From a71ff9f72b2df20f11578528153db0228b3d037b Mon Sep 17 00:00:00 2001
From: mariofusco <mario.fusco@gmail.com>
Date: Thu, 24 Oct 2024 18:16:50 +0200
Subject: [PATCH] Generating Jackson serializers for concrete classes only

---
 .../processor/JacksonCodeGenerator.java       | 29 +++++++++++--------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/extensions/resteasy-reactive/rest-jackson/deployment/src/main/java/io/quarkus/resteasy/reactive/jackson/deployment/processor/JacksonCodeGenerator.java b/extensions/resteasy-reactive/rest-jackson/deployment/src/main/java/io/quarkus/resteasy/reactive/jackson/deployment/processor/JacksonCodeGenerator.java
index d282f8db034f00..8e96e45fa3f13b 100644
--- a/extensions/resteasy-reactive/rest-jackson/deployment/src/main/java/io/quarkus/resteasy/reactive/jackson/deployment/processor/JacksonCodeGenerator.java
+++ b/extensions/resteasy-reactive/rest-jackson/deployment/src/main/java/io/quarkus/resteasy/reactive/jackson/deployment/processor/JacksonCodeGenerator.java
@@ -70,7 +70,7 @@ public Collection<String> create(Collection<ClassInfo> classInfos) {
 
     private Optional<String> create(ClassInfo classInfo) {
         String beanClassName = classInfo.name().toString();
-        if (vetoedClassName(beanClassName) || !generatedClassNames.add(beanClassName)) {
+        if (vetoedClass(classInfo, beanClassName) || !generatedClassNames.add(beanClassName)) {
             return Optional.empty();
         }
 
@@ -112,9 +112,9 @@ protected void classFields(ClassInfo classInfo, Collection<FieldInfo> fields) {
 
     protected <T> T onSuperClass(ClassInfo classInfo, Function<ClassInfo, T> f) {
         Type superType = classInfo.superClassType();
-        if (superType != null && !vetoedClassName(superType.name().toString())) {
+        if (superType != null) {
             ClassInfo superClassInfo = jandexIndex.getClassByName(superType.name());
-            if (superClassInfo != null) {
+            if (superClassInfo != null && !vetoedClass(superClassInfo, superType.name().toString())) {
                 return f.apply(superClassInfo);
             }
         }
@@ -145,8 +145,9 @@ protected static String ucFirst(String name) {
         return name.substring(0, 1).toUpperCase() + name.substring(1);
     }
 
-    protected static boolean vetoedClassName(String className) {
-        return className.startsWith("java.") || className.startsWith("jakarta.") || className.startsWith("io.vertx.core.json.");
+    protected static boolean vetoedClass(ClassInfo classInfo, String className) {
+        return classInfo.isAbstract() || classInfo.isInterface() || className.startsWith("java.")
+                || className.startsWith("jakarta.") || className.startsWith("io.vertx.core.json.");
     }
 
     protected enum FieldKind {
@@ -203,11 +204,9 @@ private void registerTypeToBeGenerated(Type type) {
     }
 
     private void registerTypeToBeGenerated(String typeName) {
-        if (!vetoedClassName(typeName)) {
-            ClassInfo classInfo = jandexIndex.getClassByName(typeName);
-            if (classInfo != null && shouldGenerateCodeFor(classInfo)) {
-                toBeGenerated.add(classInfo);
-            }
+        ClassInfo classInfo = jandexIndex.getClassByName(typeName);
+        if (classInfo != null && !vetoedClass(classInfo, typeName) && shouldGenerateCodeFor(classInfo)) {
+            toBeGenerated.add(classInfo);
         }
     }
 
@@ -312,8 +311,14 @@ private String fieldNameFromMethod(MethodInfo methodInfo) {
         }
 
         boolean hasUnknownAnnotation() {
-            return annotations.keySet().stream()
-                    .anyMatch(ann -> ann.startsWith("com.fasterxml.jackson.") && !ann.equals(JsonProperty.class.getName()));
+            return annotations.keySet().stream().anyMatch(FieldSpecs::isUnknownAnnotation);
+        }
+
+        private static boolean isUnknownAnnotation(String ann) {
+            if (ann.startsWith("com.fasterxml.jackson.")) {
+                return !ann.equals(JsonProperty.class.getName());
+            }
+            return false;
         }
 
         ResultHandle toValueWriterHandle(BytecodeCreator bytecode, ResultHandle valueHandle) {