DeafaultTableModel in XML Hilfe

[Nck256]

Hallo,
Ich bekomme es einfach nicht hin, mein JTable Model in eine XML-Datei zu sichern. Beim shcreiben gibt es folgende Exception:

java.lang.InstantiationException: table.test.Entry
Continuing ...
java.lang.Exception: XMLEncoder: discarding statement Vector.add(Entry);
Continuing ...
java.lang.InstantiationException: table.test.Entry
Continuing ...
java.lang.Exception: XMLEncoder: discarding statement Vector.add(Entry);
Continuing ...

Beim Laden gibts dann auch noch Fehler wegen der korrupten XML-Datei. Hier der Code:

ColumnModel

package table.test;

import java.util.Vector;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.TableColumn;

public class ColumnModel extends DefaultTableColumnModel{
    private Object[] columnData = new Object[]{
        "Name", 100, //column 1: header value, width
        "Art", 50,  //column 2: header value, width
        "Installiert", 50,  //column 3: header value, width
    };

    public ColumnModel() {
        for (int i = 0; i < columnData.length; i += 2) {
            String title = (String) columnData[i];
            Integer width = (Integer) columnData[i + 1];
            TableColumn tableColumn = new TableColumn(i / 2, width);
            tableColumn.setHeaderValue(title);
            addColumn(tableColumn);
        }
    }

    public Vector<TableColumn> getTableColumns() {
        return tableColumns;
    }

    public void setTableColumns(Vector<TableColumn> tableColumns) {
        this.tableColumns = tableColumns;
    }
}

TableModel

package table.test;

import java.util.Vector;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Nick
 */
public final class TableModel extends DefaultTableModel {
    
    private Vector<Entry> data = null;
    private Vector listeners = new Vector();
    
    public TableModel() {
        super(0, 4);
    }
    
    public void addMod(Entry ent) {
        int index = data.size();
        data.add(ent);
        
         TableModelEvent e = new TableModelEvent( this, index, index, 
	     TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT );
 
         // Nun das Event verschicken
	 for( int i = 0, n = listeners.size(); i<n; i++ ){
             ((TableModelListener)listeners.get( i )).tableChanged( e );
         }
    }
    
    public void removeRow(int row) {
        data.remove(row);
        fireTableRowsDeleted(row, row);
    }
    
    public void setRowCount(int i) {
        getData().setSize(i);
    }

    
    public Vector<Entry> getData() {
        if (data == null) {
            data = new Vector<Entry>();
        }
        return data;
    }
    
    @Override
    public String getColumnName(int col) {
        switch(col) {
        case 0:
            return "Name";
        case 1:
            return "Art";
        case 2:
            return "Status";
        default:
            return null;
        }
    }
    
    @Override
    public int getColumnCount() {
        return 3;
    }
    
    @Override
    public int getRowCount() {
        return getData().size();
    }
    
    
    public Object getValueAt(int row, int col) {
        Entry p = data.elementAt(row);
	
        switch (col) {
        case 0:
            return p.getName();
        case 1:
            return p.getType();
        case 2:
            return p.getStatus();
        default:
            return null;
        }
    }

    @Override
    public void setValueAt(Object value, int row, int col) {
        /*Mod p = data.get(row);
	
        switch (col) {
        case 0:
            p.setMod((String) value);
            break;
        case 1:
            p.setStatus((boolean) value);
            break;
        }
	
        fireTableCellUpdated(row, col);*/
    }
    
    @Override
    public void addTableModelListener(TableModelListener l) {
		listeners.add( l );
	}
    @Override
    public void removeTableModelListener(TableModelListener l) {
		listeners.remove( l );
	}
    
    @Override
    public boolean isCellEditable(int row, int col) {
        return false;
    }
    
    public void setDataVector(Vector vector){
        data = vector;
    }
    
    public Vector getColumnIdentifiers(){
        return columnIdentifiers;
    }
    
    @Override
    public Class<?> getColumnClass(int columnIndex) {
        if (columnIndex == 0) {
            return Integer.class;
        }
        return String.class;
    }
    
