class EntityFormDisplay

entity_test.module in drupal/core/modules/system/tests/modules/entity_test/entity_test.module

Test module for the entity API providing several entity types for testing.

field.attach.inc in drupal/core/modules/field/field.attach.inc

Field attach API, allowing entities (nodes, users, ...) to be 'fieldable'.

class EntityFormDisplay extends EntityDisplayBase implements EntityFormDisplayInterface, \Serializable {

  /**
   * {@inheritdoc}
   */
  public function __construct(array $values, $entity_type) {
    $this->pluginManager = \Drupal::service('plugin.manager.field.widget');
    $this->displayContext = 'form';
    parent::__construct($values, $entity_type);
  }

  /**
   * {@inheritdoc}
   */
  public function getWidget($field_name) {
    if (isset($this->plugins[$field_name])) {
      return $this->plugins[$field_name];
    }

    // Instantiate the widget object from the stored display properties.
    if ($configuration = $this
      ->getComponent($field_name)) {
      $instance = field_info_instance($this->targetEntityType, $field_name, $this->bundle);
      $widget = $this->pluginManager
        ->getInstance(array(
        'instance' => $instance,
        'form_mode' => $this->originalMode,
        // No need to prepare, defaults have been merged in setComponent().
        'prepare' => FALSE,
        'configuration' => $configuration,
      ));
    }
    else {
      $widget = NULL;
    }

    // Persist the widget object.
    $this->plugins[$field_name] = $widget;
    return $widget;
  }

  /**
   * {@inheritdoc}
   */
  public function serialize() {

    // Only store the definition, not external objects or derived data.
    $data = $this
      ->getExportProperties() + array(
      'entityType' => $this
        ->entityType(),
    );
    return serialize($data);
  }

  /**
   * {@inheritdoc}
   */
  public function unserialize($serialized) {
    $data = unserialize($serialized);
    $entity_type = $data['entityType'];
    unset($data['entityType']);
    $this
      ->__construct($data, $entity_type);
  }

}