import java.awt.event.*;

import javax.swing.*;

/*

* The ActionMapAction class is a convenience class that allows you to use

* an installed Action as an Action or ActionListener on a separate component.

*

* It can be used on components like JButton or JMenuItem that support an

* Action as a property of the component. Or it can be added to the same

* above components as an ActionListener.

*

* The benefit of this class is that a new ActionEvent will be created such

* that the source of the event is the component the Action belongs to, not

* the component that was "clicked". Otherwise in many cases a

* ClassCastException will be thrown when the Action is invoked.

*/

public class ActionMapAction extends AbstractAction

{

private Action originalAction;

private JComponent component;

private String actionCommand = "";

/**

* Replace the default Action for the given KeyStroke with a custom Action

*

* @param name the name parameter of the Action

* @param componet the component the Action belongs to

* @param actionKey the key to identify the Action in the ActionMap

*/

public ActionMapAction(String name, JComponent component, String actionKey)

{

super(name);

originalAction = component.getActionMap().get(actionKey);

if (originalAction == null)

{

String message = "no Action for action key: " + actionKey;

throw new IllegalArgumentException(message);

}

this.component = component;

}

public void setActionCommand(String actionCommand)

{

this.actionCommand = actionCommand;

}

/**

* Invoke the original Action using the original component as the source

* of the event.

*/

public void actionPerformed(ActionEvent e)

{

e = new ActionEvent(

component,

ActionEvent.ACTION_PERFORMED,

actionCommand,

e.getWhen(),

e.getModifiers());

originalAction.actionPerformed(e);

}

}