default services conflit ?

old.vendor/symfony/serializer/Mapping/ClassDiscriminatorMapping.php

@@ -0,0 +1,68 @@
+<?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;
+
+/**
+ * @author Samuel Roze <samuel.roze@gmail.com>
+ */
+class ClassDiscriminatorMapping
+{
+    private $typeProperty;
+    private $typesMapping;
+
+    public function __construct(string $typeProperty, array $typesMapping = [])
+    {
+        $this->typeProperty = $typeProperty;
+        $this->typesMapping = $typesMapping;
+
+        uasort($this->typesMapping, static function (string $a, string $b): int {
+            if (is_a($a, $b, true)) {
+                return -1;
+            }
+
+            if (is_a($b, $a, true)) {
+                return 1;
+            }
+
+            return 0;
+        });
+    }
+
+    public function getTypeProperty(): string
+    {
+        return $this->typeProperty;
+    }
+
+    public function getClassForType(string $type): ?string
+    {
+        return $this->typesMapping[$type] ?? null;
+    }
+
+    /**
+     * @param object|string $object
+     */
+    public function getMappedObjectType($object): ?string
+    {
+        foreach ($this->typesMapping as $type => $typeClass) {
+            if (is_a($object, $typeClass)) {
+                return $type;
+            }
+        }
+
+        return null;
+    }
+
+    public function getTypesMapping(): array
+    {
+        return $this->typesMapping;
+    }
+}