public function findFile($strClass)
    {
        if (isset($this->classmap[$strClass])) {
            $strFile = $this->classmap[$strClass];
        }
        else {
            $strFile = $this->composerAutoloader->findFile($strClass);
        }

        if ($strFile && file_exists($strFile)) {
            return $strFile;
        }
        else {
            return null;
        }
    }