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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) 2004, 2006 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.dynamichelpers;

import org.eclipse.core.runtime.IExtension;

/**
 * Extension change handlers are notified of changes for a given extension
 * point in the context of an extension tracker.
 * 
 * This interface can be used without OSGi running.
 * 

 * This interface is intended to be implemented by clients.
 * 
 * @since 3.1
 */
public interface IExtensionChangeHandler {

	/**
	 * This method is called whenever an extension conforming to the extension point filter
	 * is being added to the registry. This method does not automatically register objects
	 * to the tracker.
	 *
	 * @param tracker a tracker to which the handler has been registered
	 * @param extension the extension being added
	 */
	public void addExtension(IExtensionTracker tracker, IExtension extension);

	/**
	 * This method is called after the removal of an extension.
	 *
	 * @param extension the extension being removed
	 * @param objects the objects that were associated with the removed extension
	 */
	public void removeExtension(IExtension extension, Object[] objects);
}