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<?php
namespace Drupal\views;
use Drupal\Core\Field\BaseFieldDefinition;
/**
* A trait containing helper methods for field definitions.
*/
trait FieldAPIHandlerTrait {
/**
* The field definition.
*
* @var \Drupal\Core\Field\FieldDefinitionInterface
*/
protected $fieldDefinition;
/**
* The field storage definition.
*
* @var \Drupal\field\FieldStorageConfigInterface
*/
protected $fieldStorageDefinition;
/**
* Gets the field definition.
*
* A View works on an entity type across bundles, and thus only has access to
* field storage definitions. In order to be able to use widgets and
* formatters, we create a generic field definition out of that storage
* definition.
*
* @see BaseFieldDefinition::createFromFieldStorageDefinition()
*
* @return \Drupal\Core\Field\FieldDefinitionInterface
* The field definition used by this handler.
*/
protected function getFieldDefinition() {
if (!$this->fieldDefinition) {
$field_storage_config = $this->getFieldStorageDefinition();
$this->fieldDefinition = BaseFieldDefinition::createFromFieldStorageDefinition($field_storage_config);
}
return $this->fieldDefinition;
}
/**
* Gets the field storage configuration.
*
* @return \Drupal\field\FieldStorageConfigInterface
* The field storage definition used by this handler
*/
protected function getFieldStorageDefinition() {
if (!$this->fieldStorageDefinition) {
$field_storage_definitions = $this->getEntityManager()->getFieldStorageDefinitions($this->definition['entity_type']);
$this->fieldStorageDefinition = $field_storage_definitions[$this->definition['field_name']];
}
return $this->fieldStorageDefinition;
}
/**
* Returns the entity manager.
*
* @return \Drupal\Core\Entity\EntityManagerInterface
* The entity manager service.
*/
protected function getEntityManager() {
if (!isset($this->entityManager)) {
$this->entityManager = \Drupal::entityManager();
}
return $this->entityManager;
}
}