protected function getAppParameters()
    {
        return array_merge(
            array(
                'app.root_dir' => $this->rootDir,
                'app.environment' => $this->environment,
                'app.debug' => $this->debug,
                'app.name' => $this->name,
                'app.cache_dir' => $this->getCacheDir(),
                'app.logs_dir' => $this->getLogDir(),
                'app.charset' => $this->getCharset(),
            ),
            $this->getEnvParameters()
        );
    }