ComputedTestFieldItemList.php in Drupal 9

Namespace

Drupal\entity_test\Plugin\Field

File

core/modules/system/tests/modules/entity_test/src/Plugin/Field/ComputedTestFieldItemList.php

<?php

namespace Drupal\entity_test\Plugin\Field;

use Drupal\Core\TypedData\ComputedItemListTrait;
use Drupal\Core\Field\FieldItemList;

/**
 * A computed field item list.
 */
class ComputedTestFieldItemList extends FieldItemList {
  use ComputedItemListTrait;

  /**
   * Compute the list property from state.
   */
  protected function computeValue() {

    // Count the number of times this method has been executed during the
    // lifecycle of an entity.
    $execution_count = \Drupal::state()
      ->get('computed_test_field_execution', 0);
    \Drupal::state()
      ->set('computed_test_field_execution', ++$execution_count);
    foreach (\Drupal::state()
      ->get('entity_test_computed_field_item_list_value', []) as $delta => $item) {
      $this->list[$delta] = $this
        ->createItem($delta, $item);
    }
  }

}

Classes

Name	Description
ComputedTestFieldItemList	A computed field item list.