diff core/lib/Drupal/Core/Entity/EntityFieldManager.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Entity/EntityFieldManager.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,610 @@
+<?php
+
+namespace Drupal\Core\Entity;
+
+use Drupal\Core\Cache\Cache;
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Cache\UseCacheBackendTrait;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\TypedData\TypedDataManagerInterface;
+
+/**
+ * Manages the discovery of entity fields.
+ *
+ * This includes field definitions, base field definitions, and field storage
+ * definitions.
+ */
+class EntityFieldManager implements EntityFieldManagerInterface {
+
+  use UseCacheBackendTrait;
+  use StringTranslationTrait;
+
+  /**
+   * Extra fields by bundle.
+   *
+   * @var array
+   */
+  protected $extraFields = [];
+
+  /**
+   * Static cache of base field definitions.
+   *
+   * @var array
+   */
+  protected $baseFieldDefinitions;
+
+  /**
+   * Static cache of field definitions per bundle and entity type.
+   *
+   * @var array
+   */
+  protected $fieldDefinitions;
+
+  /**
+   * Static cache of field storage definitions per entity type.
+   *
+   * Elements of the array:
+   *  - $entity_type_id: \Drupal\Core\Field\BaseFieldDefinition[]
+   *
+   * @var array
+   */
+  protected $fieldStorageDefinitions;
+
+  /**
+   * An array keyed by entity type. Each value is an array whose keys are
+   * field names and whose value is an array with two entries:
+   *   - type: The field type.
+   *   - bundles: The bundles in which the field appears.
+   *
+   * @return array
+   */
+  protected $fieldMap = [];
+
+  /**
+   * An array keyed by field type. Each value is an array whose key are entity
+   * types including arrays in the same form that $fieldMap.
+   *
+   * It helps access the mapping between types and fields by the field type.
+   *
+   * @var array
+   */
+  protected $fieldMapByFieldType = [];
+
+  /**
+   * The typed data manager.
+   *
+   * @var \Drupal\Core\TypedData\TypedDataManagerInterface
+   */
+  protected $typedDataManager;
+
+  /**
+   * The language manager.
+   *
+   * @var \Drupal\Core\Language\LanguageManagerInterface
+   */
+  protected $languageManager;
+
+  /**
+   * The key-value factory.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface
+   */
+  protected $keyValueFactory;
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * The entity type bundle info.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
+   */
+  protected $entityTypeBundleInfo;
+
+  /**
+   * The entity display repository.
+   *
+   * @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface
+   */
+  protected $entityDisplayRepository;
+
+  /**
+   * Constructs a new EntityFieldManager.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The entity type manager.
+   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
+   *   The entity type bundle info.
+   * @param \Drupal\Core\Entity\EntityDisplayRepositoryInterface $entity_display_repository
+   *   The entity display repository.
+   * @param \Drupal\Core\TypedData\TypedDataManagerInterface $typed_data_manager
+   *   The typed data manager.
+   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   *   The language manager.
+   * @param \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory
+   *   The key-value factory.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+   *   The cache backend.
+   */
+  public function __construct(EntityTypeManagerInterface $entity_type_manager, EntityTypeBundleInfoInterface $entity_type_bundle_info, EntityDisplayRepositoryInterface $entity_display_repository, TypedDataManagerInterface $typed_data_manager, LanguageManagerInterface $language_manager, KeyValueFactoryInterface $key_value_factory, ModuleHandlerInterface $module_handler, CacheBackendInterface $cache_backend) {
+    $this->entityTypeManager = $entity_type_manager;
+    $this->entityTypeBundleInfo = $entity_type_bundle_info;
+    $this->entityDisplayRepository = $entity_display_repository;
+
+    $this->typedDataManager = $typed_data_manager;
+    $this->languageManager = $language_manager;
+    $this->keyValueFactory = $key_value_factory;
+    $this->moduleHandler = $module_handler;
+    $this->cacheBackend = $cache_backend;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getBaseFieldDefinitions($entity_type_id) {
+    // Check the static cache.