    @Override
    public Vector getDataVector() {
        return data;
    }
}

Entry

package table.test;

public final class Entry {
    
    private String name = null;
    private String type = null;
    private boolean status = false;
    
    public Entry(String pname, String ptype, boolean pstatus) {
        this.name = pname;
        this.status = pstatus;
        this.type = ptype;
    }

    public String getName() {
        return name;
    }

    public void setMod(String pname) {
        this.name = pname;
    }

    public boolean getStatus() {
        return status;
    }

    public void setStatus(boolean pstatus) {
        this.status = pstatus;
    }
    
    public String getType() {
        return type;
    }
    
    public void setType(String ptype) {
        this.type = ptype;
    }
    
}

MainFrame

package table.test;

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.io.*;
import javax.swing.*;

public class MainFrame extends JFrame{
    
    private JButton btAddMod = new JButton();
    private JScrollPane scpModScrollPane;
    private JTable tblModTable = new JTable();
    
    private static TableModel tableModel;
    private static ColumnModel columnModel;
    
    String modFile = "D:\\mods.xml";
    
    int i = 1;
    
    public static void main(String[]args) {
        new MainFrame().show();
    }
    
    public MainFrame() {
        setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
        setSize(400, 300);
        setLocationRelativeTo(null);
                
        btAddMod.setText("Eintrag hinzufügen");
        
        tableModel = new TableModel();
        columnModel = new ColumnModel();
        scpModScrollPane = new JScrollPane(tblModTable);
        loadTable();
        
        tblModTable.setColumnModel(columnModel);
        tblModTable.setModel(tableModel);
        tableModel.addTableModelListener(tblModTable);
        tblModTable.setShowGrid(false);
        tblModTable.setRowHeight(tblModTable.getRowHeight() + 2);
        tblModTable.setIntercellSpacing(new Dimension(0, 0));
        tblModTable.setFillsViewportHeight(true);
        tblModTable.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        
        btAddMod.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
                i++;
                addEntryToTable("Test" + i);       
            }
        });
        
        addWindowListener(new WindowAdapter() {
 
            @Override
            public void windowClosing(final WindowEvent evt) {
                saveTable();
                dispose();
            }
        });
        
       GroupLayout layout = new GroupLayout(getContentPane());
       this.setLayout(layout);
       layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(btAddMod))
                .addGap(18, 18, 18)
                .addComponent(scpModScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 120, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(240, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(btAddMod, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED))
                    .addComponent(scpModScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(17, Short.MAX_VALUE))
        );
    }
    
    public void saveTable() {
        try {
            
           XMLEncoder o = new XMLEncoder(new BufferedOutputStream(new FileOutputStream(modFile)));
           o.writeObject(columnModel);
           o.writeObject(tableModel);
           o.close();
           JOptionPane.showMessageDialog(this, "Sequence saved.");
        }
        catch(Exception e){
            System.out.println("Fehler beim Speichern");
            e.printStackTrace();
        }
    }
    
    private void loadTable() {
        try{
            XMLDecoder d = new XMLDecoder(new BufferedInputStream(new FileInputStream(modFile)));
            columnModel = (ColumnModel) d.readObject();
            tableModel = (TableModel) d.readObject();
            d.close();
            System.out.println("Geladen");
        }
        catch(Exception e){
            System.out.println("Fehler beim Laden");
            e.printStackTrace();
        }
    }
    
    private void removeEntryFromTable(String mod) {
        int pos = tblModTable.getSelectedRow();
        tableModel.removeRow(pos);
    }
    
    private void addEntryToTable(String text) {
        Entry mod = new Entry(text, "", false);
        tableModel.addMod(mod);
    }
    
}

 

[Nck256]

Hat den niemand einen Rat? Ich denke mal es liegt an meiner selbst geschriebenen Entry Klasse. Aber ich kann mir nicht vorstellen das daran was falsch ist.

 

[AquaBall]

Ist mir einfach zu komplex zum durchdenken.


Aber helfen dir ein paar Log-zeilen nicht?

 

[Nck256]

Nein. Helfen dir sie denn

Habe das jetzt über eine 3 dimensionale Arraylist gelöst. Aber wer noch helfen kann ist immer willkommen.

 

[AquaBall]

Ich meinte nicht die Zeilen aus dem Fehler-Log, sondern selber Log-Zeilen einbauen:

system.out.println("Mein Array ist jetzt so lang: "+array.length);

Dann kannst du meist auf die Zeile genau eingrenzen, wo der Fehler passiert, und die Ursache feststellen.