/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., 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.capedwarf.bytecode;
import javassist.CtClass;
import javassist.NotFoundException;
/**
* Rewrite transformer -- major hacks happen here. ;-)
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
public abstract class RewriteTransformer extends JavassistTransformer {
protected void transform(CtClass clazz) throws Exception {
if (isAlreadyModified(clazz))
return;
transformInternal(clazz);
}
protected abstract void transformInternal(CtClass clazz) throws Exception;
protected boolean isAlreadyModified(CtClass clazz) {
try {
return doCheck(clazz);
} catch (NotFoundException e) {
return false;
}
}
/**
* Return true if class is already modified.
*
* @param clazz the current class
* @return true if modified, false otherwise
* @throws NotFoundException it's OK to throw if not modified
*/
protected abstract boolean doCheck(final CtClass clazz) throws NotFoundException;
}