/*******************************************************************************
 * Copyright (c) 2003, 2007 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.runtime;

import java.util.EventListener;

/**
 * <b>Note:</b> for new implementations consider using {@link IRegistryEventListener}.
 * <p>
 * A registry change listener is notified of changes to extensions points in the 
 * registry.  These changes arise from subsequent manipulation of the registry after 
 * it was initially created.
 * </p><p>
 * This interface can be used without OSGi running.
 * </p><p>
 * Clients may implement this interface.
 * </p>
 * 
 * @since 3.0
 * @see IExtensionRegistry
 * @see IRegistryChangeEvent
 */
public interface IRegistryChangeListener extends EventListener {
	/**
	 * Notifies this listener that some registry changes are happening, or have 
	 * already happened.
	 * <p>
	 * The supplied event gives details. This event object (and the deltas in it) is valid 
	 * only for the duration of the invocation of this method.
	 * </p> <p>
	 * Note: This method is called by the platform; it is not intended
	 * to be called directly by clients.
	 * </p>
	 * 
	 * @param event the registry change event
	 * @see IRegistryChangeEvent
	 */
	public void registryChanged(IRegistryChangeEvent event);
}
