package com.ca.commons.cbutil;

/** 
 * In a chain of data manipulators some behaviour is common. TableMap
 * provides most of this behavour and can be subclassed by filters
 * that only need to override a handful of specific methods. TableMap 
 * implements TableModel by routing all requests to its model, and
 * TableModelListener by routing all events to its listeners. Inserting 
 * a TableMap which has not been subclassed into a chain of table filters 
 * should have no effect.
 *
 * @version 1.4 12/17/97
 * @author Philip Milne http:
 * //java.sun.com/docs/books/tutorial/uiswing/components/table.html#eg
 */

import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;

public class CBTableMap extends AbstractTableModel
        implements TableModelListener
{
    protected TableModel model;

    public TableModel getModel()
    {
        return model;
    }

    public void setModel(TableModel model)
    {
        this.model = model;
        model.addTableModelListener(this);
    }

    // By default, implement TableModel by forwarding all messages 
    // to the model. 

    public Object getValueAt(int aRow, int aColumn)
    {
        return model.getValueAt(aRow, aColumn);
    }

    public void setValueAt(Object aValue, int aRow, int aColumn)
    {
        model.setValueAt(aValue, aRow, aColumn);
    }

    public int getRowCount()
    {
        return (model == null) ? 0 : model.getRowCount();
    }

    public int getColumnCount()
    {
        return (model == null) ? 0 : model.getColumnCount();
    }

    public String getColumnName(int aColumn)
    {
        return model.getColumnName(aColumn);
    }

    public Class getColumnClass(int aColumn)
    {
        return model.getColumnClass(aColumn);
    }

    public boolean isCellEditable(int row, int column)
    {
        return model.isCellEditable(row, column);
    }
//
// Implementation of the TableModelListener interface, 
//
    // By default forward all events to all the listeners. 
    public void tableChanged(TableModelEvent e)
    {
        fireTableChanged(e);
    }
}