+    if (!isset($this->baseFieldDefinitions[$entity_type_id])) {
+      // Not prepared, try to load from cache.
+      $cid = 'entity_base_field_definitions:' . $entity_type_id . ':' . $this->languageManager->getCurrentLanguage()->getId();
+      if ($cache = $this->cacheGet($cid)) {
+        $this->baseFieldDefinitions[$entity_type_id] = $cache->data;
+      }
+      else {
+        // Rebuild the definitions and put it into the cache.
+        $this->baseFieldDefinitions[$entity_type_id] = $this->buildBaseFieldDefinitions($entity_type_id);
+        $this->cacheSet($cid, $this->baseFieldDefinitions[$entity_type_id], Cache::PERMANENT, ['entity_types', 'entity_field_info']);
+      }
+    }
+    return $this->baseFieldDefinitions[$entity_type_id];
+  }
+
+  /**
+   * Builds base field definitions for an entity type.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID. Only entity types that implement
+   *   \Drupal\Core\Entity\FieldableEntityInterface are supported.
+   *
+   * @return \Drupal\Core\Field\FieldDefinitionInterface[]
+   *   An array of field definitions, keyed by field name.
+   *
+   * @throws \LogicException
+   *   Thrown if a config entity type is given or if one of the entity keys is
+   *   flagged as translatable.
+   */
+  protected function buildBaseFieldDefinitions($entity_type_id) {
+    $entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
+    $class = $entity_type->getClass();
+    $keys = array_filter($entity_type->getKeys());
+
+    // Fail with an exception for non-fieldable entity types.
+    if (!$entity_type->entityClassImplements(FieldableEntityInterface::class)) {
+      throw new \LogicException("Getting the base fields is not supported for entity type {$entity_type->getLabel()}.");
+    }
+
+    // Retrieve base field definitions.
+    /** @var \Drupal\Core\Field\FieldStorageDefinitionInterface[] $base_field_definitions */
+    $base_field_definitions = $class::baseFieldDefinitions($entity_type);
+
+    // Make sure translatable entity types are correctly defined.
+    if ($entity_type->isTranslatable()) {
+      // The langcode field should always be translatable if the entity type is.
+      if (isset($keys['langcode']) && isset($base_field_definitions[$keys['langcode']])) {
+        $base_field_definitions[$keys['langcode']]->setTranslatable(TRUE);
+      }
+      // A default_langcode field should always be defined.
+      if (!isset($base_field_definitions[$keys['default_langcode']])) {
+        $base_field_definitions[$keys['default_langcode']] = BaseFieldDefinition::create('boolean')
+          ->setLabel($this->t('Default translation'))
+          ->setDescription($this->t('A flag indicating whether this is the default translation.'))
+          ->setTranslatable(TRUE)
+          ->setRevisionable(TRUE)
+          ->setDefaultValue(TRUE);
+      }
+    }
+
+    // Make sure that revisionable entity types are correctly defined.
+    if ($entity_type->isRevisionable() && $entity_type->isTranslatable()) {
+      // The 'revision_translation_affected' field should always be defined.
+      // This field has been added unconditionally in Drupal 8.4.0 and it is
+      // overriding any pre-existing definition on purpose so that any
+      // differences are immediately available in the status report.
+      $base_field_definitions[$keys['revision_translation_affected']] = BaseFieldDefinition::create('boolean')
+        ->setLabel($this->t('Revision translation affected'))
+        ->setDescription($this->t('Indicates if the last edit of a translation belongs to current revision.'))
+        ->setReadOnly(TRUE)
+        ->setRevisionable(TRUE)
+        ->setTranslatable(TRUE);
+    }
+
+    // Assign base field definitions the entity type provider.
+    $provider = $entity_type->getProvider();
+    foreach ($base_field_definitions as $definition) {
+      // @todo Remove this check once FieldDefinitionInterface exposes a proper
+      //  provider setter. See https://www.drupal.org/node/2225961.
