Fix #4908 (#4924)

Author: cowtowncoder

release-notes/CREDITS-2.x

@@ -1868,3 +1868,8 @@ Tomáš Poledný (@Saljack)
  * Reported #4860: `ConstructorDetector.USE_PROPERTIES_BASED` does not work with
    multiple constructors since 2.18
   (2.18.3)
+
+Gustavo Bazan (@gssbzn)
+ * Reported #4908: Deserialization behavior change with @JsonCreator and
+   @ConstructorProperties between 2.17 and 2.18
+  (2.18.3)

release-notes/VERSION-2.x

@@ -18,6 +18,9 @@ Project: jackson-databind
   multiple constructors since 2.18
  (reported by Tomáš P)
  (fix by Joo-Hyuk K, @cowtowncoder)
+#4908: Deserialization behavior change with @JsonCreator and
+  @ConstructorProperties between 2.17 and 2.18
+ (reported by Gustavo B)
 
 2.18.2 (27-Nov-2024)
 

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

@@ -1486,8 +1486,16 @@ public JsonCreator.Mode findCreatorBinding(Annotated a) {
     @Override
     public JsonCreator.Mode findCreatorAnnotation(MapperConfig<?> config, Annotated a) {
         JsonCreator ann = _findAnnotation(a, JsonCreator.class);
-        if (ann != null) {
-            return ann.mode();
+        JsonCreator.Mode mode;
+        if (ann == null) {
+            mode = null;
+        } else {
+            mode = ann.mode();
+            // 25-Jan-2025, tatu: [databind#4809] Need to avoid "DEFAULT" from masking
+            //   @CreatorProperties-provided value
+            if (mode != JsonCreator.Mode.DEFAULT) {
+                return mode;
+            }
         }
         if (_cfgConstructorPropertiesImpliesCreator
                 && config.isEnabled(MapperFeature.INFER_CREATOR_FROM_CONSTRUCTOR_PROPERTIES)
@@ -1503,7 +1511,7 @@ public JsonCreator.Mode findCreatorAnnotation(MapperConfig<?> config, Annotated
                 }
             }
         }
-        return null;
+        return mode;
     }
 
     /*

src/test/java/com/fasterxml/jackson/databind/deser/creators/CreatorPropertiesTest.java

@@ -147,4 +147,27 @@ public void testSkipNonScalar3252() throws Exception
 //System.err.println("JsON: "+MAPPER.writerWithDefaultPrettyPrinter().writeValueAsString(testData));
         assertEquals(3, testData.size());
     }
+
+    static class Something4908 {
+        @JsonProperty("value")
+        private final String _value;
+
+        String getValue() {
+            return _value;
+        }
+
+        @JsonCreator
+        @ConstructorProperties({"value"})
+        Something4908(String pValue) {
+            _value = pValue;
+        }
+    }
+
+    // [databind#4908] @ConstructorProperties and @JsonCreator
+    @Test
+    public void testConstructorPropertyAndJsonCreator() throws Exception {
+        Something4908 value = MAPPER.readValue(a2q("{'value':'abc'}"),
+                Something4908.class);
+        assertEquals("abc", value.getValue());
+    }
 }