public function DependencySerializationTrait::__sleep in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/DependencyInjection/DependencySerializationTrait.php \Drupal\Core\DependencyInjection\DependencySerializationTrait::__sleep()

4 calls to DependencySerializationTrait::__sleep()

EntityBase::__sleep in core/lib/Drupal/Core/Entity/EntityBase.php

ForumManager::__sleep in core/modules/forum/src/ForumManager.php

SqlBase::__sleep in core/modules/migrate/src/Plugin/migrate/source/SqlBase.php

TermStorage::__sleep in core/modules/taxonomy/src/TermStorage.php

2 methods override DependencySerializationTrait::__sleep()

SqlBase::__sleep in core/modules/migrate/src/Plugin/migrate/source/SqlBase.php

TermStorage::__sleep in core/modules/taxonomy/src/TermStorage.php

File

core/lib/Drupal/Core/DependencyInjection/DependencySerializationTrait.php, line 32

Class

DependencySerializationTrait

Provides dependency injection friendly methods for serialization.

Namespace

Drupal\Core\DependencyInjection

Code

public function __sleep() {
  $this->_serviceIds = [];
  $vars = get_object_vars($this);
  foreach ($vars as $key => $value) {
    if (is_object($value) && isset($value->_serviceId)) {

      // If a class member was instantiated by the dependency injection
      // container, only store its ID so it can be used to get a fresh object
      // on unserialization.
      $this->_serviceIds[$key] = $value->_serviceId;
      unset($vars[$key]);
    }
    elseif ($value instanceof ContainerInterface) {
      $this->_serviceIds[$key] = 'service_container';
      unset($vars[$key]);
    }
    elseif ($value instanceof EntityStorageInterface) {

      // If a class member is an entity storage, only store the entity type ID
      // the storage is for so it can be used to get a fresh object on
      // unserialization. By doing this we prevent possible memory leaks when
      // the storage is serialized when it contains a static cache of entity
      // objects and additionally we ensure that we'll not have multiple
      // storage objects for the same entity type and therefore prevent
      // returning different references for the same entity.
      $this->_entityStorages[$key] = $value
        ->getEntityTypeId();
      unset($vars[$key]);
    }
  }
  return array_keys($vars);
}