generate jackson serializers

fix object mapper generation for all primitive types

implement nested types in generated object mapper

implement SecureField annotation support

avoid generating mapper for pojo with unknown jackson annotations

implement collections serialization

fix all tests in rest-jackson module

wip

wip

refactor and simplification

performance tuning

make reflection-free serializers generation opt-in

add @produces annotation to SimpleJsonResource rest endpoints where appropriate

extensions/resteasy-reactive/rest-jackson/deployment/src/main/java/io/quarkus/resteasy/reactive/jackson/deployment/processor/JacksonOptimizationConfig.java

@@ -0,0 +1,30 @@
+package io.quarkus.resteasy.reactive.jackson.deployment.processor;
+
+import java.util.function.BooleanSupplier;
+
+import io.quarkus.runtime.annotations.ConfigPhase;
+import io.quarkus.runtime.annotations.ConfigRoot;
+import io.smallrye.config.ConfigMapping;
+import io.smallrye.config.WithDefault;
+
+/**
+ * Jackson optimization configuration.
+ */
+@ConfigMapping(prefix = "quarkus.jackson.optimization")
+@ConfigRoot(phase = ConfigPhase.BUILD_TIME)
+public interface JacksonOptimizationConfig {
+
+    /**
+     * Enable build time generation of reflection-free Jackson serializers.
+     */
+    @WithDefault("false")
+    boolean enableReflectionFreeSerializers();
+
+    class IsReflectionFreeSerializersEnabled implements BooleanSupplier {
+        JacksonOptimizationConfig config;
+
+        public boolean getAsBoolean() {
+            return config.enableReflectionFreeSerializers();
+        }
+    }
+}

extensions/resteasy-reactive/rest-jackson/deployment/src/main/java/io/quarkus/resteasy/reactive/jackson/deployment/processor/ResteasyReactiveJacksonProcessor.java

@@ -21,6 +21,7 @@
 
 import jakarta.inject.Singleton;
 import jakarta.ws.rs.Priorities;
+import jakarta.ws.rs.Produces;
 import jakarta.ws.rs.RuntimeType;
 import jakarta.ws.rs.core.Cookie;
 import jakarta.ws.rs.core.MediaType;
@@ -57,6 +58,7 @@
 import io.quarkus.deployment.annotations.Record;
 import io.quarkus.deployment.builditem.CombinedIndexBuildItem;
 import io.quarkus.deployment.builditem.FeatureBuildItem;
+import io.quarkus.deployment.builditem.GeneratedClassBuildItem;
 import io.quarkus.deployment.builditem.RuntimeConfigSetupCompleteBuildItem;
 import io.quarkus.deployment.builditem.ShutdownContextBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
@@ -370,6 +372,35 @@ public void initializeRolesAllowedConfigExp(ResteasyReactiveServerJacksonRecorde
         }
     }
 
+    @BuildStep(onlyIf = JacksonOptimizationConfig.IsReflectionFreeSerializersEnabled.class)
+    @Record(ExecutionTime.STATIC_INIT)
+    public void handleEndpointParams(ResteasyReactiveResourceMethodEntriesBuildItem resourceMethodEntries,
+            JaxRsResourceIndexBuildItem jaxRsIndex, CombinedIndexBuildItem index,
+            ResteasyReactiveServerJacksonRecorder recorder,
+            BuildProducer<GeneratedClassBuildItem> generatedClassBuildItemBuildProducer) {
+
+        IndexView indexView = jaxRsIndex.getIndexView();
+
+        Map<String, ClassInfo> jsonClasses = new HashMap<>();
+        for (ResteasyReactiveResourceMethodEntriesBuildItem.Entry entry : resourceMethodEntries.getEntries()) {
+            MethodInfo methodInfo = entry.getMethodInfo();
+            AnnotationInstance producesAnn = methodInfo.annotation(Produces.class);
+            if (producesAnn != null && producesAnn.value().toString().contains("json")) {
+                ClassInfo effectiveReturnClassInfo = getEffectiveReturnClassInfo(methodInfo, indexView);
+                if (effectiveReturnClassInfo != null) {
+                    jsonClasses.put(effectiveReturnClassInfo.name().toString(), effectiveReturnClassInfo);
+                }
+            }
+        }
+
+        if (!jsonClasses.isEmpty()) {
+            JacksonSerializerFactory factory = new JacksonSerializerFactory(generatedClassBuildItemBuildProducer,
+                    index.getComputingIndex());
+            factory.create(jsonClasses.values())
+                    .forEach(recorder::recordGeneratedSerializer);
+        }
+    }
+
     @BuildStep
     public void handleFieldSecurity(ResteasyReactiveResourceMethodEntriesBuildItem resourceMethodEntries,
             JaxRsResourceIndexBuildItem index,
@@ -407,32 +438,7 @@ public void handleFieldSecurity(ResteasyReactiveResourceMethodEntriesBuildItem r
                 continue;
             }
 
