com.sptci.epng.editabletree
Class Listener

java.lang.Object
  com.sptci.epng.editabletree.Listener

All Implemented Interfaces:

Serializable, EventListener, ActionListener

Direct Known Subclasses:

DeleteListener, SaveListener

public abstract class Listener
extends Object
implements ActionListener

An abstract listener class used to provide common logic to the default save and delete actions associated with adding or deleting nodes.

&coopy; Copyright 2007 Sans Pareil Technologies, Inc.

Version:

$Id: Listener.java 4553 2008-12-24 10:34:16Z rakesh $

Author:

Rakesh Vidyadharan 2007-05-13

See Also:

Serialized Form

Field Summary

protected JDOApplication	app A reference to the JDO specific application instance.
protected static Logger	logger The logger to use to log errors or messages to.

Constructor Summary

Listener()

Method Summary

void	actionPerformed(ActionEvent event) The action listener implementation.
protected Object	getFactory(Node node) Fetch the repository object used to interact with the data store.
protected abstract Treeable	updateStore(Node node) The method that is used to update the data store.
protected abstract void	updateView(Node node, Treeable treeable) The method that is used ot update the tree once the data store has been updated.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

logger

protected static final Logger logger

The logger to use to log errors or messages to.

app

protected final JDOApplication app

A reference to the JDO specific application instance.

Constructor Detail

Listener

public Listener()

Method Detail

actionPerformed

public void actionPerformed(ActionEvent event)

The action listener implementation. Find the parent Node of the event.getSource and perform the appropriate operations.

Specified by:

actionPerformed in interface ActionListener

See Also:

updateStore(com.sptci.epng.editabletree.Node), updateView(com.sptci.epng.editabletree.Node, com.sptci.jdo.Treeable)

getFactory

protected Object getFactory(Node node)

Fetch the repository object used to interact with the data store.

Parameters:

node - The parent node from which the action was triggered.

Returns:

The repository class.

updateStore

protected abstract Treeable updateStore(Node node)

The method that is used to update the data store.

Parameters:

node - The parent node object from which the action was initiated.

Returns:

The model object that was updated in the data store.

updateView

protected abstract void updateView(Node node,
                                   Treeable treeable)

The method that is used ot update the tree once the data store has been updated.

Parameters:

node - The parent node object from which the action was initiated.

treeable - The model object that has been updated in the data store.