+      if ($definition instanceof BaseFieldDefinition) {
+        $definition->setProvider($provider);
+      }
+    }
+
+    // Retrieve base field definitions from modules.
+    foreach ($this->moduleHandler->getImplementations('entity_base_field_info') as $module) {
+      $module_definitions = $this->moduleHandler->invoke($module, 'entity_base_field_info', [$entity_type]);
+      if (!empty($module_definitions)) {
+        // Ensure the provider key actually matches the name of the provider
+        // defining the field.
+        foreach ($module_definitions as $field_name => $definition) {
+          // @todo Remove this check once FieldDefinitionInterface exposes a
+          //  proper provider setter. See https://www.drupal.org/node/2225961.
+          if ($definition instanceof BaseFieldDefinition && $definition->getProvider() == NULL) {
+            $definition->setProvider($module);
+          }
+          $base_field_definitions[$field_name] = $definition;
+        }
+      }
+    }
+
+    // Automatically set the field name, target entity type and bundle
+    // for non-configurable fields.
+    foreach ($base_field_definitions as $field_name => $base_field_definition) {
+      if ($base_field_definition instanceof BaseFieldDefinition) {
+        $base_field_definition->setName($field_name);
+        $base_field_definition->setTargetEntityTypeId($entity_type_id);
+        $base_field_definition->setTargetBundle(NULL);
+      }
+    }
+
+    // Invoke alter hook.
+    $this->moduleHandler->alter('entity_base_field_info', $base_field_definitions, $entity_type);
+
+    // Ensure defined entity keys are there and have proper revisionable and
+    // translatable values.
+    foreach (array_intersect_key($keys, array_flip(['id', 'revision', 'uuid', 'bundle'])) as $key => $field_name) {
+      if (!isset($base_field_definitions[$field_name])) {
+        throw new \LogicException("The $field_name field definition does not exist and it is used as $key entity key.");
+      }
+      if ($base_field_definitions[$field_name]->isRevisionable()) {
+        throw new \LogicException("The {$base_field_definitions[$field_name]->getLabel()} field cannot be revisionable as it is used as $key entity key.");
+      }
+      if ($base_field_definitions[$field_name]->isTranslatable()) {
+        throw new \LogicException("The {$base_field_definitions[$field_name]->getLabel()} field cannot be translatable as it is used as $key entity key.");
+      }
+    }
+
+    // Make sure translatable entity types define the "langcode" field properly.
+    if ($entity_type->isTranslatable() && (!isset($keys['langcode']) || !isset($base_field_definitions[$keys['langcode']]) || !$base_field_definitions[$keys['langcode']]->isTranslatable())) {
+      throw new \LogicException("The {$entity_type->getLabel()} entity type cannot be translatable as it does not define a translatable \"langcode\" field.");
+    }
+
+    return $base_field_definitions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldDefinitions($entity_type_id, $bundle) {
+    if (!isset($this->fieldDefinitions[$entity_type_id][$bundle])) {
+      $base_field_definitions = $this->getBaseFieldDefinitions($entity_type_id);
+      // Not prepared, try to load from cache.
+      $cid = 'entity_bundle_field_definitions:' . $entity_type_id . ':' . $bundle . ':' . $this->languageManager->getCurrentLanguage()->getId();
+      if ($cache = $this->cacheGet($cid)) {
+        $bundle_field_definitions = $cache->data;
+      }
+      else {
+        // Rebuild the definitions and put it into the cache.
+        $bundle_field_definitions = $this->buildBundleFieldDefinitions($entity_type_id, $bundle, $base_field_definitions);
+        $this->cacheSet($cid, $bundle_field_definitions, Cache::PERMANENT, ['entity_types', 'entity_field_info']);
+      }
+      // Field definitions consist of the bundle specific overrides and the
+      // base fields, merge them together. Use array_replace() to replace base
+      // fields with by bundle overrides and keep them in order, append
+      // additional by bundle fields.
