class ContentEntityDenormalizer

final class ContentEntityDenormalizer extends EntityDenormalizerBase {
    
    /**
     * {@inheritdoc}
     */
    protected $supportedInterfaceOrClass = ContentEntityInterface::class;
    
    /**
     * Prepares the input data to create the entity.
     *
     * @param array $data
     *   The input data to modify.
     * @param \Drupal\jsonapi\ResourceType\ResourceType $resource_type
     *   Contains the info about the resource type.
     * @param string $format
     *   Format the given data was extracted from.
     * @param array $context
     *   Options available to the denormalizer.
     *
     * @return array
     *   The modified input data.
     */
    protected function prepareInput(array $data, ResourceType $resource_type, $format, array $context) {
        $data_internal = [];
        $field_map = $this->fieldManager
            ->getFieldMap()[$resource_type->getEntityTypeId()];
        $entity_type_id = $resource_type->getEntityTypeId();
        $entity_type_definition = $this->entityTypeManager
            ->getDefinition($entity_type_id);
        $bundle_key = $entity_type_definition->getKey('bundle');
        $uuid_key = $entity_type_definition->getKey('uuid');
        // User resource objects contain a read-only attribute that is not a real
        // field on the user entity type.
        // @see \Drupal\jsonapi\JsonApiResource\ResourceObject::extractContentEntityFields()
        // @todo: eliminate this special casing in https://www.drupal.org/project/drupal/issues/3079254.
        if ($entity_type_id === 'user') {
            $data = array_diff_key($data, array_flip([
                $resource_type->getPublicName('display_name'),
            ]));
        }
        // Translate the public fields into the entity fields.
        foreach ($data as $public_field_name => $field_value) {
            $internal_name = $resource_type->getInternalName($public_field_name);
            // Skip any disabled field, except the always required bundle key and
            // required-in-case-of-PATCHing uuid key.
            // @see \Drupal\jsonapi\ResourceType\ResourceTypeRepository::getFieldMapping()
            if ($resource_type->hasField($internal_name) && !$resource_type->isFieldEnabled($internal_name) && $bundle_key !== $internal_name && $uuid_key !== $internal_name) {
                continue;
            }
            if (!isset($field_map[$internal_name]) || !in_array($resource_type->getBundle(), $field_map[$internal_name]['bundles'], TRUE)) {
                throw new UnprocessableEntityHttpException(sprintf('The attribute %s does not exist on the %s resource type.', $internal_name, $resource_type->getTypeName()));
            }
            $field_type = $field_map[$internal_name]['type'];
            $field_class = $this->pluginManager
                ->getDefinition($field_type)['list_class'];
            $field_denormalization_context = array_merge($context, [
                'field_type' => $field_type,
                'field_name' => $internal_name,
                'field_definition' => $this->fieldManager
                    ->getFieldDefinitions($resource_type->getEntityTypeId(), $resource_type->getBundle())[$internal_name],
            ]);
            $data_internal[$internal_name] = $this->serializer
                ->denormalize($field_value, $field_class, $format, $field_denormalization_context);
        }
        return $data_internal;
    }
    
    /**
     * {@inheritdoc}
     */
    public function hasCacheableSupportsMethod() : bool {
        return TRUE;
    }

}