Add EndpointObjectMapper supported types method

Closes gh-45876

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/jackson/EndpointObjectMapper.java

@@ -16,13 +16,15 @@
 
 package org.springframework.boot.actuate.endpoint.jackson;
 
+import java.util.Set;
+
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import org.springframework.boot.actuate.endpoint.OperationResponseBody;
 
 /**
  * Interface used to supply the {@link ObjectMapper} that should be used when serializing
- * {@link OperationResponseBody} endpoint results.
+ * endpoint results.
  *
  * @author Phillip Webb
  * @since 3.0.0
@@ -30,6 +32,11 @@ import org.springframework.boot.actuate.endpoint.OperationResponseBody;
  */
 public interface EndpointObjectMapper {
 
+	/**
+	 * The default supported types.
+	 */
+	Set<Class<?>> DEFAULT_SUPPORTED_TYPES = Set.of(OperationResponseBody.class);
+
 	/**
 	 * Return the {@link ObjectMapper} that should be used to serialize
 	 * {@link OperationResponseBody} endpoint results.
@@ -37,4 +44,13 @@ public interface EndpointObjectMapper {
 	 */
 	ObjectMapper get();
 
+	/**
+	 * Return the types that this endpoint mapper supports.
+	 * @return the supported types
+	 * @since 4.0.0
+	 */
+	default Set<Class<?>> getSupportedTypes() {
+		return DEFAULT_SUPPORTED_TYPES;
+	}
+
 }

spring-boot-project/spring-boot-jersey/src/main/java/org/springframework/boot/jersey/autoconfigure/actuate/web/JerseyWebEndpointManagementContextConfiguration.java

@@ -229,7 +229,12 @@ class JerseyWebEndpointManagementContextConfiguration {
 
 		@Override
 		public ObjectMapper getContext(Class<?> type) {
-			return OperationResponseBody.class.isAssignableFrom(type) ? this.endpointObjectMapper.get() : null;
+			for (Class<?> supportedType : this.endpointObjectMapper.getSupportedTypes()) {
+				if (supportedType.isAssignableFrom(type)) {
+					return this.endpointObjectMapper.get();
+				}
+			}
+			return null;
 		}
 
 	}

spring-boot-project/spring-boot-webflux/src/main/java/org/springframework/boot/webflux/autoconfigure/actuate/web/WebFluxEndpointManagementContextConfiguration.java

@@ -21,6 +21,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 import java.util.function.Supplier;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -66,6 +67,7 @@ import org.springframework.http.codec.EncoderHttpMessageWriter;
 import org.springframework.http.codec.HttpMessageWriter;
 import org.springframework.http.codec.ServerCodecConfigurer;
 import org.springframework.http.server.reactive.HttpHandler;
+import org.springframework.util.MimeType;
 import org.springframework.util.StringUtils;
 import org.springframework.util.function.SingletonSupplier;
 import org.springframework.web.reactive.DispatcherHandler;
@@ -183,13 +185,18 @@ public class WebFluxEndpointManagementContextConfiguration {
 		@SuppressWarnings({ "removal", "deprecation" })
 		private void process(Encoder<?> encoder) {
 			if (encoder instanceof org.springframework.http.codec.json.Jackson2JsonEncoder jackson2JsonEncoder) {
-				jackson2JsonEncoder.registerObjectMappersForType(OperationResponseBody.class, (associations) -> {
-					ObjectMapper objectMapper = this.endpointObjectMapper.get().get();
-					MEDIA_TYPES.forEach((mimeType) -> associations.put(mimeType, objectMapper));
-				});
+				this.endpointObjectMapper.get()
+					.getSupportedTypes()
+					.forEach((type) -> jackson2JsonEncoder.registerObjectMappersForType(type,
+							this::registerForAllMimeTypes));
 			}
 		}
 
+		private void registerForAllMimeTypes(Map<MimeType, ObjectMapper> registrar) {
+			ObjectMapper objectMapper = this.endpointObjectMapper.get().get();
+			MEDIA_TYPES.forEach((mimeType) -> registrar.put(mimeType, objectMapper));
+		}
+
 	}
 
 }

spring-boot-project/spring-boot-webmvc/src/main/java/org/springframework/boot/webmvc/autoconfigure/actuate/web/WebMvcEndpointManagementContextConfiguration.java

@@ -21,6 +21,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 
@@ -185,10 +186,13 @@ public class WebMvcEndpointManagementContextConfiguration {
 
 		@SuppressWarnings("removal")
 		private void configure(org.springframework.http.converter.json.MappingJackson2HttpMessageConverter converter) {
-			converter.registerObjectMappersForType(OperationResponseBody.class, (associations) -> {
-				ObjectMapper objectMapper = this.endpointObjectMapper.get();
-				MEDIA_TYPES.forEach((mimeType) -> associations.put(mimeType, objectMapper));
-			});
+			this.endpointObjectMapper.getSupportedTypes()
+				.forEach((type) -> converter.registerObjectMappersForType(type, this::registerForAllMimeTypes));
+		}
+
+		private void registerForAllMimeTypes(Map<MediaType, ObjectMapper> registrar) {
+			ObjectMapper objectMapper = this.endpointObjectMapper.get();
+			MEDIA_TYPES.forEach((mimeType) -> registrar.put(mimeType, objectMapper));
 		}
 
 	}