Ensure clone method creates deep clone

src/Metadata/Util/CloneTrait.php

@@ -24,14 +24,59 @@ trait CloneTrait
 {
     public function clone(mixed $data): mixed
     {
-        if (!\is_object($data)) {
+        if (is_array($data)) {
+            return $this->cloneArray($data);
+        }
+
+        if (!is_object($data)) {
             return $data;
         }
 
         try {
-            return (new \ReflectionClass($data))->isCloneable() ? clone $data : null;
+            $reflection = new \ReflectionClass($data);
+
+            if (!$reflection->isCloneable()) {
+                return null;
+            }
+
+            $clonedObject = clone $data;
+
+            foreach ($reflection->getProperties() as $property) {
+                if ($property->isInitialized($data)) {
+                    $value = $property->getValue($data);
+
+                    if (is_object($value)) {
+                        $clonedValue = $this->clone($value);
+                        $property->setValue($clonedObject, $clonedValue);
+                    } elseif (is_array($value)) {
+                        $clonedValue = $this->cloneArray($value);
+                        $property->setValue($clonedObject, $clonedValue);
+                    } else {
+                        $property->setValue($clonedObject, $value);
+                    }
+                }
+
+                // If the property is uninitialized, we skip it to avoid errors
+            }
+
+            return $clonedObject;
         } catch (\ReflectionException) {
             return null;
         }
     }
+
+    private function cloneArray(array $array): array
+    {
+        $clonedArray = [];
+        foreach ($array as $key => $value) {
+            if (is_object($value)) {
+                $clonedArray[$key] = $this->clone($value);
+            } elseif (is_array($value)) {
+                $clonedArray[$key] = $this->cloneArray($value);
+            } else {
+                $clonedArray[$key] = $value;
+            }
+        }
+        return $clonedArray;
+    }
 }