Tale\Jade\Renderer::getAdapter PHP Method

    public function getAdapter()
    {
        if (!isset($this->adapter)) {
            $adapter = $this->options['adapter'];
            $className = strpos($adapter, '\\') === false ? __NAMESPACE__ . '\\Renderer\\Adapter\\' . ucfirst($this->options['adapter']) : $adapter;
            if (!class_exists($className)) {
                throw new \RuntimeException("The passed adapter {$className} doesn't exist");
            }
            if (!is_subclass_of($className, __NAMESPACE__ . '\\Renderer\\AdapterBase')) {
                throw new \RuntimeException("The passed adapter {$className} doesn't extend Tale\\Jade\\Renderer\\AdapterBase");
            }
            $this->adapter = new $className($this, $this->options['adapter_options']);
        }
        return $this->adapter;
    }