Технология Enterprise Java Beans. Часть 2

public class WidgetEditClient extends JFrame implements ActionListener  
{
private static final long serialVersionUID = -7066592068515570150L;
private DefaultTableModel model;
private JTable table = null;
private Context jndiContext;
private WidgetHome home;
private JButton addButton;
public WidgetEditClient()   
	{
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	// Obtaining the beans  from the database
	try 
		{
		jndiContext = createJBossContext();
		Object ref = jndiContext.lookup("WidgetBean");
		home =   (WidgetHome)
		PortableRemoteObject.narrow(ref,  WidgetHome.class); 
		}   
	catch(NamingException e)   
		{ e.printStackTrace();
		}
	
	loadElements();
	
	JScrollPane scroll = new JScrollPane(table);
	scroll.setBorder(BorderFactory.createEmptyBorder()); 
	getContentPane().setLayout(new BorderLayout());
	
	getContentPane().add(BorderLayout.CENTER,  scroll); 
	getContentPane().add(BorderLayout.SOUTH,   addButton = new
	
	JButton("Add"));
	addButton.addActionListener(this); 
	pack();
	}
	
public void actionPerformed(ActionEvent e)   
	{ 
	JPanel panel = new JPanel(); 
	panel.setLayout(new GridBagLayout());
	GridBagConstraints gc = new GridBagConstraints();
	gc.insets = new Insets(5,   5,   5,   5); 
	gc.weightx = 1.0; 
	gc.weighty = 0.0;
	gc.fill = GridBagConstraints.BOTH;
	gc.gridx = 0; 
	gc.gridy = 0; 
	gc.gridwidth = 1; 
	gc.gridheight = 1;
	panel.add(new JLabel("Price:"),   gc); 
	gc.gridy = 1;
	
	panel.add(new JLabel("Description:"),   gc);
	gc.gridx = 1; 
	gc.gridy = 0;
	
	JTextField priceField = new JTextField(); panel.add(priceField,   gc);
	gc.gridy = 1;
	JTextField descrField = new JTextField(); 
	panel.add(descrField,   gc);
	
	int result = JOptionPane.showOptionDialog
		(table, new JScrollPane(panel), "Add new widget", 
			JOptionPane.OK_CANCEL_OPTION, 
			JOptionPane.PLAIN_MESSAGE, null,  null,  null);
	
	if (result == JOptionPane.OK_OPTION)   
		{
		try 
			{
			double price = Double.parseDouble(priceField.getText()); 
			String description = descrField.getText(); 
			home.create(description,  price);
			loadElements();
			table.invalidate(); 
			}   
		catch   (NumberFormatException ex)   
			{ 
			ex.printStackTrace();
			} 
		catch (RemoteException ex) 
			{ 
			ex.printStackTrace();
			} 
		catch (CreateException ex) 
			{ 
			ex.printStackTrace();
			}
		}
	}
}

private class DeleteCellEditor extends ButtonTableCellEditor  
{ 
public DeleteCellEditor(TableCellEditor editor)  
	{ 
	super(editor,   "Yes");
	}

protected void editCell(JTable table,   int row,   int column)   
	{
	Integer id =  (Integer)   table.getModel().getValueAt(row,   0);
	if   (id.intValue()   > 0)   
		{
		try 
			{
			home.remove(id);
			loadElements();
			table.invalidate();
			}   
		catch   (RemoteException e)   
			{
			e.printStackTrace();
			}   
		catch   (RemoveException e)   
			{
			e.printStackTrace();
			}
		}
	}
}

private class DescriptionCellEditor extends ButtonTableCellEditor  
{
public DescriptionCellEditor(TableCellEditor editor)   
	{
	super   (editor,   "Edit");
	}

protected void editCell(JTable table,   int row,   int column)   
	{
	JTextField textField = new JTextField();
	Object value = table.getValueAt(row,   column);
	if(value   != null)
		{
		textField.setText((String)   value);
		textField.setCaretPosition(0);
		}
	int result = JOptionPane.showOptionDialog(table, new JScrollPane(textField), 
		(String)table.getColumnName(column),
	
