Extensions in subobjects of OpenAPI no longer work. Fixes #2449.

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/service/GenericResponseService.java

@@ -712,7 +712,7 @@ private Map<String, ApiResponse> getGenericMapResponse(Class<?> beanType) {
 
 			LinkedHashMap<String, ApiResponse> genericApiResponsesClone;
 			try {
-				ObjectMapper objectMapper = ObjectMapperProvider.createJson(springDocConfigProperties);
+				ObjectMapper objectMapper = new ObjectMapper();
 				genericApiResponsesClone = objectMapper.readValue(objectMapper.writeValueAsString(genericApiResponseMap), ApiResponses.class);
 				return genericApiResponsesClone;
 			}

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/service/OpenAPIService.java

@@ -244,14 +244,12 @@ public OpenAPI build(Locale locale) {
 		}
 		else {
 			try {
-				ObjectMapper objectMapper = ObjectMapperProvider.createJson(springDocConfigProperties);
+				ObjectMapper objectMapper = new ObjectMapper();
 				calculatedOpenAPI = objectMapper.readValue(objectMapper.writeValueAsString(openAPI), OpenAPI.class);
-				objectMapper.setSerializationInclusion(Include.ALWAYS);
-				Map extensionsClone = objectMapper.readValue(objectMapper.writeValueAsString(openAPI.getExtensions()), Map.class);
-				calculatedOpenAPI.extensions(extensionsClone);
 			}
 			catch (JsonProcessingException e) {
 				LOGGER.warn("Json Processing Exception occurred: {}", e.getMessage());
+				calculatedOpenAPI = openAPI;
 			}
 		}
 

springdoc-openapi-starter-webmvc-api/src/test/java/test/org/springdoc/api/v30/app173/SpringDocApp173Test.java

@@ -28,6 +28,7 @@
 import java.util.Map;
 
 import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Info;
 import org.junit.jupiter.api.Test;
 import org.springdoc.core.utils.Constants;
 import test.org.springdoc.api.v30.AbstractSpringDocV30Test;
@@ -68,7 +69,9 @@ private void testApp(Locale locale) throws Exception {
 	static class SpringDocTestApp {
 		@Bean
 		public OpenAPI openAPI() {
-			return new OpenAPI().extensions(Map.of("TEST", "HELLO"));
+			return new OpenAPI()
+					.info(new Info().extensions(Map.of("TEST", "HELLO")))
+					.extensions(Map.of("TEST", "HELLO"));
 		}
 	}
 

springdoc-openapi-starter-webmvc-api/src/test/resources/results/3.0.1/app173.json

@@ -1,8 +1,7 @@
 {
   "openapi": "3.0.1",
   "info": {
-    "title": "OpenAPI definition",
-    "version": "v0"
+    "TEST": "HELLO"
   },
   "servers": [
     {