UrlMatcher.php

1. 8.x drupal/core/lib/Drupal/Core/Routing/UrlMatcher.php
2. 8.x drupal/core/vendor/symfony/routing/Symfony/Component/Routing/Matcher/UrlMatcher.php
3. 8.x drupal/core/vendor/symfony-cmf/routing/Symfony/Cmf/Component/Routing/NestedMatcher/UrlMatcher.php

<?php

/**
 * @file
 * Contains Drupal\Core\Routing\UrlMatcher.
 */
namespace Drupal\Core\Routing;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\Routing\RequestContext;
use Symfony\Cmf\Component\Routing\NestedMatcher\UrlMatcher as BaseUrlMatcher;

/**
 * Drupal-specific URL Matcher; handles the Drupal "system path" mapping.
 */
class UrlMatcher extends BaseUrlMatcher {

  /**
   * Constructs a new UrlMatcher.
   *
   * The parent class has a constructor we need to skip, so just override it
   * with a no-op.
   */
  public function __construct() {
  }
  public function finalMatch(RouteCollection $collection, Request $request) {
    $this->routes = $collection;
    $context = new RequestContext();
    $context
      ->fromRequest($request);
    $this
      ->setContext($context);
    return $this
      ->match('/' . $request->attributes
      ->get('system_path'));
  }

}