Fix #4452 by introspecting Creators for Record serialization too

release-notes/VERSION-2.x

@@ -6,6 +6,9 @@ Project: jackson-databind
 
 2.18.0 (not yet released)
 
+#4452: `@JsonProperty` not serializing field names properly
+  on `@JsonCreator` in Record
+ (reported by @Incara)
 #4453: Allow JSON Integer to deserialize into a single-arg constructor of
   parameter type `double`
  (contributed by David M)

src/main/java/com/fasterxml/jackson/databind/introspect/POJOPropertiesCollector.java

@@ -430,7 +430,9 @@ protected void collectAll()
         // 25-Jan-2016, tatu: Avoid introspecting (constructor-)creators for non-static
         //    inner classes, see [databind#1502]
         // 13-May-2023, PJ: Need to avoid adding creators for Records when serializing [databind#3925]
-        if (!_classDef.isNonStaticInnerClass() && !(_forSerialization && isRecord)) {
+        // 18-May-2024, tatu: Serialization side does, however, require access to renaming
+        //    etc (see f.ex [databind#4452]) so let's not skip
+        if (!_classDef.isNonStaticInnerClass()) { // && !(_forSerialization && isRecord)) {
             _addCreators(props);
         }
 

src/test-jdk17/java/com/fasterxml/jackson/databind/failing/RecordCreatorSerialization4452Test.java → src/test-jdk17/java/com/fasterxml/jackson/databind/records/RecordCreatorSerialization4452Test.java

@@ -1,14 +1,15 @@
-package com.fasterxml.jackson.databind.failing;
+package com.fasterxml.jackson.databind.records;
+
+import java.util.*;
+
+import org.junit.jupiter.api.Test;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.json.JsonMapper;
-import com.fasterxml.jackson.databind.records.Jdk8ConstructorParameterNameAnnotationIntrospector;
-import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 // [databind#4452] : JsonProperty not serializing field names properly on JsonCreator in record #4452
 class RecordCreatorSerialization4452Test {
@@ -37,32 +38,22 @@ public CreatorTestObject(
                     .annotationIntrospector(new Jdk8ConstructorParameterNameAnnotationIntrospector())
                     .build();
 
-    // supposed to pass, and yes it does
     @Test
-    public void testPlain()
-            throws Exception
+    public void testPlain() throws Exception
     {
         String result = OBJECT_MAPPER.writeValueAsString(new PlainTestObject("test", 1));
         assertEquals("{\"strField\":\"test\",\"intField\":1}", result);
     }
 
-    // Should pass but doesn't
-    // It did pass in 2.15 or earlier versions, but it fails in 2.16 or later
     @Test
-    public void testWithCreator()
-            throws Exception
+    public void testWithCreator() throws Exception
     {
-        String result = OBJECT_MAPPER
+        String json = OBJECT_MAPPER
                 .writeValueAsString(new CreatorTestObject("test", 2, 1));
+        //System.err.println("JSON: "+json);
 
-        /*
-        Serializes to (using System.err.println("JSON: "+result); )
-
-            {"testFieldName":"test","testOtherField":3}
-
-         */
-        assertTrue(result.contains("intField"));
-        assertTrue(result.contains("strField"));
+        @SuppressWarnings("unchecked")
+        Map<String, Object> asMap = (Map<String, Object>) OBJECT_MAPPER.readValue(json, Map.class);
+        assertEquals(new HashSet<>(Arrays.asList("intField", "strField")), asMap.keySet());
     }
-
-}
+}