java - java.lang.UnsupportedOperationException JavaFX ArrayListObservableListへ

Question

Java FX で問題が発生しています。現在、オブジェクトをシリアライズしようとしています。そのために、オブジェクトを javaFX からシリアライズ可能なオブジェクトに変換するクラスを作成しています。しかし、オブジェクトをロードバックしようとすると、

  Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.control.MenuItem.fire(MenuItem.java:462)
at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.doSelect(ContextMenuContent.java:1405)
at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.lambda$createChildren$343(ContextMenuContent.java:1358)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:380)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:294)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:416)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:415)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.reflect.misc.Trampoline.invoke(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1771)
    ... 43 more


 Caused by: java.lang.UnsupportedOperationException
    at java.util.AbstractList.add(Unknown Source)
    at java.util.AbstractList.add(Unknown Source)
    at view.OverviewInterroController.handleLoad(OverviewInterroController.java:172)
    ... 53 more

それを引き起こすコード：

package model;

import java.io.Serializable;
import java.util.ArrayList;

import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;

public class QuestionSerializable implements Serializable {

    private final String question;
    private final String typeReponse;
    private final int nbLignesReponse;
    private final ArrayList<String> reponseData = new ArrayList<String>();


    public QuestionSerializable(QuestionModel model)
    {
        this.question = model.getQuestion().getValue();
        this.typeReponse = model.getTypeReponse().getValue();
        this.nbLignesReponse = model.getNbLignesReponse().getValue();
        for(StringProperty val : model.getReponseData().getValue())
        {
            reponseData.add(val.getValue());
        }
    }

    public QuestionModel convert()
    {
        QuestionModel qm = new QuestionModel(question);
        qm.getNbLignesReponse().setValue(this.nbLignesReponse);
        qm.getTypeReponse().setValue(typeReponse);
        ObjectProperty<ObservableList<StringProperty>> reponseData2 =qm.getReponseData();
        for(String val : reponseData)
        {
            reponseData2.getValue().add(new SimpleStringProperty(val));
        }
        return qm;
    }
}

そして特に：

ObjectProperty<ObservableList<StringProperty>> reponseData2 =qm.getReponseData();
for(String val : reponseData)
{
    reponseData2.getValue().add(new SimpleStringProperty(val));
}

そしてOverviewController

package view;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

import com.itextpdf.text.xml.simpleparser.handler.NeverNewLineHandler;

import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Label;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.FileChooser;
import model.QuestionModel;
import model.QuestionSerializable;
import principale.Main;

public class OverviewInterroController {

    @FXML
    private TableView<QuestionModel> questionTable;
    @FXML
    private TableColumn<QuestionModel,String> questionColumn; 
    @FXML
    private Label questionLabel;
    @FXML
    private Label typeLabel;
    @FXML
    private Label nbLigneLabel;
    @FXML
    private TableView<StringProperty> reponseTable;
    @FXML
    private TableColumn<ObservableList<StringProperty>,String> reponseColumn;

    // Reference to the main application.
    private Main mainApp;

    @FXML
    private void initialize()
    {
        questionColumn.setCellValueFactory(cellData -> cellData.getValue().getQuestion());
        showQuestionDetails(null);

        questionTable.getSelectionModel().selectedItemProperty().addListener(
                (observable,oldvalue,newValue)-> showQuestionDetails(newValue));
    }

    public void showReponseTable(QuestionModel question)
    {
        if(question.getTypeReponse().getValue().equals("Cocher"))
        {
            reponseTable.setItems(question.getReponseData().getValue());
            reponseColumn.setCellValueFactory(new PropertyValueFactory<>("value"));
            reponseTable.setVisible(true);
        }else
        {
            this.reponseTable.setVisible(false);
        }
    }

    public void setMainApp(Main mainApp) {
        this.mainApp = mainApp;
        questionTable.setItems(mainApp.getQuestionData());
    }


    public void handleImprimer()
    {
        mainApp.showImprimerDialog();
    }

    public void handleClose()
    {
        System.exit(0);
    }


    public void showQuestionDetails(QuestionModel question)
    {
        if(question != null)
        {
            questionLabel.setText(question.getQuestion().getValue());
            typeLabel.setText(question.getTypeReponse().getValue());
            nbLigneLabel.setText(Integer.toString(question.getNbLignesReponse().getValue()));
            reponseTable.setItems(FXCollections.emptyObservableList());
            showReponseTable(question);
        }else
        {
            questionLabel.setText("");
            typeLabel.setText("");
            nbLigneLabel.setText("0");
            reponseTable.setVisible(false);
        }
    }



    public void handleDelete()
    {
        int selectedIndex = questionTable.getSelectionModel().getSelectedIndex();
        if(selectedIndex>=0)
        {
        questionTable.getItems().remove(selectedIndex);
        }else
        {
            Alert alert = new Alert(AlertType.ERROR);
            alert.initOwner(mainApp.getPrimaryStage());
            alert.setTitle("Aucune question séléctionnée !");
            alert.setContentText("Veuillez séléctionner une question valide !");

            alert.showAndWait();
        }
    }

    public void handleSave() throws IOException
    {
        FileChooser fileChooser = new FileChooser();

        //Set extension filter
        FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("CTRL Files (*.ctrl)", "*.ctrl");
        fileChooser.getExtensionFilters().add(extFilter);

