Resolves arguments for a method using autowiring.

Parameters

\Symfony\Component\DependencyInjection\ContainerInterface $container: The service container.

\ReflectionParameter[] $parameters: The parameters to resolve.

string $method_name: The name of the method being called.

Return value

array The resolved arguments.

Throws

\Symfony\Component\DependencyInjection\Exception\AutowiringFailedException When a service cannot be resolved.

File

core/lib/Drupal/Core/DependencyInjection/AutowiredInstanceTrait.php, line 62

Class

AutowiredInstanceTrait

Defines a base trait for automatically wiring dependency arguments.

Namespace

Drupal\Core\DependencyInjection

Code

private static function getAutowireArguments(ContainerInterface $container, array $parameters, string $method_name) : array {
  $args = [];
  foreach ($parameters as $parameter) {
    $service = ltrim((string) $parameter->getType(), '?');
    foreach ($parameter->getAttributes(Autowire::class) as $attribute) {
      $service = (string) $attribute->newInstance()->value;
    }
    if ($container->has($service)) {
      $args[] = $container->get($service);
      continue;
    }
    if ($parameter->allowsNull()) {
      $args[] = NULL;
      continue;
    }
    throw new AutowiringFailedException($service, sprintf('Cannot autowire service "%s": argument "$%s" of method "%s::%s()". Check that either the argument type is correct or the Autowire attribute is passed a valid identifier. Otherwise configure its value explicitly if possible.', $service, $parameter->getName(), static::class, $method_name));
  }
  return $args;
}

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