public function readToken()
    {
        if ($this->file === null) {
            throw new BuildException("No File set for IniFileTokenReader");
        }

        if ($this->tokens === null) {
            $this->processFile();
        }

        if (count($this->tokens) > 0) {
            return array_pop($this->tokens);
        } else {
            return null;
        }
    }