Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\serialization\EntityResolver;
Chris@0: 
Chris@0: use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Resolver delegating the entity resolution to a chain of resolvers.
Chris@0:  */
Chris@0: class ChainEntityResolver implements ChainEntityResolverInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The concrete resolvers.
Chris@0:    *
Chris@0:    * @var \Drupal\serialization\EntityResolver\EntityResolverInterface[]
Chris@0:    */
Chris@0:   protected $resolvers = [];
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a ChainEntityResolver object.
Chris@0:    *
Chris@0:    * @param \Drupal\serialization\EntityResolver\EntityResolverInterface[] $resolvers
Chris@0:    *   The array of concrete resolvers.
Chris@0:    */
Chris@0:   public function __construct(array $resolvers = []) {
Chris@0:     $this->resolvers = $resolvers;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function addResolver(EntityResolverInterface $resolver) {
Chris@0:     $this->resolvers[] = $resolver;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function resolve(NormalizerInterface $normalizer, $data, $entity_type) {
Chris@0:     foreach ($this->resolvers as $resolver) {
Chris@0:       $resolved = $resolver->resolve($normalizer, $data, $entity_type);
Chris@0:       if (isset($resolved)) {
Chris@0:         return $resolved;
Chris@0:       }
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0: }