        //Show save file dialog
        File file = fileChooser.showSaveDialog(this.mainApp.getPrimaryStage());

        if(file != null){
            FileOutputStream fout = new FileOutputStream(file);
            ObjectOutputStream oos = new ObjectOutputStream(fout);
            ArrayList<QuestionSerializable> qs = new ArrayList<QuestionSerializable>();
            for(QuestionModel qm : this.mainApp.getQuestionData())
            {
                qs.add( new QuestionSerializable(qm));
            }

            oos.writeObject(new ArrayList<QuestionModel>(this.mainApp.getQuestionData()));
            oos.close();
            fout.close();
        }
    }

    @SuppressWarnings("unchecked")
    public void handleLoad() throws Exception
    {
        FileChooser fileChooser = new FileChooser();

        //Set extension filter
        FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("CTRL Files (*.ctrl)", "*.ctrl");
        fileChooser.getExtensionFilters().add(extFilter);

        //Show save file dialog
        File file = fileChooser.showSaveDialog(this.mainApp.getPrimaryStage());

        if(file != null){
            FileInputStream fout = new FileInputStream(file);
            ObjectInputStream oos = new ObjectInputStream(fout);
            ArrayList<QuestionSerializable> qm = (ArrayList<QuestionSerializable>) oos.readObject();
            ObservableList<QuestionModel> qo = FXCollections.emptyObservableList();
            for(QuestionSerializable q : qm)
            {
                qo.add(q.convert());
            }
            this.mainApp.setQuestionData(qo);
            this.questionTable.refresh();
            this.showQuestionDetails(null);
            oos.close();
            fout.close();
        }
    }

    public void handleNew()
    {
        QuestionModel tempQuestion = new QuestionModel("");
        tempQuestion.getReponseData().getValue().add(new SimpleStringProperty(""));
        boolean okClicked = mainApp.showPersonEditDialog(tempQuestion);
        if (okClicked) {
            mainApp.getQuestionData().add(tempQuestion);
        }

    }

    public void handleEdit()
    {
        QuestionModel selectedQuestion = questionTable.getSelectionModel().getSelectedItem();
        if(selectedQuestion!=null)
        {
            boolean okClicked = mainApp.showPersonEditDialog(selectedQuestion);
            if (okClicked) {
                showQuestionDetails(selectedQuestion);
                this.reponseTable.refresh();
            }
        }else
        {
            Alert alert = new Alert(AlertType.ERROR);
            alert.initOwner(mainApp.getPrimaryStage());
            alert.setTitle("Aucune question séléctionnée !");
            alert.setContentText("Veuillez séléctionner une question valide !");

            alert.showAndWait();
        }
    }

}

172行目は次のとおりです。

ObservableList<QuestionModel> qo = FXCollections.emptyObservableList();
for(QuestionSerializable q : qm)
{
    qo.add(q.convert());
}

QuestionModelClass :

package model;

import java.io.Serializable;

import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;

public class QuestionModel{

    private final StringProperty question;
    private final StringProperty typeReponse = new SimpleStringProperty("Remplir Ligne");
    private final IntegerProperty nbLignesReponse = new SimpleIntegerProperty(1);
    private ObjectProperty<ObservableList<StringProperty>> reponseData = new SimpleObjectProperty<ObservableList<StringProperty>>(FXCollections.observableArrayList());



    /**
     * @return the reponseData
     */
    public ObjectProperty<ObservableList<StringProperty>> getReponseData() {
        return reponseData;
    }

    public void setReponseData(ObjectProperty<ObservableList<StringProperty>> reponseData)
    {
        this.reponseData = reponseData;
    }

    public QuestionModel(String question)
    {
        this.question = new SimpleStringProperty(question);
    }

    /**
     * @return the nbLignesReponse
     */
    public IntegerProperty getNbLignesReponse() {
        return nbLignesReponse;
    }

    /**
     * @return the question
     */
    public StringProperty getQuestion() {
        return question;
    }

    /**
     * @return the typeReponse
     */
    public StringProperty getTypeReponse() {
        return typeReponse;
    }
}

score 13 · Accepted Answer

FXCollections.emptyObservableList()は変更不可能な empty を返します。これが、を呼び出したときにObservableListを取得する理由です。UnsupportedOperationExceptionadd

FXCollections.observableArrayList()代わりにリストを作成するために使用します。

ObservableList<QuestionModel> qo = FXCollections.observableArrayList();

これにより、変更可能なリストが作成されます。このリストは最初は空です。

score 1 · Accepted Answer

どうやらreponseDataandqm.getReponseData().getValue()はの型を持つべきですObjectProperty<List<StringProperty>>。

FXCollectionsのドキュメントでは、メソッドが

FXCollections.emptyObservableList()

「変更不可能な空のリスト」を返します。

したがって、ループ

for(QuestionSerializable q : qm)
{
    qo.add(q.convert());
}

オブジェクトは前述のメソッドを呼び出すことによって作成されるUnsupportedOperationExceptionため、がスローされます。qo

変更可能な空のリストを取得するには、メソッド

FXCollections.observableArrayList()

上記のドキュメントとfabianの以前の回答に従って、呼び出す必要があります。

java - java.lang.UnsupportedOperationException JavaFX ArrayListObservableListへ

2 に答える 2

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