fix(serializer): json non-resource intermittent class (HAL & JSON:API) (#6231)

Author: GwendolenLynch

Diff for: features/issues/5926.feature

@@ -10,3 +10,27 @@ Feature: Issue 5926
     Then the response status code should be 200
     And the response should be in JSON
     And the header "Content-Type" should be equal to "application/json; charset=utf-8"
+
+  @!mongodb
+  Scenario: Create and retrieve a JSON:API WriteResource
+    When I add "Accept" header equal to "application/vnd.api+json"
+    And I send a "GET" request to "/test_issue5926s/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/vnd.api+json; charset=utf-8"
+
+  @!mongodb
+  Scenario: Create and retrieve a LD+JSON WriteResource
+    When I add "Accept" header equal to "application/ld+json"
+    And I send a "GET" request to "/test_issue5926s/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/ld+json; charset=utf-8"
+
+  @!mongodb
+  Scenario: Create and retrieve a HAL WriteResource
+    When I add "Accept" header equal to "application/hal+json"
+    And I send a "GET" request to "/test_issue5926s/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the header "Content-Type" should be equal to "application/hal+json; charset=utf-8"

Diff for: src/Hal/Serializer/ItemNormalizer.php

@@ -61,8 +61,9 @@ public function normalize(mixed $object, ?string $format = null, array $context
             return parent::normalize($object, $format, $context);
         }
 
-        if ($this->resourceClassResolver->isResourceClass($resourceClass)) {
-            $resourceClass = $this->resourceClassResolver->getResourceClass($object, $context['resource_class'] ?? null);
+        $previousResourceClass = $context['resource_class'] ?? null;
+        if ($this->resourceClassResolver->isResourceClass($resourceClass) && (null === $previousResourceClass || $this->resourceClassResolver->isResourceClass($previousResourceClass))) {
+            $resourceClass = $this->resourceClassResolver->getResourceClass($object, $previousResourceClass);
         }
 
         $context = $this->initContext($resourceClass, $context);

Diff for: src/JsonApi/Serializer/ItemNormalizer.php

@@ -83,8 +83,9 @@ public function normalize(mixed $object, ?string $format = null, array $context
             return parent::normalize($object, $format, $context);
         }
 
-        if ($this->resourceClassResolver->isResourceClass($resourceClass)) {
-            $resourceClass = $this->resourceClassResolver->getResourceClass($object, $context['resource_class'] ?? null);
+        $previousResourceClass = $context['resource_class'] ?? null;
+        if ($this->resourceClassResolver->isResourceClass($resourceClass) && (null === $previousResourceClass || $this->resourceClassResolver->isResourceClass($previousResourceClass))) {
+            $resourceClass = $this->resourceClassResolver->getResourceClass($object, $previousResourceClass);
         }
 
         if (($operation = $context['operation'] ?? null) && method_exists($operation, 'getItemUriTemplate')) {