frolic with zf-fr Hydrator

sample.php

<?php
 use Hydrator\ObjectPropertyHydrator;
 use Hydrator\Strategy\DateStrategy;

 use Hydrator\Strategy\StrategyInterface;
 use Hydrator\Context\ExtractionContext;
 use Hydrator\Context\HydrationContext;

 use Zend\Uri\UriInterface;
 use Zend\Uri\UriFactory;

// comosper require zfr/hydrator
// https://github.com/zf-fr/hydrator
 require 'vendor/autoload.php';

 class ResolveUriStrategy implements StrategyInterface
 {
     private $baseUri;

     public function __construct(UriInterface $baseUri, $normalize = true)
     {
         $this->baseUri = $baseUri;
         $this->normalize = $normalize;
     }

     public function extract($value, ExtractionContext $context = null)
     {
         return $value;
     }

     public function hydrate($value, HydrationContext $context = null)
     {
         $uri = UriFactory::factory($value, 'http')->resolve($this->baseUri);
         if ($this->normalize) $uri->normalize();

         return $uri;
     }
 }

 $baseUri = UriFactory::factory('http://example.com/foo/bar/baz');
 $scraped = [
     'entry' => 'Hello',
     'url' => '../foo',
     'edited' => '2008-05-16T11:25:30+09:00', // RFC 3339
 ];
 $obj = new stdClass;

 $hydrator = new ObjectPropertyHydrator;
 $hydrator->setStrategy('url', new ResolveUriStrategy($baseUri));
 $hydrator->setStrategy('edited', new DateStrategy);
 $hydrator->hydrate($scraped, $obj);

 var_dump($obj->url->toString()); // string(26) "http://example.com/foo/foo"

What do you think of the new idea of making hydrators final? :) I'm still trying to find the best way for tat, I need people's feedback :d.