class ConstraintFactory

Constraint plugin factory.

Symfony Constraint plugins are created as Drupal plugins, but the default plugin constructor is not compatible.

Hierarchy

Expanded class hierarchy of ConstraintFactory

1 file declares its use of ConstraintFactory
ConstraintFactoryTest.php in core/tests/Drupal/KernelTests/Core/Validation/ConstraintFactoryTest.php

File

core/lib/Drupal/Core/Validation/ConstraintFactory.php, line 16

Namespace

Drupal\Core\Validation
View source
class ConstraintFactory extends ContainerFactory {
  
  /**
   * {@inheritdoc}
   */
  public function createInstance($plugin_id, array $configuration = []) {
    $plugin_definition = $this->discovery
      ->getDefinition($plugin_id);
    $plugin_class = static::getPluginClass($plugin_id, $plugin_definition, $this->interface);
    if (is_subclass_of($plugin_class, CompositeConstraintInterface::class)) {
      $composite_constraint_options = (array) $plugin_class::getCompositeOptionStatic();
      foreach ($composite_constraint_options as $option) {
        foreach ($configuration[$option] as $key => $value) {
          foreach ($value as $nested_constraint_id => $nested_constraint_configuration) {
            $configuration[$option][$key] = $this->createInstance($nested_constraint_id, $nested_constraint_configuration);
          }
        }
      }
    }
    // If the plugin provides a factory method, pass the container to it.
    if (is_subclass_of($plugin_class, ContainerFactoryPluginInterface::class)) {
      return $plugin_class::create(\Drupal::getContainer(), $configuration, $plugin_id, $plugin_definition);
    }
    // If the plugin is a Symfony Constraint, use the correct constructor.
    if (is_subclass_of($plugin_class, Constraint::class)) {
      $reflection_class = new \ReflectionClass($plugin_class);
      $reflection_constructor = $reflection_class->getConstructor();
      // If configuration is empty, an empty first parameter is passed to any
      // plugin class constructor that has a required parameter. Otherwise,
      // create a new plugin class instance without any constructor parameters.
      if (empty($configuration)) {
        return $reflection_constructor?->getNumberOfRequiredParameters() > 0 ? new $plugin_class($configuration) : new $plugin_class();
      }
      // If the plugin class has the HasNamedArguments attribute on its
      // constructor, then passing named parameters to the constructor will be
      // required.
      $has_named_arguments = (bool) $reflection_constructor->getAttributes(HasNamedArguments::class);
      if ($has_named_arguments) {
        // If the configuration array is associative, use the spread operator to
        // pass the values as named parameters.
        // @todo Trigger deprecation when $configuration is not an associative
        //   array in https://www.drupal.org/project/drupal/issues/3555134.
        return array_is_list($configuration) ? new $plugin_class($configuration) : new $plugin_class(...$configuration);
      }
      return new $plugin_class($configuration);
    }
    // Otherwise, create the plugin as normal.
    return new $plugin_class($configuration, $plugin_id, $plugin_definition);
  }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
ConstraintFactory::createInstance public function Creates a plugin instance based on the provided ID and configuration. Overrides ContainerFactory::createInstance
DefaultFactory::$discovery protected property The object that gets the plugin definitions that this factory instantiates.
DefaultFactory::$interface protected property Defines an interface each plugin should implement.
DefaultFactory::getPluginClass public static function Finds the class relevant for a given plugin. 1
DefaultFactory::__construct public function Constructs a Drupal\Component\Plugin\Factory\DefaultFactory object.

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