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/*******************************************************************************
* Copyright (c) 2004, 2005 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.commands;
/**
* An instance of this interface can be used by clients to receive notification
* of changes to one or more instances of <code>IHandler</code>.
* <p>
* This interface may be implemented by clients.
* </p>
*
* @since 3.1
* @see IHandler#addHandlerListener(IHandlerListener)
* @see IHandler#removeHandlerListener(IHandlerListener)
*/
public interface IHandlerListener {
/**
* Notifies that one or more properties of an instance of
* <code>IHandler</code> have changed. Specific details are described in
* the <code>HandlerEvent</code>.
*
* @param handlerEvent
* the handler event. Guaranteed not to be <code>null</code>.
*/
void handlerChanged(HandlerEvent handlerEvent);
}