class DefaultFactory implements Factory {
    private $loader;
    private $instantiator;

    function __construct(Loader $loader, Instantiator $instantiator) {
        $this->loader = $loader;
        $this->instantiator = $instantiator;
    }

    function produce($request) {
        $this->loader->load($request);
        return $this->instantiator->instantiate($request);
    }

}