+      $this->fieldDefinitions[$entity_type_id][$bundle] = array_replace($base_field_definitions, $bundle_field_definitions);
+    }
+    return $this->fieldDefinitions[$entity_type_id][$bundle];
+  }
+
+  /**
+   * Builds field definitions for a specific bundle within an entity type.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID. Only entity types that implement
+   *   \Drupal\Core\Entity\FieldableEntityInterface are supported.
+   * @param string $bundle
+   *   The bundle.
+   * @param \Drupal\Core\Field\FieldDefinitionInterface[] $base_field_definitions
+   *   The list of base field definitions.
+   *
+   * @return \Drupal\Core\Field\FieldDefinitionInterface[]
+   *   An array of bundle field definitions, keyed by field name. Does
+   *   not include base fields.
+   */
+  protected function buildBundleFieldDefinitions($entity_type_id, $bundle, array $base_field_definitions) {
+    $entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
+    $class = $entity_type->getClass();
+
+    // Allow the entity class to provide bundle fields and bundle-specific
+    // overrides of base fields.
+    $bundle_field_definitions = $class::bundleFieldDefinitions($entity_type, $bundle, $base_field_definitions);
+
+    // Load base field overrides from configuration. These take precedence over
+    // base field overrides returned above.
+    $base_field_override_ids = array_map(function ($field_name) use ($entity_type_id, $bundle) {
+      return $entity_type_id . '.' . $bundle . '.' . $field_name;
+    }, array_keys($base_field_definitions));
+    $base_field_overrides = $this->entityTypeManager->getStorage('base_field_override')->loadMultiple($base_field_override_ids);
+    foreach ($base_field_overrides as $base_field_override) {
+      /** @var \Drupal\Core\Field\Entity\BaseFieldOverride $base_field_override */
+      $field_name = $base_field_override->getName();
+      $bundle_field_definitions[$field_name] = $base_field_override;
+    }
+
+    $provider = $entity_type->getProvider();
+    foreach ($bundle_field_definitions as $definition) {
+      // @todo Remove this check once FieldDefinitionInterface exposes a proper
+      //  provider setter. See https://www.drupal.org/node/2225961.
+      if ($definition instanceof BaseFieldDefinition) {
+        $definition->setProvider($provider);
+      }
+    }
+
+    // Retrieve base field definitions from modules.
+    foreach ($this->moduleHandler->getImplementations('entity_bundle_field_info') as $module) {
+      $module_definitions = $this->moduleHandler->invoke($module, 'entity_bundle_field_info', [$entity_type, $bundle, $base_field_definitions]);
+      if (!empty($module_definitions)) {
+        // Ensure the provider key actually matches the name of the provider
+        // defining the field.
+        foreach ($module_definitions as $field_name => $definition) {
+          // @todo Remove this check once FieldDefinitionInterface exposes a
+          //  proper provider setter. See https://www.drupal.org/node/2225961.
+          if ($definition instanceof BaseFieldDefinition) {
+            $definition->setProvider($module);
+          }
+          $bundle_field_definitions[$field_name] = $definition;
+        }
+      }
+    }
+
+    // Automatically set the field name, target entity type and bundle
+    // for non-configurable fields.
+    foreach ($bundle_field_definitions as $field_name => $field_definition) {
+      if ($field_definition instanceof BaseFieldDefinition) {
+        $field_definition->setName($field_name);
+        $field_definition->setTargetEntityTypeId($entity_type_id);
+        $field_definition->setTargetBundle($bundle);
+      }
+    }
+
+    // Invoke 'per bundle' alter hook.
+    $this->moduleHandler->alter('entity_bundle_field_info', $bundle_field_definitions, $entity_type, $bundle);
+
+    return $bundle_field_definitions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldStorageDefinitions($entity_type_id) {
+    if (!isset($this->fieldStorageDefinitions[$entity_type_id])) {
+      $this->fieldStorageDefinitions[$entity_type_id] = [];
+      // Add all non-computed base fields.
