From 11fde24278e15807e1f7c9d65484b92d0a51711a Mon Sep 17 00:00:00 2001
From: Georgios Andrianakis <geoand@gmail.com>
Date: Thu, 8 Apr 2021 15:20:15 +0300
Subject: [PATCH] Ignore abstract classes in Filter hierarchy

Fixes: #16359
(cherry picked from commit ee723bc3228f0ef2873f15360d8ce2eed38245b4)
---
 .../scanning/ResteasyReactiveInterceptorScanner.java          | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/independent-projects/resteasy-reactive/common/processor/src/main/java/org/jboss/resteasy/reactive/common/processor/scanning/ResteasyReactiveInterceptorScanner.java b/independent-projects/resteasy-reactive/common/processor/src/main/java/org/jboss/resteasy/reactive/common/processor/scanning/ResteasyReactiveInterceptorScanner.java
index 2e63e5576af73..c9af2ce7968ac 100644
--- a/independent-projects/resteasy-reactive/common/processor/src/main/java/org/jboss/resteasy/reactive/common/processor/scanning/ResteasyReactiveInterceptorScanner.java
+++ b/independent-projects/resteasy-reactive/common/processor/src/main/java/org/jboss/resteasy/reactive/common/processor/scanning/ResteasyReactiveInterceptorScanner.java
@@ -1,5 +1,6 @@
 package org.jboss.resteasy.reactive.common.processor.scanning;
 
+import java.lang.reflect.Modifier;
 import java.util.Collection;
 import java.util.HashSet;
 import java.util.Set;
@@ -84,6 +85,9 @@ public static void scanForIOInterceptors(ResourceInterceptors interceptors, Inde
     private static <T> void handleDiscoveredInterceptor(
             ApplicationScanningResult applicationResultBuildItem, InterceptorContainer<T> interceptorContainer, IndexView index,
             ClassInfo filterClass) {
+        if (Modifier.isAbstract(filterClass.flags())) {
+            return;
+        }
         ApplicationScanningResult.KeepProviderResult keepProviderResult = applicationResultBuildItem.keepProvider(filterClass);
         if (keepProviderResult != ApplicationScanningResult.KeepProviderResult.DISCARD) {
             ResourceInterceptor<T> interceptor = interceptorContainer.create();