-            Type returnType = methodInfo.returnType();
-            if (returnType.kind() == Type.Kind.VOID) {
-                continue;
-            }
-            Type effectiveReturnType = returnType;
-            if (effectiveReturnType.name().equals(ResteasyReactiveDotNames.REST_RESPONSE) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.UNI) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.COMPLETABLE_FUTURE) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.COMPLETION_STAGE) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.REST_MULTI) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.MULTI)) {
-                if (effectiveReturnType.kind() != Type.Kind.PARAMETERIZED_TYPE) {
-                    continue;
-                }
-
-                effectiveReturnType = returnType.asParameterizedType().arguments().get(0);
-            }
-            if (effectiveReturnType.name().equals(ResteasyReactiveDotNames.SET) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.COLLECTION) ||
-                    effectiveReturnType.name().equals(ResteasyReactiveDotNames.LIST)) {
-                effectiveReturnType = effectiveReturnType.asParameterizedType().arguments().get(0);
-            } else if (effectiveReturnType.name().equals(ResteasyReactiveDotNames.MAP)) {
-                effectiveReturnType = effectiveReturnType.asParameterizedType().arguments().get(1);
-            }
-
-            ClassInfo effectiveReturnClassInfo = indexView.getClassByName(effectiveReturnType.name());
+            ClassInfo effectiveReturnClassInfo = getEffectiveReturnClassInfo(methodInfo, indexView);
             if (effectiveReturnClassInfo == null) {
                 continue;
             }
@@ -461,6 +467,39 @@ public void handleFieldSecurity(ResteasyReactiveResourceMethodEntriesBuildItem r
         }
     }
 
+    private static ClassInfo getEffectiveReturnClassInfo(MethodInfo methodInfo, IndexView indexView) {
+        Type returnType = methodInfo.returnType();
+        if (returnType.kind() == Type.Kind.VOID) {
+            return null;
+        }
+        Type effectiveReturnType = getEffectiveReturnType(returnType);
+        return effectiveReturnType == null ? null : indexView.getClassByName(effectiveReturnType.name());
+    }
+
+    private static Type getEffectiveReturnType(Type returnType) {
+        Type effectiveReturnType = returnType;
+        if (effectiveReturnType.name().equals(ResteasyReactiveDotNames.REST_RESPONSE) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.UNI) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.COMPLETABLE_FUTURE) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.COMPLETION_STAGE) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.REST_MULTI) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.MULTI)) {
+            if (effectiveReturnType.kind() != Type.Kind.PARAMETERIZED_TYPE) {
+                return null;
+            }
+
+            effectiveReturnType = returnType.asParameterizedType().arguments().get(0);
+        }
+        if (effectiveReturnType.name().equals(ResteasyReactiveDotNames.SET) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.COLLECTION) ||
+                effectiveReturnType.name().equals(ResteasyReactiveDotNames.LIST)) {
+            effectiveReturnType = effectiveReturnType.asParameterizedType().arguments().get(0);
+        } else if (effectiveReturnType.name().equals(ResteasyReactiveDotNames.MAP)) {
+            effectiveReturnType = effectiveReturnType.asParameterizedType().arguments().get(1);
+        }
+        return effectiveReturnType;
+    }
+
     private static Map<String, Boolean> getTypesWithSecureField() {
         // if any of following types is detected as an endpoint return type or a field of endpoint return type,
         // we always need to apply security serialization as any type can be represented with them

extensions/resteasy-reactive/rest-jackson/deployment/src/test/java/io/quarkus/resteasy/reactive/jackson/deployment/test/Cat.java

@@ -4,9 +4,9 @@
 
 public class Cat extends AbstractNamedPet {
 
-    @SecureField(rolesAllowed = "admin")
     private int privateAge;
 
+    @SecureField(rolesAllowed = "admin")
     public int getPrivateAge() {
         return privateAge;
     }