Initial Drupal 11 with DDEV setup

vendor/symfony/serializer/Mapping/ClassDiscriminatorFromClassMetadata.php

@@ -0,0 +1,81 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Mapping;
+
+use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface;
+
+/**
+ * @author Samuel Roze <samuel.roze@gmail.com>
+ */
+class ClassDiscriminatorFromClassMetadata implements ClassDiscriminatorResolverInterface
+{
+    private array $mappingForMappedObjectCache = [];
+
+    public function __construct(
+        private readonly ClassMetadataFactoryInterface $classMetadataFactory,
+    ) {
+    }
+
+    public function getMappingForClass(string $class): ?ClassDiscriminatorMapping
+    {
+        if ($this->classMetadataFactory->hasMetadataFor($class)) {
+            return $this->classMetadataFactory->getMetadataFor($class)->getClassDiscriminatorMapping();
+        }
+
+        return null;
+    }
+
+    public function getMappingForMappedObject(object|string $object): ?ClassDiscriminatorMapping
+    {
+        if ($this->classMetadataFactory->hasMetadataFor($object)) {
+            $metadata = $this->classMetadataFactory->getMetadataFor($object);
+
+            if (null !== $metadata->getClassDiscriminatorMapping()) {
+                return $metadata->getClassDiscriminatorMapping();
+            }
+        }
+
+        $cacheKey = \is_object($object) ? $object::class : $object;
+        if (!\array_key_exists($cacheKey, $this->mappingForMappedObjectCache)) {
+            $this->mappingForMappedObjectCache[$cacheKey] = $this->resolveMappingForMappedObject($object);
+        }
+
+        return $this->mappingForMappedObjectCache[$cacheKey];
+    }
+
+    public function getTypeForMappedObject(object|string $object): ?string
+    {
+        if (null === $mapping = $this->getMappingForMappedObject($object)) {
+            return null;
+        }
+
+        return $mapping->getMappedObjectType($object);
+    }
+
+    private function resolveMappingForMappedObject(object|string $object): ?ClassDiscriminatorMapping
+    {
+        $reflectionClass = new \ReflectionClass($object);
+        if ($parentClass = $reflectionClass->getParentClass()) {
+            if (null !== ($parentMapping = $this->getMappingForMappedObject($parentClass->getName()))) {
+                return $parentMapping;
+            }
+        }
+
+        foreach ($reflectionClass->getInterfaceNames() as $interfaceName) {
+            if (null !== ($interfaceMapping = $this->getMappingForMappedObject($interfaceName))) {
+                return $interfaceMapping;
+            }
+        }
+
+        return null;
+    }
+}