class DefaultFactory

DefaultsTestPluginManager.php in drupal/core/modules/system/tests/modules/plugin_test/lib/Drupal/plugin_test/Plugin/DefaultsTestPluginManager.php

Contains Drupal\plugin_test\Plugin\DefaultsTestPluginManager.

EntityManager.php in drupal/core/lib/Drupal/Core/Entity/EntityManager.php

Contains \Drupal\Core\Entity\EntityManager.

FetcherManager.php in drupal/core/modules/aggregator/lib/Drupal/aggregator/Plugin/FetcherManager.php

Definition of Drupal\aggregator\Plugin\FetcherManager.

FormatterFactory.php in drupal/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterFactory.php

Definition of Drupal\field\Plugin\Type\Formatter\FormatterFactory.

JoinManager.php in drupal/core/modules/views/lib/Drupal/views/Plugin/Type/JoinManager.php

Definition of Drupal\views\Plugin\Type\JoinManager.

... See full list

class DefaultFactory implements FactoryInterface {

  /**
   * The object that retrieves the definitions of the plugins that this factory instantiates.
   *
   * The plugin definition includes the plugin class and possibly other
   * information necessary for proper instantiation.
   *
   * @var Drupal\Component\Plugin\Discovery\DiscoveryInterface
   */
  protected $discovery;

  /**
   * Constructs a Drupal\Component\Plugin\Factory\DefaultFactory object.
   */
  public function __construct(DiscoveryInterface $discovery) {
    $this->discovery = $discovery;
  }

  /**
   * Implements Drupal\Component\Plugin\Factory\FactoryInterface::createInstance().
   */
  public function createInstance($plugin_id, array $configuration) {
    $plugin_class = $this
      ->getPluginClass($plugin_id);
    return new $plugin_class($configuration, $plugin_id, $this->discovery);
  }

  /**
   * Finds the class relevant for a given plugin.
   *
   *  @param array $plugin_id
   *    The id of a plugin.
   *
   *  @return string
   *    The appropriate class name.
   */
  protected function getPluginClass($plugin_id) {
    $plugin_definition = $this->discovery
      ->getDefinition($plugin_id);
    if (empty($plugin_definition['class'])) {
      throw new PluginException(sprintf('The plugin (%s) did not specify an instance class.', $plugin_id));
    }
    $class = $plugin_definition['class'];
    if (!class_exists($class)) {
      throw new PluginException(sprintf('Plugin (%s) instance class "%s" does not exist.', $plugin_id, $class));
    }
    return $class;
  }

}