public OptionArgument(AbstractTool tool,
    String name,
    String description) 
{
	
		super(tool, name, description, Entry.class.getName());
}

Constructs an OptionArgument.

Parameters:

tool - the tool that needs this argument

name - the name of the argument

description - the description of the argument

 public  void actionPerformed(ActionEvent evt) 
{
		Object[] message = new Object[2];
		message[0] = "Choose one of the following options:";
		JComboBox cb = new JComboBox();
		for(Iterator i = options.values().iterator(); i.hasNext(); ) {
			cb.addItem(i.next());
		}
		message[1] = cb;
		int result = JOptionPane.showOptionDialog( 
	 		    tool.getInternalFrame(),
	 		    message, 
	 		    description,
	 		    JOptionPane.OK_CANCEL_OPTION, 
	 		    JOptionPane.QUESTION_MESSAGE,
	 		    null,
	 		    null,
				null
	 		);
		if (result == 0) {
			Entry entry = (Entry)cb.getSelectedItem();
			setValue(entry.getValueToString());
		}
}

 public  void addOption(Object description,
    Object value) 
{
		options.put(value.toString(), new Entry(description, value));
}

Adds an Option.

 public Object getArgument() throws InstantiationException 
{
		if (value == null) return null;
		try {
			return ((Entry)options.get(value)).getValue();
		} catch (Exception e) {
			throw new InstantiationException(e.getMessage());
		}
}

Gets the argument as an object.

 public String getUsage() 
{
		StringBuffer buf = new StringBuffer(super.getUsage());
		buf.append("    possible options:\n");
		Entry entry;
		for (Iterator i = options.values().iterator(); i.hasNext(); ) {
			entry = (Entry)i.next();
			buf.append("    - ");
			buf.append(entry.getValueToString());
			buf.append(": ");
			buf.append(entry.toString());
			buf.append("\n");
		}
		return buf.toString();
}