xdebug/blog/vendor/symfony/routing/DependencyInjection/RoutingResolverPass.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Routing\DependencyInjection;

use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;

/**
 * Adds tagged routing.loader services to routing.resolver service.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class RoutingResolverPass implements CompilerPassInterface
{
    private $resolverServiceId;
    private $loaderTag;

    public function __construct($resolverServiceId = 'routing.resolver', $loaderTag = 'routing.loader')
    {
        $this->resolverServiceId = $resolverServiceId;
        $this->loaderTag = $loaderTag;
    }

    public function process(ContainerBuilder $container)
    {
        if (false === $container->hasDefinition($this->resolverServiceId)) {
            return;
        }

        $definition = $container->getDefinition($this->resolverServiceId);

        foreach ($container->findTaggedServiceIds($this->loaderTag, true) as $id => $attributes) {
            $definition->addMethodCall('addLoader', array(new Reference($id)));
        }
    }
}