+      foreach ($this->getBaseFieldDefinitions($entity_type_id) as $field_name => $definition) {
+        if (!$definition->isComputed()) {
+          $this->fieldStorageDefinitions[$entity_type_id][$field_name] = $definition;
+        }
+      }
+      // Not prepared, try to load from cache.
+      $cid = 'entity_field_storage_definitions:' . $entity_type_id . ':' . $this->languageManager->getCurrentLanguage()->getId();
+      if ($cache = $this->cacheGet($cid)) {
+        $field_storage_definitions = $cache->data;
+      }
+      else {
+        // Rebuild the definitions and put it into the cache.
+        $field_storage_definitions = $this->buildFieldStorageDefinitions($entity_type_id);
+        $this->cacheSet($cid, $field_storage_definitions, Cache::PERMANENT, ['entity_types', 'entity_field_info']);
+      }
+      $this->fieldStorageDefinitions[$entity_type_id] += $field_storage_definitions;
+    }
+    return $this->fieldStorageDefinitions[$entity_type_id];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setFieldMap(array $field_map) {
+    $this->fieldMap = $field_map;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldMap() {
+    if (!$this->fieldMap) {
+      // Not prepared, try to load from cache.
+      $cid = 'entity_field_map';
+      if ($cache = $this->cacheGet($cid)) {
+        $this->fieldMap = $cache->data;
+      }
+      else {
+        // The field map is built in two steps. First, add all base fields, by
+        // looping over all fieldable entity types. They always exist for all
+        // bundles, and we do not expect to have so many different entity
+        // types for this to become a bottleneck.
+        foreach ($this->entityTypeManager->getDefinitions() as $entity_type_id => $entity_type) {
+          if ($entity_type->entityClassImplements(FieldableEntityInterface::class)) {
+            $bundles = array_keys($this->entityTypeBundleInfo->getBundleInfo($entity_type_id));
+            foreach ($this->getBaseFieldDefinitions($entity_type_id) as $field_name => $base_field_definition) {
+              $this->fieldMap[$entity_type_id][$field_name] = [
+                'type' => $base_field_definition->getType(),
+                'bundles' => array_combine($bundles, $bundles),
+              ];
+            }
+          }
+        }
+
+        // In the second step, the per-bundle fields are added, based on the
+        // persistent bundle field map stored in a key value collection. This
+        // data is managed in the EntityManager::onFieldDefinitionCreate()
+        // and EntityManager::onFieldDefinitionDelete() methods. Rebuilding this
+        // information in the same way as base fields would not scale, as the
+        // time to query would grow exponentially with more fields and bundles.
+        // A cache would be deleted during cache clears, which is the only time
+        // it is needed, so a key value collection is used.
+        $bundle_field_maps = $this->keyValueFactory->get('entity.definitions.bundle_field_map')->getAll();
+        foreach ($bundle_field_maps as $entity_type_id => $bundle_field_map) {
+          foreach ($bundle_field_map as $field_name => $map_entry) {
+            if (!isset($this->fieldMap[$entity_type_id][$field_name])) {
+              $this->fieldMap[$entity_type_id][$field_name] = $map_entry;
+            }
+            else {
+              $this->fieldMap[$entity_type_id][$field_name]['bundles'] += $map_entry['bundles'];
+            }
+          }
+        }
+
+        $this->cacheSet($cid, $this->fieldMap, Cache::PERMANENT, ['entity_types']);
+      }
+    }
+    return $this->fieldMap;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldMapByFieldType($field_type) {
+    if (!isset($this->fieldMapByFieldType[$field_type])) {
+      $filtered_map = [];
+      $map = $this->getFieldMap();
+      foreach ($map as $entity_type => $fields) {
+        foreach ($fields as $field_name => $field_info) {
+          if ($field_info['type'] == $field_type) {
+            $filtered_map[$entity_type][$field_name] = $field_info;
+          }
+        }
+      }
+      $this->fieldMapByFieldType[$field_type] = $filtered_map;
+    }
+    return $this->fieldMapByFieldType[$field_type];
+  }
+
+  /**
+   * Builds field storage definitions for an entity type.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID. Only entity types that implement
+   *   \Drupal\Core\Entity\FieldableEntityInterface are supported
+   *
+   * @return \Drupal\Core\Field\FieldStorageDefinitionInterface[]
+   *   An array of field storage definitions, keyed by field name.
