NullNormalizer.php

<?php

namespace Drupal\serialization\Normalizer;


/**
 * Null normalizer.
 */
class NullNormalizer extends NormalizerBase {
  
  /**
   * The interface or class that this Normalizer supports.
   *
   * @var string[]
   */
  protected array $supportedTypes = [
    '*' => FALSE,
  ];
  
  /**
   * Constructs a NullNormalizer object.
   *
   * @param string|array $supported_interface_of_class
   *   The supported interface(s) or class(es).
   */
  public function __construct($supported_interface_of_class) {
    $this->supportedTypes = [
      $supported_interface_of_class => TRUE,
    ];
  }
  
  /**
   * {@inheritdoc}
   */
  public function normalize($object, $format = NULL, array $context = []) : array|string|int|float|bool|\ArrayObject|null {
    return NULL;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getSupportedTypes(?string $format) : array {
    return $this->supportedTypes;
  }

}