	JOptionPane.OK_CANCEL_OPTION,
	
	JOptionPane.PLAIN_MESSAGE, null, null, null);
	
	if (result == JOptionPane.OK_OPTION) 
		{
		Integer id =   (Integer)
		table.getModel().getValueAt(row,   0);
		if (id.intValue() > 0) 
			{
			try 
			{
			WidgetRemote remote =   (WidgetRemote) home.findByPrimaryKey(id);
			remote.setDescription(textField.getText());
			table.setValueAt(textField.getText(),   row, column);
			table.invalidate(); 
			}   
			catch   (RemoteException e)   
			{
			e.printStackTrace(); 
			}   
			catch   (FinderException e)   
			{
			e.printStackTrace();
			}
			}
		}
	}
}

private class PriceCellEditor extends ButtonTableCellEditor  
{ 
public PriceCellEditor(TableCellEditor editor)  
	{ 
	super(editor,   "Edit");
	}

protected void editCell(JTable table,   int row,   int column)   
	{
	JTextField textField = new JTextField(); 
	Object value = table.getValueAt(row,   column);
	if(value   != null)
		{
		textField.setText(((Double)   value).toString()); 
		textField.setCaretPosition(0);
		}
	
	int result = JOptionPane.showOptionDialog(table, new JScrollPane(textField), 
		(String)table.getColumnName(column),
	JOptionPane.OK_CANCEL_OPTION,
	JOptionPane.PLAIN_MESSAGE, null, null, null);
	
	if(result == JOptionPane.OK_OPTION) 
		{
		Integer id =   (Integer)
		table.getModel().getValueAt(row,   0);
		if (id.intValue() > 0) 
			{
			try 
				{
				WidgetRemote remote =   (WidgetRemote) home.findByPrimaryKey(id);
				double price = Double.
				parseDouble(textField.getText());
				remote.setPrice(price);
				
				table.setValueAt(price,   row,   column);
				table.invalidate(); 
				}   
			catch   (RemoteException e)   
				{
				e.printStackTrace(); 
				}   
			catch   (FinderException e)   
				{
				e.printStackTrace(); 
				}   
			catch   (NumberFormatException e)   
				{
				e.printStackTrace();
				}
			}
		}
	}

private void loadElements()   
	{
	try 
		{
		Collection col = home.findAll();
		model = new DefaultTableModel();
		model.addColumn("ID");
		model.addColumn("Description");
		model.addColumn("Price");
		model.addColumn("Delete");
		for   (Iterator iter = col.iterator();  iter.hasNext();)   
			{
			WidgetRemote remote =   (WidgetRemote)   iter.next();
			model.addRow(new Object   []{remote.getId(), remote.getDescription(),
			remote.getPrice(),   "Delete?"});
			}
		if (table == null) 
			{
			table = new JTable(model); 
			}  
		else  
			{
			table.setModel(model);
			}
		JTextField textField = new JTextField();
		textField.setBorder(BorderFactory.createEmptyBorder()); 
		DefaultCellEditor editor = new DefaultCellEditor(textField); editor.setClickCountToStart(l);
		
		table.getColumn(table.getColumnName(1)).setCellEditor(
		new DescriptionCellEditor(editor));
		table.getColumn(table.getColumnName(2)).setCellEditor(
		new PriceCellEditor(editor));
		table.getColumn(table.getColumnName(3)).setCellEditor(
		new DeleteCellEditor(editor)); 
		}   
	catch(RemoteException e)   
		{
		e.printStackTrace(); 
		}   
	catch(FinderException e)   
		{ 
		e.printStackTrace();
		}
	}
public static void main(String args[])   
	{
	WidgetEditClient client = new WidgetEditClient();
	client.setLocation(200,   200); 
	client.setSize(600,   400); 
	client.setVisible(true);
	}

public static Context createJBossContext()   throws NamingException  
	{ 
	Properties p = new Properties(); 
	p.put("java.naming.factory.initial", 	"org.jnp.interfaces.NamingContextFactory"); 
	p.put("java.naming.provider.url", "jnp://127.0.0.1:1099"); 
	p.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces"); 
	Context jndiContext = new InitialContext(p); 
	return jndiContext;
	}
}