Enable SerializationFeature. WRITE_ENUMS_USING_TO_STRING by default (#4567)

Author: JooHyukKim

release-notes/VERSION

@@ -60,6 +60,8 @@ Versions: 3.x (for earlier see VERSION-2.x)
 #4552: Change `MapperFeature.ALLOW_FINAL_FIELDS_AS_MUTATORS` default to `false` for 3.0
 #4566: Enable `DeserializationFeature.READ_ENUMS_USING_TO_STRING` by default (3.0)
  (contributed by Joo-Hyuk K)
+#4567: Enable `SerializationFeature.WRITE_ENUMS_USING_TO_STRING` by default (3.0)
+ (contributed by Joo-Hyuk K)
 - Remove `MappingJsonFactory`
 - Add context parameter for `TypeSerializer` contextualization (`forProperty()`)
 - Default for `JsonNodeFeature.STRIP_TRAILING_BIGDECIMAL_ZEROES` changed to `false` for 3.0

src/main/java/tools/jackson/databind/SerializationFeature.java

@@ -276,9 +276,9 @@ public enum SerializationFeature implements ConfigFeature
      * Note: this feature should usually have same value
      * as {@link DeserializationFeature#READ_ENUMS_USING_TO_STRING}.
      *<p>
-     * Feature is disabled by default.
+     * Feature is enabled by default.
      */
-    WRITE_ENUMS_USING_TO_STRING(false),
+    WRITE_ENUMS_USING_TO_STRING(true),
 
     /**
      * Feature that determines whether Java Enum values are serialized

src/main/java/tools/jackson/databind/jdk14/JDK14Util.java

@@ -1,15 +1,8 @@
 package tools.jackson.databind.jdk14;
 
 import java.lang.reflect.Method;
-import java.util.Collections;
 import java.util.List;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonCreator.Mode;
-
-import tools.jackson.databind.AnnotationIntrospector;
-import tools.jackson.databind.BeanDescription;
-import tools.jackson.databind.DeserializationContext;
 import tools.jackson.databind.PropertyName;
 import tools.jackson.databind.cfg.MapperConfig;
 import tools.jackson.databind.introspect.AnnotatedClass;

src/test/java/tools/jackson/databind/deser/creators/EnumCreatorTest.java

@@ -343,7 +343,10 @@ public void testNoArgEnumCreator() throws Exception
     @Test
     public void testEnumCreators1291() throws Exception
     {
-        ObjectMapper mapper = jsonMapperBuilder().disable(DeserializationFeature.READ_ENUMS_USING_TO_STRING).build();
+        ObjectMapper mapper = jsonMapperBuilder()
+                .disable(DeserializationFeature.READ_ENUMS_USING_TO_STRING)
+                .disable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
+                .build();
         String json = mapper.writeValueAsString(Enum1291.V2);
         Enum1291 result = mapper.readValue(json, Enum1291.class);
         assertSame(Enum1291.V2, result);

src/test/java/tools/jackson/databind/deser/enums/EnumMapDeserializationTest.java

@@ -312,7 +312,9 @@ public void testCustomEnumAsRootMapKey() throws Exception
         map.put(MyEnum2457.A, "1");
         map.put(MyEnum2457.B, "2");
         assertEquals(a2q("{'A':'1','B':'2'}"),
-                MAPPER.writeValueAsString(map));
+                MAPPER.writer()
+                        .without(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
+                        .writeValueAsString(map));
 
         // But should be able to override
         assertEquals(a2q("{'"+MyEnum2457.A.toString()+"':'1','"+MyEnum2457.B.toString()+"':'2'}"),
@@ -335,7 +337,9 @@ public void testCustomEnumAsRootMapKeyMixin() throws Exception
         map.put(MyEnum2457Base.A, "1");
         map.put(MyEnum2457Base.B, "2");
         assertEquals(a2q("{'a_mixin':'1','b_mixin':'2'}"),
-                mixinMapper.writeValueAsString(map));
+                mixinMapper.writer()
+                        .without(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
+                        .writeValueAsString(map));
 
         // But should be able to override
         assertEquals(a2q("{'"+MyEnum2457Base.A.toString()+"':'1','"+MyEnum2457Base.B.toString()+"':'2'}"),

src/test/java/tools/jackson/databind/deser/enums/EnumWithNullToString4355Test.java

@@ -27,7 +27,8 @@ public String toString() {
         }
     }
 
-    private final ObjectMapper MAPPER = newJsonMapper();
+    private final ObjectMapper MAPPER = jsonMapperBuilder()
+            .disable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING).build();
 
     // [databind#4355]
     @Test

src/test/java/tools/jackson/databind/jsontype/deftyping/TestDefaultForObject.java

@@ -107,7 +107,9 @@ public Validity validateBaseType(DatabindContext ctxt, JavaType baseType) {
      */
 
     private final ObjectMapper MAPPER = jsonMapperBuilder()
-            .disable(DeserializationFeature.READ_ENUMS_USING_TO_STRING).build();
+            .disable(DeserializationFeature.READ_ENUMS_USING_TO_STRING)
+            .disable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
+            .build();
 
     /**
      * Unit test that verifies that a bean is stored with type information,
@@ -250,6 +252,7 @@ public void testEnumAsObject() throws Exception
         // and then with it
         ObjectMapper m = jsonMapperBuilder()
                 .disable(DeserializationFeature.READ_ENUMS_USING_TO_STRING)
+                .disable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
                 .activateDefaultTyping(NoCheckSubTypeValidator.instance)
                 .build();
         String json = m.writeValueAsString(input);

src/test/java/tools/jackson/databind/ser/EnumAsMapKeyTest.java

@@ -96,7 +96,8 @@ public TypeContainer(Type type, int value) {
     /**********************************************************************
      */
 
-    private final ObjectMapper MAPPER = newJsonMapper();
+    private final ObjectMapper MAPPER = jsonMapperBuilder()
+            .disable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING).build();
 
     @Test
     public void testMapWithEnumKeys() throws Exception

src/test/java/tools/jackson/databind/ser/enums/EnumSerializationMixinTest.java

@@ -58,6 +58,7 @@ public String toString() {
     @Test
     public void testSerialization() throws Exception {
         ObjectMapper mixinMapper = jsonMapperBuilder()
+                .disable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
                 .addMixIn(EnumBaseA.class, EnumMixinA.class).build();
 
         // equal name(), different toString() value

src/test/java/tools/jackson/databind/ser/jdk/EnumNamingSerializationTest.java

@@ -22,7 +22,7 @@ public class EnumNamingSerializationTest extends DatabindTestUtil {
     /**********************************************************
     */
 
-    final ObjectMapper MAPPER = newJsonMapper();
+    final ObjectMapper MAPPER = jsonMapperBuilder().disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS).build();
 
     @EnumNaming(EnumNamingStrategies.CamelCaseStrategy.class)
     static enum EnumFlavorA {
@@ -117,7 +117,9 @@ public void testDesrEnumWithEnumMap() throws Exception {
         EnumMap<EnumSauceB, String> enums = new EnumMap<EnumSauceB, String>(EnumSauceB.class);
         enums.put(EnumSauceB.MAYO_NEZZ, "value");
 
-        String str = MAPPER.writeValueAsString(enums);
+        String str = MAPPER.writer()
+                .without(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
+                .writeValueAsString(enums);
 
         assertEquals(a2q("{'mayoNezz':'value'}"), str);
     }