aleph1.co.uk Git - yaffs-website/blob - web/core/lib/Drupal/Core/DependencyInjection/ClassResolver.php

   1 <?php
   2
   3 namespace Drupal\Core\DependencyInjection;
   4
   5 use Symfony\Component\DependencyInjection\ContainerAwareTrait;
   6 use Symfony\Component\DependencyInjection\ContainerAwareInterface;
   7
   8 /**
   9  * Implements the class resolver interface supporting class names and services.
  10  */
  11 class ClassResolver implements ClassResolverInterface, ContainerAwareInterface {
  12   use DependencySerializationTrait;
  13   use ContainerAwareTrait;
  14
  15   /**
  16    * {@inheritdoc}
  17    */
  18   public function getInstanceFromDefinition($definition) {
  19     if ($this->container->has($definition)) {
  20       $instance = $this->container->get($definition);
  21     }
  22     else {
  23       if (!class_exists($definition)) {
  24         throw new \InvalidArgumentException(sprintf('Class "%s" does not exist.', $definition));
  25       }
  26
  27       if (is_subclass_of($definition, 'Drupal\Core\DependencyInjection\ContainerInjectionInterface')) {
  28         $instance = $definition::create($this->container);
  29       }
  30       else {
  31         $instance = new $definition();
  32       }
  33     }
  34
  35     if ($instance instanceof ContainerAwareInterface) {
  36       $instance->setContainer($this->container);
  37     }
  38
  39     return $instance;
  40   }
  41
  42 }