public ClassLoaderForClassArtifacts(Class klazz) 
{
        super(klazz.getClassLoader());
        this.klazz = new SoftReference< Class > (klazz);
}

 public synchronized String createClassName(Method method) 
{
        final String name;
        final String clsName = klazz.get().getName();
        if (clsName.startsWith("java."))
          name = clsName.replace('.','_') + "$" + method.getName();
        else
          name = clsName + "$" + method.getName();
        if (!allocatedNames.contains(name)) {
          allocatedNames.add(name);
          return name;
        }
        for (int i = 0; ; i++) {
            String newName = name + "$" + i;
            if (!allocatedNames.contains(newName)) {
              allocatedNames.add(newName);
              return newName;
            }
        }
}

 public Class define(String name,
    byte[] bytes) 
{
        Class cls = defineClass(name, bytes, 0, bytes.length, klazz.get().getProtectionDomain());
        resolveClass(cls);
        return cls;
}

 public Constructor defineClassAndGetConstructor(String name,
    byte[] bytes) 
{
        final Class cls = AccessController.doPrivileged( new PrivilegedAction< Class >(){
            public Class run() {
                return define(name, bytes);
            }
        });
        if (cls != null) {
            try {
                return cls.getConstructor(CallSite.class, MetaClassImpl.class, MetaMethod.class, Class[].class);
            } catch (NoSuchMethodException e) { //
            }
        }
        return null;
}

 public Class loadClass(String name) throws ClassNotFoundException 
{
        Class cls = findLoadedClass(name);
        if (cls != null)
          return cls;
        if (GroovySunClassLoader.sunVM != null) {
            cls = GroovySunClassLoader.sunVM.doesKnow(name);
            if (cls != null)
              return cls;
        }
        return super.loadClass(name);
}