class ProviderBasedGenerator

ProviderBasedGeneratorTest.php in drupal/core/vendor/symfony-cmf/routing/Symfony/Cmf/Component/Routing/Tests/Routing/ProviderBasedGeneratorTest.php

UrlGenerator.php in drupal/core/lib/Drupal/Core/Routing/UrlGenerator.php

Contains Drupal\Core\Routing\UrlGenerator.

class ProviderBasedGenerator extends UrlGenerator implements VersatileGeneratorInterface {

  /**
   * The route provider for this generator.
   *
   * @var RouteProviderInterface
   */
  protected $provider;
  public function __construct(RouteProviderInterface $provider, LoggerInterface $logger = null) {
    $this->provider = $provider;
    $this->logger = $logger;
  }

  /**
   * {@inheritDoc}
   */
  public function generate($name, $parameters = array(), $absolute = false) {
    if ($name instanceof SymfonyRoute) {
      $route = $name;
    }
    elseif (null === ($route = $this->provider
      ->getRouteByName($name, $parameters))) {
      throw new RouteNotFoundException(sprintf('Route "%s" does not exist.', $name));
    }

    // the Route has a cache of its own and is not recompiled as long as it does not get modified
    $compiledRoute = $route
      ->compile();
    $hostTokens = $compiledRoute
      ->getHostTokens();
    return $this
      ->doGenerate($compiledRoute
      ->getVariables(), $route
      ->getDefaults(), $route
      ->getRequirements(), $compiledRoute
      ->getTokens(), $parameters, $name, $absolute, $hostTokens);
  }

  /**
   * Support a route object and any string as route name
   *
   * {@inheritDoc}
   */
  public function supports($name) {
    return is_string($name) || $name instanceof SymfonyRoute;
  }

  /**
   * {@inheritDoc}
   */
  public function getRouteDebugMessage($name, array $parameters = array()) {
    if ($name instanceof RouteObjectInterface) {
      return 'Route with key ' . $name
        ->getRouteKey();
    }
    if ($name instanceof SymfonyRoute) {
      return 'Route with pattern ' . $name
        ->getPattern();
    }
    return $name;
  }

}