/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility.events;
import java.awt.EventQueue;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.Serializable;
/**
* AWT-aware implementation of ChangeNotifier interface:
* If we are executing on the AWT event-dispatch thread,
* simply forward the change notification directly to the listener.
* If we are executing on some other thread, queue up the
* notification on the AWT event queue so it can be executed
* on the event-dispatch thread (after the pending events have
* been dispatched).
*/
public final class AWTChangeNotifier
implements ChangeNotifier, Serializable
{
// singleton
private static ChangeNotifier INSTANCE;
private static final long serialVersionUID = 1L;
/**
* Return the singleton.
*/
public synchronized static ChangeNotifier instance() {
if (INSTANCE == null) {
INSTANCE = new AWTChangeNotifier();
}
return INSTANCE;
}
/**
* Ensure non-instantiability.
*/
private AWTChangeNotifier() {
super();
}
/**
* @see ChangeNotifier#stateChanged(StateChangeListener, StateChangeEvent)
*/
public void stateChanged(final StateChangeListener listener, final StateChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.stateChanged(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.stateChanged(event);
}
public String toString() {
return "stateChanged";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#propertyChange(java.beans.PropertyChangeListener, java.beans.PropertyChangeEvent)
*/
public void propertyChange(final PropertyChangeListener listener, final PropertyChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.propertyChange(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.propertyChange(event);
}
public String toString() {
return "propertyChange";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#itemsAdded(CollectionChangeListener, CollectionChangeEvent)
*/
public void itemsAdded(final CollectionChangeListener listener, final CollectionChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.itemsAdded(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.itemsAdded(event);
}
public String toString() {
return "itemsAdded (Collection)";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#itemsRemoved(CollectionChangeListener, CollectionChangeEvent)
*/
public void itemsRemoved(final CollectionChangeListener listener, final CollectionChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.itemsRemoved(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.itemsRemoved(event);
}
public String toString() {
return "itemsRemoved (Collection)";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#collectionChanged(CollectionChangeListener, CollectionChangeEvent)
*/
public void collectionChanged(final CollectionChangeListener listener, final CollectionChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.collectionChanged(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.collectionChanged(event);
}
public String toString() {
return "collectionChanged";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#itemsAdded(ListChangeListener, ListChangeEvent)
*/
public void itemsAdded(final ListChangeListener listener, final ListChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.itemsAdded(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.itemsAdded(event);
}
public String toString() {
return "itemsAdded (List)";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#itemsRemoved(ListChangeListener, ListChangeEvent)
*/
public void itemsRemoved(final ListChangeListener listener, final ListChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.itemsRemoved(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.itemsRemoved(event);
}
public String toString() {
return "itemsRemoved (List)";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#itemsReplaced(ListChangeListener, ListChangeEvent)
*/
public void itemsReplaced(final ListChangeListener listener, final ListChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.itemsReplaced(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.itemsReplaced(event);
}
public String toString() {
return "itemsReplaced (List)";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#listChanged(ListChangeListener, ListChangeEvent)
*/
public void listChanged(final ListChangeListener listener, final ListChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.listChanged(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.listChanged(event);
}
public String toString() {
return "listChanged";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#nodeAdded(TreeChangeListener, TreeChangeEvent)
*/
public void nodeAdded(final TreeChangeListener listener, final TreeChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.nodeAdded(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.nodeAdded(event);
}
public String toString() {
return "nodeAdded";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#nodeRemoved(TreeChangeListener, TreeChangeEvent)
*/
public void nodeRemoved(final TreeChangeListener listener, final TreeChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.nodeRemoved(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.nodeRemoved(event);
}
public String toString() {
return "nodeRemoved";
}
}
);
}
}
/**
* @see ChangeSupport.Notifier#treeChanged(TreeChangeListener, TreeChangeEvent)
*/
public void treeChanged(final TreeChangeListener listener, final TreeChangeEvent event) {
if (EventQueue.isDispatchThread()) {
listener.treeChanged(event);
} else {
this.invoke(
new Runnable() {
public void run() {
listener.treeChanged(event);
}
public String toString() {
return "treeChanged";
}
}
);
}
}
/**
* EventQueue.invokeLater(Runnable) seems to work OK;
* but using #invokeAndWait() can somtimes make things
* more predictable when debugging.
*/
private void invoke(Runnable r) {
EventQueue.invokeLater(r);
// try {
// EventQueue.invokeAndWait(r);
// } catch (InterruptedException ex) {
// throw new RuntimeException(ex);
// } catch (java.lang.reflect.InvocationTargetException ex) {
// throw new RuntimeException(ex);
// }
}
/**
* Serializable singleton support
*/
private Object readResolve() {
return instance();
}
}