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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) 2005,2018 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *******************************************************************************/
package org.aspectj.weaver.loadtime;

import java.security.ProtectionDomain;

/**
 * Generic class pre processor interface that allows to separate the AspectJ 5 load time weaving from Java 5 JVMTI interfaces for
 * further use on Java 1.3 / 1.4
 *
 * @author Alexandre Vasseur
 * @author Andy Clement
 */
public interface ClassPreProcessor {

	/**
	 * Post constructor initialization, usually empty
	 */
	void initialize();

	byte[] preProcess(String className, byte[] bytes, ClassLoader classLoader, ProtectionDomain protectionDomain);

	void prepareForRedefinition(ClassLoader loader, String className);
}