/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.aop;
import org.jboss.aop.classpool.AOPClassPool;
import org.jboss.aop.instrument.Instrumentor;
import org.jboss.aop.instrument.InstrumentorFactory;
import org.jboss.logging.Logger;
import javassist.ByteArrayClassPath;
import javassist.CtClass;
import javassist.NotFoundException;
/**
* Classic weaving.
*
* @author <a href="stalep@conduct.no">Stale W. Pedersen</a>
* @author <a href="mailto:kabir.khan@jboss.org">Kabir Khan</a>
* @version $Revision:
*/
public class ClassicWeavingStrategy extends WeavingStrategySupport
{
private static final Logger logger = Logger.getLogger(ClassicWeavingStrategy.class);
private boolean verbose = AspectManager.verbose;
/**
* This is the translate version that was always there
*/
public byte[] translate(AspectManager manager, String className, ClassLoader loader, byte[] classfileBuffer) throws Exception
{
if (isReEntry())
{
return null;
}
setReEntry();
super.setTransformationStarted();
try
{
if (manager.isNonAdvisableClassName(className))
{
return null;
}
AOPClassPool pool = (AOPClassPool) manager.registerClassLoader(loader);
CtClass clazz = null;
try
{
clazz = pool.getLocally(className);
}
catch (NotFoundException e)
{
// todo Bill Burke: this scares the shit out of me, but it must be done
// I think it will screw up hotdeployment at some time. Then again, maybe not ;)
ByteArrayClassPath cp = new ByteArrayClassPath(className, classfileBuffer);
pool.insertClassPath(cp);
clazz = pool.getLocally(className);
}
if (clazz.isArray())
{
if (verbose && logger.isDebugEnabled()) logger.debug("cannot compile, isArray: " + className);
pool.flushClass(className);
return null;
}
if (clazz.isInterface())
{
if (verbose && logger.isDebugEnabled()) logger.debug("cannot compile, isInterface: " + className);
pool.flushClass(className);
return null;
}
if (clazz.isFrozen())
{
if (verbose && logger.isDebugEnabled()) logger.debug("warning, isFrozen: " + className);
clazz.defrost();
}
ClassAdvisor advisor = AdvisorFactory.getClassAdvisor(clazz, manager);
Instrumentor instrumentor = InstrumentorFactory.getInstrumentor(
pool,
manager,
manager.dynamicStrategy.getJoinpointClassifier(),
manager.dynamicStrategy.getDynamicTransformationObserver(clazz));
if (!Instrumentor.isTransformable(clazz))
{
if (verbose && logger.isDebugEnabled()) logger.debug("[cannot compile] implements Untransformable: " + className);
pool.flushClass(className);
return null;
}
manager.attachMetaData(advisor, clazz, true);
manager.applyInterfaceIntroductions(advisor, clazz);
boolean transformed = instrumentor.transform(clazz, advisor);
if (transformed)
{
pool.lockInCache(clazz);
if (AspectManager.debugClasses)
{
SecurityActions.debugWriteFile(clazz);
}
byte[] rtn = clazz.toBytecode();
if (AspectManager.getPrune()) clazz.prune();
return rtn;
}
else
{
pool.soften(clazz);
}
return null;
}
catch (Exception ex)
{
if (!(ex instanceof NotFoundException))
{
if (verbose)
logger.error(ex);
else
logger.error("[error] " + ex.getMessage() + ".. Do verbose mode if you want full stack trace.");
}
throw ex;
}
finally
{
clearReEntry();
}
}
}