+   */
+  protected function buildFieldStorageDefinitions($entity_type_id) {
+    $entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
+    $field_definitions = [];
+
+    // Retrieve base field definitions from modules.
+    foreach ($this->moduleHandler->getImplementations('entity_field_storage_info') as $module) {
+      $module_definitions = $this->moduleHandler->invoke($module, 'entity_field_storage_info', [$entity_type]);
+      if (!empty($module_definitions)) {
+        // Ensure the provider key actually matches the name of the provider
+        // defining the field.
+        foreach ($module_definitions as $field_name => $definition) {
+          // @todo Remove this check once FieldDefinitionInterface exposes a
+          //  proper provider setter. See https://www.drupal.org/node/2225961.
+          if ($definition instanceof BaseFieldDefinition) {
+            $definition->setProvider($module);
+          }
+          $field_definitions[$field_name] = $definition;
+        }
+      }
+    }
+
+    // Invoke alter hook.
+    $this->moduleHandler->alter('entity_field_storage_info', $field_definitions, $entity_type);
+
+    return $field_definitions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function clearCachedFieldDefinitions() {
+    $this->baseFieldDefinitions = [];
+    $this->fieldDefinitions = [];
+    $this->fieldStorageDefinitions = [];
+    $this->fieldMap = [];
+    $this->fieldMapByFieldType = [];
+    $this->entityDisplayRepository->clearDisplayModeInfo();
+    $this->extraFields = [];
+    Cache::invalidateTags(['entity_field_info']);
+    // The typed data manager statically caches prototype objects with injected
+    // definitions, clear those as well.
+    $this->typedDataManager->clearCachedDefinitions();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function useCaches($use_caches = FALSE) {
+    $this->useCaches = $use_caches;
+    if (!$use_caches) {
+      $this->fieldDefinitions = [];
+      $this->baseFieldDefinitions = [];
+      $this->fieldStorageDefinitions = [];
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getExtraFields($entity_type_id, $bundle) {
+    // Read from the "static" cache.
+    if (isset($this->extraFields[$entity_type_id][$bundle])) {
+      return $this->extraFields[$entity_type_id][$bundle];
+    }
+
+    // Read from the persistent cache. Since hook_entity_extra_field_info() and
+    // hook_entity_extra_field_info_alter() might contain t() calls, we cache
+    // per language.
+    $cache_id = 'entity_bundle_extra_fields:' . $entity_type_id . ':' . $bundle . ':' . $this->languageManager->getCurrentLanguage()->getId();
+    $cached = $this->cacheGet($cache_id);
+    if ($cached) {
+      $this->extraFields[$entity_type_id][$bundle] = $cached->data;
+      return $this->extraFields[$entity_type_id][$bundle];
+    }
+
+    $extra = $this->moduleHandler->invokeAll('entity_extra_field_info');
+    $this->moduleHandler->alter('entity_extra_field_info', $extra);
+    $info = isset($extra[$entity_type_id][$bundle]) ? $extra[$entity_type_id][$bundle] : [];
+    $info += [
+      'form' => [],
+      'display' => [],
+    ];
+
+    // Store in the 'static' and persistent caches.
+    $this->extraFields[$entity_type_id][$bundle] = $info;
+    $this->cacheSet($cache_id, $info, Cache::PERMANENT, [
+      'entity_field_info',
+    ]);
+
+    return $this->extraFields[$entity_type_id][$bundle];
+  }
+
+}