private function findClasspathAndClass($class)
    {
        if (false !== $pos = strrpos($class, '\\')) {
            // namespaced class name
            $classpath = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 0, $pos)) . DIRECTORY_SEPARATOR;
            $classname = substr($class, $pos + 1);

            return array($classpath, $classname);
        }

        // PEAR-like class name
        $classpath = null;
        $classname = $class;

        return array($classpath, $classname);
    }