/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.classloader.spi.translator;
import java.security.ProtectionDomain;
import java.util.List;
import java.util.ListIterator;
import org.jboss.logging.Logger;
import org.jboss.util.loading.Translator;
/**
* The translator utils/helper.
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
public class TranslatorUtils
{
/** The log */
private static final Logger log = Logger.getLogger(TranslatorUtils.class);
/**
* Apply transformers on transform.
*
* @param translators the translators
* @param classLoader the classloader
* @param className the class name
* @param byteCode the byte code
* @param protectionDomain the protection domain
* @return trabsformed bytes
* @throws Exception for any error
*/
public static byte[] applyTranslatorsOnTransform(List<Translator> translators, ClassLoader classLoader, String className, byte[] byteCode, ProtectionDomain protectionDomain) throws Exception
{
if (translators == null || translators.isEmpty())
return byteCode;
byte[] result = byteCode;
for (Translator translator : translators)
{
result = translator.transform(classLoader, className, null, protectionDomain, result);
}
return result;
}
/**
* Apply translators on classloader unregister / policy shutdown.
*
* @param translators the translators
* @param classLoader the policy's classloader
*/
public static void applyTranslatorsAtUnregister(List<Translator> translators, ClassLoader classLoader)
{
if (translators != null && translators.isEmpty() == false)
{
// go in reverse order
ListIterator<Translator> iter = translators.listIterator(translators.size() - 1);
while(iter.hasPrevious())
{
Translator translator = iter.previous();
try
{
translator.unregisterClassLoader(classLoader);
}
catch (Exception e)
{
log.warn("Exception for translator " + translator + " on CL unregister: " + e);
}
}
}
}
}