update tests

modules/openapi-generator/src/main/resources/kotlin-spring/optionalDataType.mustache

@@ -1 +1 @@
-{{^isFile}}{{{dataType}}}{{^required}}{{^defaultValue}}?{{/defaultValue}}{{/required}}{{/isFile}}{{#isFile}}{{#isArray}}Array<{{/isArray}}org.springframework.web.multipart.MultipartFile{{#isArray}}>{{/isArray}}{{#isNullable}}?{{/isNullable}}{{/isFile}}
+{{^isFile}}{{{dataType}}}{{^required}}{{^defaultValue}}?{{/defaultValue}}{{/required}}{{/isFile}}{{#isFile}}{{#isArray}}Array<{{/isArray}}org.springframework.web.multipart.MultipartFile{{#isArray}}>{{/isArray}}{{^required}}?{{/required}}{{#required}}{{#isNullable}}?{{/isNullable}}{{/required}}{{/isFile}}

modules/openapi-generator/src/test/java/org/openapitools/codegen/kotlin/spring/KotlinSpringServerCodegenTest.java

@@ -405,9 +405,9 @@ public class KotlinSpringServerCodegenTest {
         assertFileContains(Paths.get(outputPath + "/src/main/kotlin/org/openapitools/api/NullableMultipartfileArrayApiController.kt"),
                 "files: Array<org.springframework.web.multipart.MultipartFile>?)");
         assertFileContains(Paths.get(outputPath + "/src/main/kotlin/org/openapitools/api/NonNullableMultipartfileApiController.kt"),
-                "file: org.springframework.web.multipart.MultipartFile)");
+                "file: org.springframework.web.multipart.MultipartFile?)");
         assertFileContains(Paths.get(outputPath + "/src/main/kotlin/org/openapitools/api/NonNullableMultipartfileArrayApiController.kt"),
-                "files: Array<org.springframework.web.multipart.MultipartFile>)");
+                "files: Array<org.springframework.web.multipart.MultipartFile>?)");
     }
 
     @Test

samples/server/petstore/kotlin-spring-cloud/src/main/kotlin/org/openapitools/api/PetApi.kt

@@ -110,7 +110,7 @@ interface PetApi {
             produces = ["application/json"],
             consumes = ["multipart/form-data"]
     )
-    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(HttpStatus.NOT_IMPLEMENTED)
     }
 }

samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -176,7 +176,7 @@ class PetApiController() {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(HttpStatus.NOT_IMPLEMENTED)
     }
 }

samples/server/petstore/kotlin-springboot-3/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -106,7 +106,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-3/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -99,5 +99,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-3/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-additionalproperties/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -106,7 +106,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-additionalproperties/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -99,5 +99,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-additionalproperties/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-delegate-nodefaults/src/main/kotlin/org/openapitools/api/PetApi.kt

@@ -199,7 +199,7 @@ interface PetApi {
             produces = ["application/json"],
             consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return getDelegate().uploadFile(petId, additionalMetadata, file)
     }
 }

samples/server/petstore/kotlin-springboot-delegate-nodefaults/src/main/kotlin/org/openapitools/api/PetApiDelegate.kt

@@ -68,6 +68,6 @@ interface PetApiDelegate {
      */
     fun uploadFile(petId: kotlin.Long,
         additionalMetadata: kotlin.String?,
-        file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse>
+        file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse>
 
 }

samples/server/petstore/kotlin-springboot-delegate/src/main/kotlin/org/openapitools/api/PetApi.kt

@@ -198,7 +198,7 @@ interface PetApi {
             produces = ["application/json"],
             consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return getDelegate().uploadFile(petId, additionalMetadata, file)
     }
 }

samples/server/petstore/kotlin-springboot-delegate/src/main/kotlin/org/openapitools/api/PetApiDelegate.kt

@@ -150,7 +150,7 @@ interface PetApiDelegate {
      */
     fun uploadFile(petId: kotlin.Long,
         additionalMetadata: kotlin.String?,
-        file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+        file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         getRequest().ifPresent { request ->
             for (mediaType in MediaType.parseMediaTypes(request.getHeader("Accept"))) {
                 if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {

samples/server/petstore/kotlin-springboot-modelMutable/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -172,7 +172,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-modelMutable/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -90,5 +90,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-modelMutable/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-reactive-without-flow/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -177,7 +177,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    suspend fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    suspend fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-reactive-without-flow/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -100,5 +100,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-reactive-without-flow/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -35,7 +35,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -177,7 +177,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    suspend fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    suspend fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -100,5 +100,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -35,7 +35,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override suspend fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-request-cookie/src/main/kotlin/org/openapitools/api/PetApi.kt

@@ -196,7 +196,7 @@ interface PetApi {
             produces = ["application/json"],
             consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(HttpStatus.NOT_IMPLEMENTED)
     }
 }

samples/server/petstore/kotlin-springboot-source-swagger1/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -175,7 +175,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@ApiParam(value = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@ApiParam(value = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@ApiParam(value = "file detail") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@ApiParam(value = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@ApiParam(value = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@ApiParam(value = "file detail") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-source-swagger1/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -90,5 +90,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-source-swagger1/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-source-swagger2/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -172,7 +172,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@Parameter(description = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@Parameter(description = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@Parameter(description = "file to upload") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-source-swagger2/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -90,5 +90,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-source-swagger2/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-springfox/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -175,7 +175,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile(@ApiParam(value = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@ApiParam(value = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@ApiParam(value = "file detail") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile(@ApiParam(value = "ID of pet to update", required = true) @PathVariable("petId") petId: kotlin.Long,@ApiParam(value = "Additional data to pass to server") @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? ,@ApiParam(value = "file detail") @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot-springfox/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -90,5 +90,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot-springfox/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }

samples/server/petstore/kotlin-springboot-x-kotlin-implements/src/main/kotlin/org/openapitools/api/PetApi.kt

@@ -95,5 +95,5 @@ interface PetApi {
             produces = ["application/json"],
             consumes = ["multipart/form-data"]
     )
-    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse>
+    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse>
 }

samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/PetApiController.kt

@@ -105,7 +105,7 @@ class PetApiController(@Autowired(required = true) val service: PetApiService) {
         produces = ["application/json"],
         consumes = ["multipart/form-data"]
     )
-    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile): ResponseEntity<ModelApiResponse> {
+    fun uploadFile( @PathVariable("petId") petId: kotlin.Long, @Valid @RequestParam(value = "additionalMetadata", required = false) additionalMetadata: kotlin.String? , @Valid @RequestPart("file", required = false) file: org.springframework.web.multipart.MultipartFile?): ResponseEntity<ModelApiResponse> {
         return ResponseEntity(service.uploadFile(petId, additionalMetadata, file), HttpStatus.valueOf(200))
     }
 }

samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/PetApiService.kt

@@ -90,5 +90,5 @@ interface PetApiService {
      * @return successful operation (status code 200)
      * @see PetApi#uploadFile
      */
-    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse
+    fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse
 }

samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/PetApiServiceImpl.kt

@@ -34,7 +34,7 @@ class PetApiServiceImpl : PetApiService {
         TODO("Implement me")
     }
 
-    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile): ModelApiResponse {
+    override fun uploadFile(petId: kotlin.Long, additionalMetadata: kotlin.String?, file: org.springframework.web.multipart.MultipartFile?): ModelApiResponse {
         TODO("Implement me")
     }
 }