/**************************************************************************************
* Copyright (c) Jonas Bon�r, Alexandre Vasseur. All rights reserved. *
* http://aspectwerkz.codehaus.org *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the LGPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package org.codehaus.aspectwerkz.hook;
import java.lang.instrument.Instrumentation;
import java.lang.instrument.ClassFileTransformer;
/**
* Java 1.5 preMain agent
* Can be used with -javaagent:aspectwerkz-core-XXX.jar
*
* @author <a href="mailto:alex@gnilux.com">Alexandre Vasseur</a>
*/
public class Agent {
/**
* The instrumentation instance
*/
private static Instrumentation s_instrumentation;
/**
* The ClassFileTransformer wrapping AspectWerkz weaver
*/
public static ClassFileTransformer s_transformer = new PreProcessorAdapter();
/**
* JSR-163 preMain Agent entry method
*/
public static void premain(String options, Instrumentation instrumentation) {
s_instrumentation = instrumentation;
s_instrumentation.addTransformer(s_transformer);
}
/**
* Returns the Instrumentation system level instance
*/
public static Instrumentation getInstrumentation() {
if (s_instrumentation == null) {
throw new UnsupportedOperationException("Java 5 was not started with preMain -javaagent for AspectWerkz");
}
return s_instrumentation;
}
}