DefaultListModel & JTable; how to sync the items in the DefaultListModel

Question

I have a jtable with items in it
example
name date age
Peter 01-jan-43 62
Ron 03-nov-73 32
when double clicking the name( eg peter), a new window pops up contains all relevent info of the user.
I added a sorter and when sorting the table it comes in the correct-wanted order, however, when double clicking the item - the wrong window pops up.
I take it the DefaultListModel is not synchronized with the tables elements.
Q: how to correct the DefaultListModel once the table has been sorted so it will be in sync with the jtable.
thanks
peter

Answer 1

thank you camicker for replying.
I have been trying for the past 4 hours to dig in the code (as well as google) to find where to implement a sync with the DefaultListModel. Nothing.
any input?
package com.shared.model;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;
public class TableSorter extends AbstractTableModel
    protected TableModel tableModel;
    public static final int DESCENDING = -1;
    public static final int NOT_SORTED = 0;
    public static final int ASCENDING = 1;
    private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
    public static final Comparator COMPARABLE_COMAPRATOR = new Comparator()
        public int compare(Object o1, Object o2)
            return ((Comparable) o1).compareTo(o2);
    public static final Comparator LEXICAL_COMPARATOR = new Comparator()
        public int compare(Object o1, Object o2)
            return o1.toString().compareTo(o2.toString());
    private Row[] viewToModel;
    private int[] modelToView;
    private JTableHeader tableHeader;
    private MouseListener mouseListener;
    private TableModelListener tableModelListener;
    private Map columnComparators = new HashMap();
    private List sortingColumns = new ArrayList();
    public TableSorter()
        this.mouseListener = new MouseHandler();
        this.tableModelListener = new TableModelHandler();
    public TableSorter(TableModel tableModel)
        this();
        setTableModel(tableModel);
    public TableSorter(TableModel tableModel, JTableHeader tableHeader)
        this();
        setTableHeader(tableHeader);
        setTableModel(tableModel);
    private void clearSortingState()
        viewToModel = null;
        modelToView = null;
    public TableModel getTableModel()
        return tableModel;
    public void setTableModel(TableModel tableModel)
        if (this.tableModel != null)
            this.tableModel.removeTableModelListener(tableModelListener);
        this.tableModel = tableModel;
        if (this.tableModel != null)
            this.tableModel.addTableModelListener(tableModelListener);
        clearSortingState();
        fireTableStructureChanged();
    public JTableHeader getTableHeader()
        return tableHeader;
    public void setTableHeader(JTableHeader tableHeader)
        if (this.tableHeader != null)
            this.tableHeader.removeMouseListener(mouseListener);
            TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
            if (defaultRenderer instanceof SortableHeaderRenderer)
                this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
        this.tableHeader = tableHeader;
        if (this.tableHeader != null)
            this.tableHeader.addMouseListener(mouseListener);
            this.tableHeader.setDefaultRenderer
                    new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer())
    public boolean isSorting()
        return sortingColumns.size() != 0;
    private Directive getDirective(int column)
        for (int i = 0; i < sortingColumns.size(); i++)
            Directive directive = (Directive)sortingColumns.get(i);
            if (directive.column == column)
                return directive;
        return EMPTY_DIRECTIVE;
    public int getSortingStatus(int column)
        return getDirective(column).direction;
    private void sortingStatusChanged()
        clearSortingState();
        fireTableDataChanged();
        if (tableHeader != null)
            tableHeader.repaint();
    public void setSortingStatus(int column, int status)
        Directive directive = getDirective(column);
        if (directive != EMPTY_DIRECTIVE)
            sortingColumns.remove(directive);
        if (status != NOT_SORTED)
            sortingColumns.add(new Directive(column, status));
        sortingStatusChanged();
    protected Icon getHeaderRendererIcon(int column, int size)
        Directive directive = getDirective(column);
        if (directive == EMPTY_DIRECTIVE)
            return null;
        return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
    private void cancelSorting()
        sortingColumns.clear();
        sortingStatusChanged();
    public void setColumnComparator(Class type, Comparator comparator)
        if (comparator == null)
            columnComparators.remove(type);
        else
            columnComparators.put(type, comparator);
    protected Comparator getComparator(int column)
        Class columnType = tableModel.getColumnClass(column);
        Comparator comparator = (Comparator) columnComparators.get(columnType);
        if (comparator != null)
            return comparator;
        if (Comparable.class.isAssignableFrom(columnType))
            return COMPARABLE_COMAPRATOR;
        return LEXICAL_COMPARATOR;
    private Row[] getViewToModel()
        if (viewToModel == null)
            int tableModelRowCount = tableModel.getRowCount();
            viewToModel = new Row[tableModelRowCount];
            for (int row = 0; row < tableModelRowCount; row++)
                viewToModel[row] = new Row(row);
            if (isSorting())
                Arrays.sort(viewToModel);
        return viewToModel;
    public int modelIndex(int viewIndex)
        return getViewToModel()[viewIndex].modelIndex;
    private int[] getModelToView()
        if (modelToView == null)
            int n = getViewToModel().length;
            modelToView = new int[n];
            for (int i = 0; i < n; i++)
                modelToView[modelIndex(i)] = i;
        return modelToView;
    // TableModel interface methods
    public int getRowCount()
        return (tableModel == null) ? 0 : tableModel.getRowCount();
    public int getColumnCount()
        return (tableModel == null) ? 0 : tableModel.getColumnCount();
    public String getColumnName(int column)
        return tableModel.getColumnName(column);
    public Class getColumnClass(int column)
        return tableModel.getColumnClass(column);
    public boolean isCellEditable(int row, int column)
        return tableModel.isCellEditable(modelIndex(row), column);
    public Object getValueAt(int row, int column)
        return tableModel.getValueAt(modelIndex(row), column);
    public void setValueAt(Object aValue, int row, int column)
        tableModel.setValueAt(aValue, modelIndex(row), column);
    // Helper classes
    private class Row implements Comparable
        private int modelIndex;
        public Row(int index)
            this.modelIndex = index;
        public int compareTo(Object o)
            int row1 = modelIndex;
            int row2 = ((Row) o).modelIndex;
