Set proper encoding format

src/bundle/Resources/config/services.yml

@@ -324,6 +324,7 @@ services:
             $normalizer: '@ibexa.rest.serializer'
             $encoder: '@ibexa.rest.serializer.encoder.json'
             $valueObjectVisitorResolver: '@Ibexa\Contracts\Rest\Output\ValueObjectVisitorResolver'
+            $format: 'json'
         tags:
             - { name: ibexa.rest.output.visitor, regexps: ibexa.rest.output.visitor.json.regexps }
 
@@ -334,6 +335,7 @@ services:
             $normalizer: '@ibexa.rest.serializer'
             $encoder: '@ibexa.rest.serializer.encoder.xml'
             $valueObjectVisitorResolver: '@Ibexa\Contracts\Rest\Output\ValueObjectVisitorResolver'
+            $format: 'xml'
         tags:
             - { name: ibexa.rest.output.visitor, regexps: ibexa.rest.output.visitor.xml.regexps }
 

src/contracts/Output/Visitor.php

@@ -33,6 +33,7 @@ public function __construct(
         private readonly NormalizerInterface $normalizer,
         private readonly EncoderInterface $encoder,
         private readonly ValueObjectVisitorResolverInterface $valueObjectVisitorResolver,
+        private readonly string $format,
     ) {
         $this->response = new Response('', 200);
     }
@@ -88,7 +89,7 @@ public function visit(mixed $data): Response
 
         $response = clone $this->response;
 
-        $response->setContent($this->encoder->encode($normalizedData, 'json'));
+        $response->setContent($this->encoder->encode($normalizedData, $this->format));
 
         // reset the inner response
         $this->response = new Response(null, Response::HTTP_OK);

src/contracts/Output/VisitorAdapterNormalizer.php

@@ -107,6 +107,7 @@ private function createVisitor(): Visitor
             $this->normalizer,
             $this->encoder,
             $this->valueObjectVisitorResolver,
+            'json',
         );
     }
 }