abstract class NormalizerBase in Drupal 8

Base class for Normalizers.

Hierarchy

• class \Drupal\serialization\Normalizer\NormalizerBase implements \Symfony\Component\Serializer\SerializerAwareInterface, CacheableNormalizerInterface uses \Symfony\Component\Serializer\SerializerAwareTrait

6 files declare their use of NormalizerBase

BooleanNormalizer.php in core/modules/serialization/tests/modules/test_datatype_boolean_emoji_normalizer/src/Normalizer/BooleanNormalizer.php

NormalizerBase.php in core/modules/jsonapi/src/Normalizer/NormalizerBase.php

NormalizerBase.php in core/modules/hal/src/Normalizer/NormalizerBase.php

NormalizerBaseTest.php in core/modules/serialization/tests/src/Unit/Normalizer/NormalizerBaseTest.php

Contains \Drupal\Tests\serialization\Unit\Normalizer\NormalizerBaseTest.

StringNormalizer.php in core/modules/jsonapi/tests/modules/jsonapi_test_data_type/src/Normalizer/StringNormalizer.php

... See full list

File

core/modules/serialization/src/Normalizer/NormalizerBase.php, line 12

Namespace

Drupal\serialization\Normalizer

abstract class NormalizerBase implements SerializerAwareInterface, CacheableNormalizerInterface {
  use SerializerAwareTrait;

  /**
   * The interface or class that this Normalizer supports.
   *
   * @var string|array
   */
  protected $supportedInterfaceOrClass;

  /**
   * List of formats which supports (de-)normalization.
   *
   * @var string|string[]
   */
  protected $format;

  /**
   * {@inheritdoc}
   */
  public function supportsNormalization($data, $format = NULL) {

    // If we aren't dealing with an object or the format is not supported return
    // now.
    if (!is_object($data) || !$this
      ->checkFormat($format)) {
      return FALSE;
    }
    $supported = (array) $this->supportedInterfaceOrClass;
    return (bool) array_filter($supported, function ($name) use ($data) {
      return $data instanceof $name;
    });
  }

  /**
   * Implements \Symfony\Component\Serializer\Normalizer\DenormalizerInterface::supportsDenormalization()
   *
   * This class doesn't implement DenormalizerInterface, but most of its child
   * classes do. Therefore, this method is implemented at this level to reduce
   * code duplication.
   */
  public function supportsDenormalization($data, $type, $format = NULL) {

    // If the format is not supported return now.
    if (!$this
      ->checkFormat($format)) {
      return FALSE;
    }
    $supported = (array) $this->supportedInterfaceOrClass;
    $subclass_check = function ($name) use ($type) {
      return (class_exists($name) || interface_exists($name)) && is_subclass_of($type, $name, TRUE);
    };
    return in_array($type, $supported) || array_filter($supported, $subclass_check);
  }

  /**
   * Checks if the provided format is supported by this normalizer.
   *
   * @param string $format
   *   The format to check.
   *
   * @return bool
   *   TRUE if the format is supported, FALSE otherwise. If no format is
   *   specified this will return TRUE.
   */
  protected function checkFormat($format = NULL) {
    if (!isset($format) || !isset($this->format)) {
      return TRUE;
    }
    return in_array($format, (array) $this->format, TRUE);
  }

  /**
   * Adds cacheability if applicable.
   *
   * @param array $context
   *   Context options for the normalizer.
   * @param $data
   *   The data that might have cacheability information.
   */
  protected function addCacheableDependency(array $context, $data) {
    if ($data instanceof CacheableDependencyInterface && isset($context[static::SERIALIZATION_CONTEXT_CACHEABILITY])) {
      $context[static::SERIALIZATION_CONTEXT_CACHEABILITY]
        ->addCacheableDependency($data);
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
CacheableNormalizerInterface::SERIALIZATION_CONTEXT_CACHEABILITY		constant	Name of key for bubbling cacheability metadata via serialization context.
NormalizerBase::$format	protected	property	List of formats which supports (de-)normalization.	3
NormalizerBase::$supportedInterfaceOrClass	protected	property	The interface or class that this Normalizer supports.	22
NormalizerBase::addCacheableDependency	protected	function	Adds cacheability if applicable.
NormalizerBase::checkFormat	protected	function	Checks if the provided format is supported by this normalizer.	2
NormalizerBase::supportsDenormalization	public	function	Implements \Symfony\Component\Serializer\Normalizer\DenormalizerInterface::supportsDenormalization()	1
NormalizerBase::supportsNormalization	public	function	Checks whether the given class is supported for normalization by this normalizer.	1