From a639b0dc797f557a3bfba1620703f231a75d8c5f Mon Sep 17 00:00:00 2001
From: Georgios Andrianakis <geoand@gmail.com>
Date: Mon, 29 Jul 2024 10:38:16 +0300
Subject: [PATCH] Treat Kotlin's Unit as void for the Quarkus REST scoring
 system

Fixes: #42159
(cherry picked from commit 104de690a1bacfd83f121a08bcd28748ef43a0f1)
---
 .../core/startup/RuntimeResourceDeployment.java      | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/startup/RuntimeResourceDeployment.java b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/startup/RuntimeResourceDeployment.java
index 041796659ddf3..abe1546f86896 100644
--- a/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/startup/RuntimeResourceDeployment.java
+++ b/independent-projects/resteasy-reactive/server/runtime/src/main/java/org/jboss/resteasy/reactive/server/core/startup/RuntimeResourceDeployment.java
@@ -565,8 +565,16 @@ private static void smartInitParameterConverter(int i, ParameterConverter quarku
     }
 
     private static boolean isNotVoid(Class<?> rawEffectiveReturnType) {
-        return rawEffectiveReturnType != Void.class
-                && rawEffectiveReturnType != void.class;
+        if (rawEffectiveReturnType == Void.class) {
+            return false;
+        }
+        if (rawEffectiveReturnType == void.class) {
+            return false;
+        }
+        if ("kotlin.Unit".equals(rawEffectiveReturnType.getName())) {
+            return false;
+        }
+        return true;
     }
 
     private void addResponseHandler(ServerResourceMethod method, List<ServerRestHandler> handlers) {