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- <?php
- namespace Drupal\Core\Entity;
- /**
- * Provides an implementation of a content entity type and its metadata.
- */
- class ContentEntityType extends EntityType implements ContentEntityTypeInterface {
- /**
- * An array of entity revision metadata keys.
- *
- * @var array
- */
- protected $revision_metadata_keys = [];
- /**
- * The required revision metadata keys.
- *
- * This property should only be filled in the constructor. This ensures that
- * only new instances get newly added required revision metadata keys.
- * Unserialized objects will only retrieve the keys that they already have
- * been cached with.
- *
- * @var array
- */
- protected $requiredRevisionMetadataKeys = [];
- /**
- * {@inheritdoc}
- */
- public function __construct($definition) {
- parent::__construct($definition);
- $this->handlers += [
- 'storage' => 'Drupal\Core\Entity\Sql\SqlContentEntityStorage',
- 'view_builder' => 'Drupal\Core\Entity\EntityViewBuilder',
- ];
- // Only new instances should provide the required revision metadata keys.
- // The cached instances should return only what already has been stored
- // under the property $revision_metadata_keys. The BC layer in
- // ::getRevisionMetadataKeys() has to detect if the revision metadata keys
- // have been provided by the entity type annotation, therefore we add keys
- // to the property $requiredRevisionMetadataKeys only if those keys aren't
- // set in the entity type annotation.
- if (!isset($this->revision_metadata_keys['revision_default'])) {
- $this->requiredRevisionMetadataKeys['revision_default'] = 'revision_default';
- }
- // Add the required revision metadata fields here instead in the getter
- // method, so that they are serialized as part of the object even if the
- // getter method doesn't get called. This allows the list to be further
- // extended. Only new instances of the class will contain the new list,
- // while the cached instances contain the previous version of the list.
- $this->revision_metadata_keys += $this->requiredRevisionMetadataKeys;
- }
- /**
- * {@inheritdoc}
- */
- public function getConfigDependencyKey() {
- return 'content';
- }
- /**
- * {@inheritdoc}
- *
- * @throws \InvalidArgumentException
- * If the provided class does not implement
- * \Drupal\Core\Entity\ContentEntityStorageInterface.
- *
- * @see \Drupal\Core\Entity\ContentEntityStorageInterface
- */
- protected function checkStorageClass($class) {
- $required_interface = ContentEntityStorageInterface::class;
- if (!is_subclass_of($class, $required_interface)) {
- throw new \InvalidArgumentException("$class does not implement $required_interface");
- }
- }
- /**
- * {@inheritdoc}
- */
- public function getRevisionMetadataKeys($include_backwards_compatibility_field_names = TRUE) {
- // Provide backwards compatibility in case the revision metadata keys are
- // not defined in the entity annotation.
- if ((!$this->revision_metadata_keys || ($this->revision_metadata_keys == $this->requiredRevisionMetadataKeys)) && $include_backwards_compatibility_field_names) {
- $base_fields = \Drupal::service('entity_field.manager')->getBaseFieldDefinitions($this->id());
- if ((isset($base_fields['revision_uid']) && $revision_user = 'revision_uid') || (isset($base_fields['revision_user']) && $revision_user = 'revision_user')) {
- @trigger_error('The revision_user revision metadata key is not set.', E_USER_DEPRECATED);
- $this->revision_metadata_keys['revision_user'] = $revision_user;
- }
- if ((isset($base_fields['revision_timestamp']) && $revision_timestamp = 'revision_timestamp') || (isset($base_fields['revision_created'])) && $revision_timestamp = 'revision_created') {
- @trigger_error('The revision_created revision metadata key is not set.', E_USER_DEPRECATED);
- $this->revision_metadata_keys['revision_created'] = $revision_timestamp;
- }
- if ((isset($base_fields['revision_log']) && $revision_log = 'revision_log') || (isset($base_fields['revision_log_message']) && $revision_log = 'revision_log_message')) {
- @trigger_error('The revision_log_message revision metadata key is not set.', E_USER_DEPRECATED);
- $this->revision_metadata_keys['revision_log_message'] = $revision_log;
- }
- }
- return $this->revision_metadata_keys;
- }
- /**
- * {@inheritdoc}
- */
- public function getRevisionMetadataKey($key) {
- $keys = $this->getRevisionMetadataKeys();
- return isset($keys[$key]) ? $keys[$key] : FALSE;
- }
- /**
- * {@inheritdoc}
- */
- public function hasRevisionMetadataKey($key) {
- $keys = $this->getRevisionMetadataKeys();
- return isset($keys[$key]);
- }
- }
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