Improve class discriminator

Author: SerafimArts

src/Type/ClassType/ClassTypeDenormalizer.php

@@ -33,7 +33,7 @@ public function __construct(
         protected readonly PropertyAccessorInterface $accessor,
         protected readonly ClassInstantiatorInterface $instantiator,
     ) {
-        $this->discriminator = new DiscriminatorTypeSelector();
+        $this->discriminator = new DiscriminatorTypeSelector($metadata);
     }
 
     public function match(mixed $value, Context $context): bool
@@ -110,7 +110,7 @@ public function cast(mixed $value, Context $context): mixed
             );
         }
 
-        $discriminator = $this->discriminator->select($this->metadata, $value, $context);
+        $discriminator = $this->discriminator->select($value, $context);
 
         if ($discriminator !== null) {
             return $discriminator->cast($value, $context);

src/Type/ClassType/DiscriminatorTypeSelector.php

@@ -13,6 +13,10 @@
 
 final class DiscriminatorTypeSelector
 {
+    public function __construct(
+        private readonly ClassMetadata $meta,
+    ) {}
+
     /**
      * @param array<array-key, mixed> $value
      *
@@ -21,9 +25,9 @@ final class DiscriminatorTypeSelector
      * @throws RuntimeException in case of mapped type casting error occurs
      * @throws \Throwable in case of internal error occurs
      */
-    public function select(ClassMetadata $meta, mixed $value, Context $context): ?TypeInterface
+    public function select(mixed $value, Context $context): ?TypeInterface
     {
-        $map = $meta->discriminator;
+        $map = $this->meta->discriminator;
 
         if ($map === null) {
             return null;