Polish "Add properties for configuring EnumFeature and JsonNodeFeature"

See gh-37885

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration.java

@@ -213,8 +213,8 @@ public class JacksonAutoConfiguration {
 				configureFeatures(builder, this.jacksonProperties.getMapper());
 				configureFeatures(builder, this.jacksonProperties.getParser());
 				configureFeatures(builder, this.jacksonProperties.getGenerator());
-				configureFeatures(builder, this.jacksonProperties.getEnumDatatype());
-				configureFeatures(builder, this.jacksonProperties.getJsonNodeDatatype());
+				configureFeatures(builder, this.jacksonProperties.getDatatype().getEnum());
+				configureFeatures(builder, this.jacksonProperties.getDatatype().getJsonNode());
 				configureDateFormat(builder);
 				configurePropertyNamingStrategy(builder);
 				configureModules(builder);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonProperties.java

@@ -89,16 +89,6 @@ public class JacksonProperties {
 	 */
 	private final Map<JsonGenerator.Feature, Boolean> generator = new EnumMap<>(JsonGenerator.Feature.class);
 
-	/**
-	 * Jackson on/off features for enum types.
-	 */
-	private final Map<EnumFeature, Boolean> enumDatatype = new EnumMap<>(EnumFeature.class);
-
-	/**
-	 * Jackson on/off features for JsonNode types.
-	 */
-	private final Map<JsonNodeFeature, Boolean> jsonNodeDatatype = new EnumMap<>(JsonNodeFeature.class);
-
 	/**
 	 * Controls the inclusion of properties during serialization. Configured with one of
 	 * the values in Jackson's JsonInclude.Include enumeration.
@@ -127,6 +117,8 @@ public class JacksonProperties {
 	 */
 	private Locale locale;
 
+	private final Datatype datatype = new Datatype();
+
 	public String getDateFormat() {
 		return this.dateFormat;
 	}
@@ -167,14 +159,6 @@ public class JacksonProperties {
 		return this.generator;
 	}
 
-	public Map<EnumFeature, Boolean> getEnumDatatype() {
-		return this.enumDatatype;
-	}
-
-	public Map<JsonNodeFeature, Boolean> getJsonNodeDatatype() {
-		return this.jsonNodeDatatype;
-	}
-
 	public JsonInclude.Include getDefaultPropertyInclusion() {
 		return this.defaultPropertyInclusion;
 	}
@@ -215,6 +199,10 @@ public class JacksonProperties {
 		this.locale = locale;
 	}
 
+	public Datatype getDatatype() {
+		return this.datatype;
+	}
+
 	public enum ConstructorDetectorStrategy {
 
 		/**
@@ -240,4 +228,26 @@ public class JacksonProperties {
 
 	}
 
+	public static class Datatype {
+
+		/**
+		 * Jackson on/off features for enums.
+		 */
+		private final Map<EnumFeature, Boolean> enumFeatures = new EnumMap<>(EnumFeature.class);
+
+		/**
+		 * Jackson on/off features for JsonNodes.
+		 */
+		private final Map<JsonNodeFeature, Boolean> jsonNode = new EnumMap<>(JsonNodeFeature.class);
+
+		public Map<EnumFeature, Boolean> getEnum() {
+			return this.enumFeatures;
+		}
+
+		public Map<JsonNodeFeature, Boolean> getJsonNode() {
+			return this.jsonNode;
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -1559,6 +1559,10 @@
       "name": "spring.jackson.constructor-detector",
       "defaultValue": "default"
     },
+    {
+      "name": "spring.jackson.datatype.enum",
+      "description": "Jackson on/off features for enums."
+    },
     {
       "name": "spring.jackson.joda-date-time-format",
       "type": "java.lang.String",

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jackson/JacksonAutoConfigurationTests.java

@@ -294,7 +294,7 @@ class JacksonAutoConfigurationTests {
 
 	@Test
 	void enableEnumFeature() {
-		this.contextRunner.withPropertyValues("spring.jackson.enum-data-type.write_enums_to_lowercase:true")
+		this.contextRunner.withPropertyValues("spring.jackson.datatype.enum.write-enums-to-lowercase=true")
 			.run((context) -> {
 				ObjectMapper mapper = context.getBean(ObjectMapper.class);
 				assertThat(EnumFeature.WRITE_ENUMS_TO_LOWERCASE.enabledByDefault()).isFalse();
@@ -304,7 +304,7 @@ class JacksonAutoConfigurationTests {
 
 	@Test
 	void disableJsonNodeFeature() {
-		this.contextRunner.withPropertyValues("spring.jackson.json-node-data-type.write_null_properties:false")
+		this.contextRunner.withPropertyValues("spring.jackson.datatype.jsonnode.write-null-properties:false")
 			.run((context) -> {
 				ObjectMapper mapper = context.getBean(ObjectMapper.class);
 				assertThat(JsonNodeFeature.WRITE_NULL_PROPERTIES.enabledByDefault()).isTrue();

spring-boot-project/spring-boot-docs/src/docs/asciidoc/howto/spring-mvc.adoc

@@ -64,11 +64,19 @@ Spring Boot also has some features to make it easier to customize this behavior.
 
 You can configure the `ObjectMapper` and `XmlMapper` instances by using the environment.
 Jackson provides an extensive suite of on/off features that can be used to configure various aspects of its processing.
-These features are described in six enums (in Jackson) that map onto properties in the environment:
+These features are described in several enums (in Jackson) that map onto properties in the environment:
 
 |===
 | Enum | Property | Values
 
+| `com.fasterxml.jackson.databind.cfg.EnumFeature`
+| `spring.jackson.datatype.enum.<feature_name>`
+| `true`, `false`
+
+| `com.fasterxml.jackson.databind.cfg.JsonNodeFeature`
+| `spring.jackson.datatype.jsonnode.<feature_name>`
+| `true`, `false`
+
 | `com.fasterxml.jackson.databind.DeserializationFeature`
 | `spring.jackson.deserialization.<feature_name>`
 | `true`, `false`