class DefaultFactory

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

Contains \Drupal\aggregator\Plugin\AggregatorPluginManager.

ArchiverManager.php in drupal/core/lib/Drupal/Core/Archiver/ArchiverManager.php

BlockManager.php in drupal/core/modules/block/lib/Drupal/block/Plugin/Type/BlockManager.php

CKEditorPluginManager.php in drupal/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php

Contains \Drupal\ckeditor\CKEditorPluginManager.

ConditionManager.php in drupal/core/lib/Drupal/Core/Condition/ConditionManager.php

Contains \Drupal\Core\Condition\ConditionManager.

... 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_definition = $this->discovery
      ->getDefinition($plugin_id);
    $plugin_class = static::getPluginClass($plugin_id, $plugin_definition);
    return new $plugin_class($configuration, $plugin_id, $plugin_definition);
  }

  /**
   * Finds the class relevant for a given plugin.
   *
   * @param string $plugin_id
   *   The id of a plugin.
   * @param array $plugin_definition
   *   The plugin definition associated to the plugin_id.
   *
   * @return string
   *   The appropriate class name.
   */
  public static function getPluginClass($plugin_id, array $plugin_definition = NULL) {
    if (empty($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;
  }

}