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/*
* Copyright (c) 2012 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.util.event;
import java.io.PrintStream;
/**
* A {@link IListener listener} that dispatches throwable {@link ThrowableEvent events} to methods that can be
* overridden by extenders.
*
* @author Eike Stepper
* @apiviz.exclude
* @since 3.3
*/
public class ThrowableEventAdapter implements IListener
{
public ThrowableEventAdapter()
{
}
public final void notifyEvent(IEvent event)
{
if (event instanceof ThrowableEvent)
{
ThrowableEvent e = (ThrowableEvent)event;
notifyLifecycleEvent(e);
}
else
{
notifyOtherEvent(event);
}
}
protected void notifyLifecycleEvent(ThrowableEvent event)
{
onThrowable(event.getSource(), event.getThrowable());
}
protected void notifyOtherEvent(IEvent event)
{
}
protected void onThrowable(INotifier source, Throwable t)
{
}
/**
* Prints the stack traces of throwable {@link ThrowableEvent events} to a {@link PrintStream}.
*
* @author Eike Stepper
* @apiviz.exclude
*/
public static class ToPrintStream extends ThrowableEventAdapter
{
public static final ToPrintStream CONSOLE = new ToPrintStream(System.out);
private final PrintStream out;
public ToPrintStream(PrintStream out)
{
this.out = out;
}
public final PrintStream getOut()
{
return out;
}
@Override
protected void onThrowable(INotifier source, Throwable t)
{
t.printStackTrace(out);
}
}
}
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