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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/*******************************************************************************
 * Copyright (c) 2003, 2007 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.runtime;

import java.util.EventListener;

/**
 * Note: for new implementations consider using {@link IRegistryEventListener}.
 * 
 * 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.
 * 

 * This interface can be used without OSGi running.
 * 

 * Clients may implement this interface.
 * 
 *
 * @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.
	 * 
	 * 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.
	 * 
 
	 * Note: This method is called by the platform; it is not intended
	 * to be called directly by clients.
	 * 
	 *
	 * @param event the registry change event
	 * @see IRegistryChangeEvent
	 */
	public void registryChanged(IRegistryChangeEvent event);
}