategory" maxWidth="1.7976931348623157E308" mnemonicParsing="false" text="Categoría"> 
             <items> 
              <MenuItem fx:id="mMother" mnemonicParsing="false" onAction="#onSelect" text="Placas base" /> 
              <MenuItem fx:id="mCPU" mnemonicParsing="false" onAction="#onSelect" text="Procesadores" /> 
              <MenuItem fx:id="mRAM" mnemonicParsing="false" onAction="#onSelect" text="Memorias RAM" /> 
              <MenuItem fx:id="mGPU" mnemonicParsing="false" onAction="#onSelect" text="Tarjetas gráficas" /> 
              <MenuItem fx:id="mHDD" mnemonicParsing="false" onAction="#onSelect" text="HDD" /> 
              <MenuItem fx:id="mSSD" mnemonicParsing="false" onAction="#onSelect" text="SSD" /> 
              <MenuItem fx:id="mCase" mnemonicParsing="false" onAction="#onSelect" text="Torres" /> 
              <MenuItem fx:id="mKey" mnemonicParsing="false" onAction="#onSelect" text="Teclados" /> 
              <MenuItem fx:id="mMouse" mnemonicParsing="false" onAction="#onSelect" text="Ratones" /> 
              <MenuItem fx:id="mScreen" mnemonicParsing="false" onAction="#onSelect" text="Monitores" /> 
              <MenuItem fx:id="mSpeak" mnemonicParsing="false" onAction="#onSelect" text="Altavoces" /> 
              <MenuItem fx:id="mMulti" mnemonicParsing="false" onAction="#onSelect" text="Multilectores" /> 
              <MenuItem fx:id="mDVD" mnemonicParsing="false" onAction="#onSelect" text="Grabadoras" /> 
              <MenuItem fx:id="mFan" mnemonicParsing="false" onAction="#onSelect" text="Ventiladores" /> 
              <MenuItem fx:id="mPower" mnemonicParsing="false" onAction="#onSelect" text="Fuentes de alimentación" /> 
             </items> 
            </MenuButton> 
            <HBox alignment="CENTER_LEFT"> 
             <children> 
              <Label prefWidth="87.0" text="Precio Mín." /> 
              <TextField fx:id="tFMin" HBox.hgrow="ALWAYS" /> 
             </children> 
            </HBox> 
            <HBox alignment="CENTER_LEFT"> 
             <children> 
              <Label prefWidth="87.0" text="Precio Máx." /> 
              <TextField fx:id="tFMax" HBox.hgrow="ALWAYS" /> 
             </children> 
            </HBox> 
            <HBox alignment="CENTER" spacing="10.0"> 
             <children> 
              <Button fx:id="bAccept" mnemonicParsing="false" onAction="#onAccept" text="Aceptar" /> 
              <Button fx:id="bCancel" mnemonicParsing="false" onAction="#onCancel" text="Cancelar" /> 
             </children> 
            </HBox> 
           </children> 
           <HBox.margin> 
            <Insets top="4.0" /> 
           </HBox.margin> 
           </VBox> 
           <VBox alignment="CENTER" spacing="10.0" HBox.hgrow="ALWAYS"> 
           <HBox.margin> 
            <Insets /> 
           </HBox.margin> 
           <children> 
            <TableView fx:id="tableViewItem" VBox.vgrow="ALWAYS"> 
             <columns> 
              <TableColumn editable="false" prefWidth="75.0" sortable="false" text="Productos"> 
              <columns> 
               <TableColumn fx:id="nameItemColumn" editable="false" prefWidth="75.0" sortable="false" text="Nombre" /> 
               <TableColumn fx:id="priceColumn" editable="false" prefWidth="75.0" sortable="false" text="Precio" /> 
               <TableColumn fx:id="availableColumn" editable="false" prefWidth="75.0" sortable="false" text="Disponibilidad" /> 
              </columns> 
              </TableColumn> 
             </columns> 
             <columnResizePolicy> 
              <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" /> 
             </columnResizePolicy> 
            </TableView> 
            <Button fx:id="bAdd" mnemonicParsing="false" onAction="#onAdd" text="Añadir" /> 
           </children> 
           </VBox> 
           <VBox spacing="10.0" HBox.hgrow="ALWAYS"> 
           <children> 
            <TableView fx:id="tableViewBudget" editable="true" VBox.vgrow="ALWAYS"> 
             <columns> 
              <TableColumn prefWidth="75.0" sortable="false" text="Presupuesto"> 
              <columns> 
               <TableColumn fx:id="nameBudgetColumn" editable="false" prefWidth="75.0" sortable="false" text="Nombre" /> 
               <TableColumn fx:id="outTaxColumn" editable="false" prefWidth="75.0" sortable="false" text="Sin IVA" /> 
               <TableColumn fx:id="inTaxColumn" editable="false" prefWidth="75.0" sortable="false" text="Con IVA" /> 
               <TableColumn fx:id="quantityColumn" prefWidth="75.0" sortable="false" text="Cantidad" /> 
              </columns> 
              </TableColumn> 
             </columns> 
             <columnResizePolicy> 
              <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" /> 
             </columnResizePolicy> 
            </TableView> 
            <HBox alignment="CENTER" spacing="10.0"> 
             <children> 
              <Button fx:id="bRemove" mnemonicParsing="false" onAction="#onRemove" text="Eliminar" /> 
              <Button fx:id="bClear" mnemonicParsing="false" onAction="#onClear" text="Limpiar" /> 
             </children> 
            </HBox> 
           </children> 
           </VBox> 
          </children> 
         </HBox> 
        </children> 
        <padding> 
         <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" /> 
        </padding> 
        </VBox> 
       </content> 
      </TitledPane> 
      <TitledPane animated="false" text="Configuraciones" /> 
     </panes> 
     </Accordion> 
    </children> 
</VBox> 

Answer 1

Sie können die Mengen mit einem Map<Product, ObjectProperty<Integer>> speichern.

final int defaultValue = 0; 

Map<StringItem, ObjectProperty<Integer>> map = new HashMap<>(); 

// fill map with existing keys 
budgetData.forEach(i -> map.put(i, new SimpleObjectProperty(defaultValue))); 

// update map on change of list 
budgetData.addListener((ListChangeListener.Change<? extends StringItem> c) -> { 
    while (c.next()) { 
     c.getRemoved().forEach(map::remove); 
     c.getAddedSubList().forEach(i -> map.put(i, new SimpleObjectProperty(defaultValue))); 
    } 
}); 

// use value in map as value for column 
quantityColumn.setCellValueFactory(d -> map.get(d.getValue())); 
quantityColumn.setCellFactory(TextFieldTableCell.forTableColumn(new IntegerStringConverter())); 

Beachten Sie, dass diese alle Elemente in der Liste erfordert in Bezug auf equals paarweise verschieden zu sein. Wenn diese Bedingung nicht erfüllt ist, müssen Sie einen eindeutigen Schlüssel als Positionstyp für die TableView und assoziieren Menge und Original-Element es in der Karte eingeben.

Answer 2

Sie müssen die Zellfabrik verwenden, das zu erreichen:

nameBudgetColumn.setCellFactory(tc -> new TextFieldTableCell<>());