trait AutowireTrait

Same name and namespace in other branches
  1. 11.x core/lib/Drupal/Core/DependencyInjection/AutowireTrait.php \Drupal\Core\DependencyInjection\AutowireTrait

Defines a trait for automatically wiring dependencies from the container.

This trait uses reflection and may cause performance issues with classes that will be instantiated multiple times.

Hierarchy

1 file declares its use of AutowireTrait
ControllerBase.php in core/lib/Drupal/Core/Controller/ControllerBase.php

File

core/lib/Drupal/Core/DependencyInjection/AutowireTrait.php, line 15

Namespace

Drupal\Core\DependencyInjection
View on git.drupalcode.org
View source 
trait AutowireTrait {
  
  /**
   * Instantiates a new instance of the implementing class using autowiring.
   *
   * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
   *   The service container this instance should use.
   *
   * @return static
   */
  public static function create(ContainerInterface $container) {
    $args = [];
    if (method_exists(static::class, '__construct')) {
      $constructor = new \ReflectionMethod(static::class, '__construct');
      foreach ($constructor->getParameters() as $parameter) {
        $service = ltrim((string) $parameter->getType(), '?');
        foreach ($parameter->getAttributes(Autowire::class) as $attribute) {
          $service = (string) $attribute->newInstance()->value;
        }
        if (!$container->has($service)) {
          throw new AutowiringFailedException($service, sprintf('Cannot autowire service "%s": argument "$%s" of method "%s::_construct()", you should configure its value explicitly.', $service, $parameter->getName(), static::class));
        }
        $args[] = $container->get($service);
      }
    }
    return new static(...$args);
  }

}

Members

Title Modifiers Object type Summary Overrides
AutowireTrait::create public static function Instantiates a new instance of the implementing class using autowiring. 33

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