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   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\DependencyInjection\Compiler;
  13
  14 use Symfony\Component\DependencyInjection\ContainerBuilder;
  15 use Symfony\Component\DependencyInjection\Extension\ConfigurationExtensionInterface;
  16 use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
  17
  18 /**
  19  * Merges extension configs into the container builder.
  20  *
  21  * @author Fabien Potencier <fabien@symfony.com>
  22  */
  23 class MergeExtensionConfigurationPass implements CompilerPassInterface
  24 {
  25     /**
  26      * {@inheritdoc}
  27      */
  28     public function process(ContainerBuilder $container)
  29     {
  30         $parameters = $container->getParameterBag()->all();
  31         $definitions = $container->getDefinitions();
  32         $aliases = $container->getAliases();
  33         $exprLangProviders = $container->getExpressionLanguageProviders();
  34
  35         foreach ($container->getExtensions() as $extension) {
  36             if ($extension instanceof PrependExtensionInterface) {
  37                 $extension->prepend($container);
  38             }
  39         }
  40
  41         foreach ($container->getExtensions() as $name => $extension) {
  42             if (!$config = $container->getExtensionConfig($name)) {
  43                 // this extension was not called
  44                 continue;
  45             }
  46             $config = $container->getParameterBag()->resolveValue($config);
  47
  48             $tmpContainer = new ContainerBuilder($container->getParameterBag());
  49             $tmpContainer->setResourceTracking($container->isTrackingResources());
  50             $tmpContainer->addObjectResource($extension);
  51             if ($extension instanceof ConfigurationExtensionInterface && null !== $configuration = $extension->getConfiguration($config, $tmpContainer)) {
  52                 $tmpContainer->addObjectResource($configuration);
  53             }
  54
  55             foreach ($exprLangProviders as $provider) {
  56                 $tmpContainer->addExpressionLanguageProvider($provider);
  57             }
  58
  59             $extension->load($config, $tmpContainer);
  60
  61             $container->merge($tmpContainer);
  62             $container->getParameterBag()->add($parameters);
  63         }
  64
  65         $container->addDefinitions($definitions);
  66         $container->addAliases($aliases);
  67     }
  68 }