            for (Iterator it = sortingColumns.iterator(); it.hasNext();)
                Directive directive = (Directive) it.next();
                int column = directive.column;
                Object o1 = tableModel.getValueAt(row1, column);
                Object o2 = tableModel.getValueAt(row2, column);
                int comparison = 0;
                // Define null less than everything, except null.
                if (o1 == null && o2 == null)
                    comparison = 0;
                } else if (o1 == null)
                    comparison = -1;
                } else if (o2 == null)
                    comparison = 1;
                } else {
                    comparison = getComparator(column).compare(o1, o2);
                if (comparison != 0)
                    return directive.direction == DESCENDING ? -comparison : comparison;
            return 0;
    private class TableModelHandler implements TableModelListener
        public void tableChanged(TableModelEvent e)
            // If we're not sorting by anything, just pass the event along.            
            if (!isSorting())
                clearSortingState();
                fireTableChanged(e);
                return;
            // If the table structure has changed, cancel the sorting; the            
            // sorting columns may have been either moved or deleted from            
            // the model.
            if (e.getFirstRow() == TableModelEvent.HEADER_ROW)
                cancelSorting();
                fireTableChanged(e);
                return;
            // We can map a cell event through to the view without widening            
            // when the following conditions apply:
            // a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and,
            // b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
            // c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and,
            // d) a reverse lookup will not trigger a sort (modelToView != null)
            // Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
            // The last check, for (modelToView != null) is to see if modelToView
            // is already allocated. If we don't do this check; sorting can become
            // a performance bottleneck for applications where cells 
            // change rapidly in different parts of the table. If cells
            // change alternately in the sorting column and then outside of            
            // it this class can end up re-sorting on alternate cell updates -
            // which can be a performance problem for large tables. The last
            // clause avoids this problem.
            int column = e.getColumn();
            if (e.getFirstRow() == e.getLastRow()
                    && column != TableModelEvent.ALL_COLUMNS
                    && getSortingStatus(column) == NOT_SORTED
                    && modelToView != null)
                int viewIndex = getModelToView()[e.getFirstRow()];
                fireTableChanged(new TableModelEvent(TableSorter.this,
                                                     viewIndex, viewIndex,
                                                     column, e.getType()));
                return;
            // Something has happened to the data that may have invalidated the row order.
            clearSortingState();
            fireTableDataChanged();
            return;
    private class MouseHandler extends MouseAdapter
        public void mouseClicked(MouseEvent e)
            JTableHeader h = (JTableHeader) e.getSource();
            TableColumnModel columnModel = h.getColumnModel();
            int viewColumn = columnModel.getColumnIndexAtX(e.getX());
            int column = columnModel.getColumn(viewColumn).getModelIndex();
            if (column != -1)
                int status = getSortingStatus(column);
                if (!e.isControlDown())
                    cancelSorting();
                // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
                // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
                status = status + (e.isShiftDown() ? -1 : 1);
                status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
                setSortingStatus(column, status);
    private static class Arrow implements Icon
        private boolean descending;
        private int size;
        private int priority;
        public Arrow(boolean descending, int size, int priority)
            this.descending = descending;
            this.size = size;
            this.priority = priority;
        public void paintIcon(Component c, Graphics g, int x, int y)
            Color color = c == null ? Color.GRAY : c.getBackground();            
            // In a compound sort, make each succesive triangle 20%
            // smaller than the previous one.
            int dx = (int)(size/2*Math.pow(0.8, priority));
            int dy = descending ? dx : -dx;
            // Align icon (roughly) with font baseline.
            y = y + 5*size/6 + (descending ? -dy : 0);
            int shift = descending ? 1 : -1;
            g.translate(x, y);
            // Right diagonal.
            g.setColor(color.darker());
            g.drawLine(dx / 2, dy, 0, 0);
            g.drawLine(dx / 2, dy + shift, 0, shift);
            // Left diagonal.
            g.setColor(color.brighter());
            g.drawLine(dx / 2, dy, dx, 0);
            g.drawLine(dx / 2, dy + shift, dx, shift);
            // Horizontal line.
            if (descending) {
                g.setColor(color.darker().darker());
            } else {
                g.setColor(color.brighter().brighter());
            g.drawLine(dx, 0, 0, 0);
            g.setColor(color);
            g.translate(-x, -y);
        public int getIconWidth()
            return size;
        public int getIconHeight()
            return size;
    private class SortableHeaderRenderer implements TableCellRenderer
        private TableCellRenderer tableCellRenderer;
        public SortableHeaderRenderer(TableCellRenderer tableCellRenderer)
            this.tableCellRenderer = tableCellRenderer;
        public Component getTableCellRendererComponent(JTable table,
                                                       Object value,
                                                       boolean isSelected,
                                                       boolean hasFocus,
                                                       int row,
                                                       int column)
            Component c = tableCellRenderer.getTableCellRendererComponent(table,
                    value, isSelected, hasFocus, row, column);
            if (c instanceof JLabel) {
                JLabel l = (JLabel) c;
                l.setHorizontalTextPosition(JLabel.LEFT);
                int modelColumn = table.convertColumnIndexToModel(column);
                l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
            return c;
    private static class Directive
        private int column;
        private int direction;
        public Directive(int column, int direction)
            this.column = column;
            this.direction = direction;
}