From c9b80463b4a468f0ef9e943eca8da2dcc43f52dd Mon Sep 17 00:00:00 2001
From: Stephan Strate <s.strate@prosoz.de>
Date: Wed, 4 Dec 2024 15:37:08 +0100
Subject: [PATCH] Register Kotlin's empty set for reflection

---
 .../java/io/quarkus/kotlin/deployment/KotlinProcessor.java  | 4 +++-
 .../main/kotlin/io/quarkus/it/kotser/GreetingResource.kt    | 6 ++++++
 .../src/test/kotlin/io/quarkus/it/kotser/ResourceTest.kt    | 5 +++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/extensions/kotlin/deployment/src/main/java/io/quarkus/kotlin/deployment/KotlinProcessor.java b/extensions/kotlin/deployment/src/main/java/io/quarkus/kotlin/deployment/KotlinProcessor.java
index aff88dfbd80b2..8a95b61750fe2 100644
--- a/extensions/kotlin/deployment/src/main/java/io/quarkus/kotlin/deployment/KotlinProcessor.java
+++ b/extensions/kotlin/deployment/src/main/java/io/quarkus/kotlin/deployment/KotlinProcessor.java
@@ -62,7 +62,9 @@ void registerKotlinReflection(final BuildProducer<ReflectiveClassBuildItem> refl
         reflectiveClass.produce(ReflectiveClassBuildItem.builder("kotlin.KotlinVersion$Companion[]").constructors(false)
                 .build());
         reflectiveClass.produce(
-                ReflectiveClassBuildItem.builder("kotlin.collections.EmptyList", "kotlin.collections.EmptyMap").build());
+                ReflectiveClassBuildItem
+                        .builder("kotlin.collections.EmptyList", "kotlin.collections.EmptyMap", "kotlin.collections.EmptySet")
+                        .build());
 
         nativeResourcePatterns.produce(builder().includePatterns(
                 "META-INF/.*.kotlin_module$",
diff --git a/integration-tests/kotlin/src/main/kotlin/io/quarkus/it/kotser/GreetingResource.kt b/integration-tests/kotlin/src/main/kotlin/io/quarkus/it/kotser/GreetingResource.kt
index a1d0804d563c0..bbf30af7b3626 100644
--- a/integration-tests/kotlin/src/main/kotlin/io/quarkus/it/kotser/GreetingResource.kt
+++ b/integration-tests/kotlin/src/main/kotlin/io/quarkus/it/kotser/GreetingResource.kt
@@ -85,5 +85,11 @@ class GreetingResource {
         return emptyMap<String, String>()
     }
 
+    @GET
+    @Path("emptySet")
+    fun emptySet(): Set<String> {
+        return emptySet<String>()
+    }
+
     fun reflect() = "hello, world"
 }
diff --git a/integration-tests/kotlin/src/test/kotlin/io/quarkus/it/kotser/ResourceTest.kt b/integration-tests/kotlin/src/test/kotlin/io/quarkus/it/kotser/ResourceTest.kt
index 35d43c86e164f..4f50cae5545b5 100644
--- a/integration-tests/kotlin/src/test/kotlin/io/quarkus/it/kotser/ResourceTest.kt
+++ b/integration-tests/kotlin/src/test/kotlin/io/quarkus/it/kotser/ResourceTest.kt
@@ -134,4 +134,9 @@ open class ResourceTest {
     fun testEmptyMap() {
         When { get("/emptyList") } Then { statusCode(200) }
     }
+
+    @Test
+    fun testEmptySet() {
+        When { get("/emptySet") } Then { statusCode(200) }
+    }
 }