vendor/sensio/framework-extra-bundle/DependencyInjection/SensioFrameworkExtraExtension.php

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<?php

/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Sensio\Bundle\FrameworkExtraBundle\DependencyInjection;

use Symfony\Component\DependencyInjection\Alias;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;

/**
 * SensioFrameworkExtraExtension.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class SensioFrameworkExtraExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = $this->getConfiguration($configs, $container);
        $config = $this->processConfiguration($configuration, $configs);

        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
        $loader->load('services.xml');

        if (!empty($config['templating']['controller_patterns'])) {
            $container
                ->getDefinition('sensio_framework_extra.view.guesser')
                ->addArgument($config['templating']['controller_patterns']);
        }

        $annotationsToLoad = array();

        if ($config['router']['annotations']) {
            $annotationsToLoad[] = 'routing.xml';

            if (PHP_VERSION_ID < 70000) {
                $this->addClassesToCompile(array(
                    'Sensio\\Bundle\\FrameworkExtraBundle\\EventListener\\ControllerListener',
                ));
            }
        }

        if ($config['request']['converters']) {
            $annotationsToLoad[] = 'converters.xml';

            if (PHP_VERSION_ID < 70000) {
                $this->addClassesToCompile(array(
                    // cannot be added because it has some annotations
                    //'Sensio\\Bundle\\FrameworkExtraBundle\\Configuration\\ParamConverter',
                    'Sensio\\Bundle\\FrameworkExtraBundle\\EventListener\\ParamConverterListener',