CheckExceptionOnInvalidReferenceBehaviorPass.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\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\ContainerBuilder;

/**
 * Checks that all references are pointing to a valid service.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class CheckExceptionOnInvalidReferenceBehaviorPass implements CompilerPassInterface {
  private $container;
  private $sourceId;
  public function process(ContainerBuilder $container) {
    $this->container = $container;
    foreach ($container
      ->getDefinitions() as $id => $definition) {
      $this->sourceId = $id;
      $this
        ->processDefinition($definition);
    }
  }
  private function processDefinition(Definition $definition) {
    $this
      ->processReferences($definition
      ->getArguments());
    $this
      ->processReferences($definition
      ->getMethodCalls());
    $this
      ->processReferences($definition
      ->getProperties());
  }
  private function processReferences(array $arguments) {
    foreach ($arguments as $argument) {
      if (is_array($argument)) {
        $this
          ->processReferences($argument);
      }
      elseif ($argument instanceof Definition) {
        $this
          ->processDefinition($argument);
      }
      elseif ($argument instanceof Reference && ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE === $argument
        ->getInvalidBehavior()) {
        $destId = (string) $argument;
        if (!$this->container
          ->has($destId)) {
          throw new ServiceNotFoundException($destId, $this->sourceId);
        }
      }
    }
  }

}