[SPRING BOOT] generate EnumConverterConfiguration for resolved inline enums

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java

@@ -615,10 +615,6 @@ public void processOpts() {
                 additionalProperties.put(USE_FEIGN_CLIENT, "true");
             } else if (SPRING_BOOT.equals(library)) {
                 apiTemplateFiles.put("apiController.mustache", "Controller.java");
-                if (containsEnums()) {
-                    supportingFiles.add(new SupportingFile("converter.mustache",
-                            (sourceFolder + File.separator + configPackage).replace(".", java.io.File.separator), "EnumConverterConfiguration.java"));
-                }
                 supportingFiles.add(new SupportingFile("application.mustache",
                         ("src.main.resources").replace(".", java.io.File.separator), "application.properties"));
                 supportingFiles.add(new SupportingFile("homeController.mustache",
@@ -786,6 +782,12 @@ public void addOperationToGroup(String tag, String resourcePath, Operation opera
     @Override
     public void preprocessOpenAPI(OpenAPI openAPI) {
         super.preprocessOpenAPI(openAPI);
+
+        if (!interfaceOnly && SPRING_BOOT.equals(library) && containsEnums()) {
+            supportingFiles.add(new SupportingFile("converter.mustache",
+                    (sourceFolder + File.separator + configPackage).replace(".", java.io.File.separator), "EnumConverterConfiguration.java"));
+        }
+
         /*
          * TODO the following logic should not need anymore in OAS 3.0 if
          * ("/".equals(swagger.getBasePath())) { swagger.setBasePath(""); }

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

@@ -2719,6 +2719,26 @@ public void contractWithEnumContainsEnumConverter() throws IOException {
                 .assertMethod("typeConverter");
     }
 
+    @Test
+    public void contractWithResolvedInnerEnumContainsEnumConverter() throws IOException {
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("spring")
+                .setInputSpec("src/test/resources/3_0/inner_enum.yaml")
+                .addInlineSchemaOption("RESOLVE_INLINE_ENUMS", "true")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        final ClientOptInput clientOptInput = configurator.toClientOptInput();
+        DefaultGenerator generator = new DefaultGenerator();
+        Map<String, File> files = generator.opts(clientOptInput).generate().stream()
+                .collect(Collectors.toMap(File::getName, Function.identity()));
+
+        JavaFileAssert.assertThat(files.get("EnumConverterConfiguration.java"))
+                .assertMethod("ponyTypeConverter");
+    }
+
     @Test
     public void shouldUseTheSameTagNameForTheInterfaceAndTheMethod_issue11570() throws IOException {
         final Map<String, File> output = generateFromContract("src/test/resources/bugs/issue_11570.yml", SPRING_BOOT);

modules/openapi-generator/src/test/resources/3_0/inner_enum.yaml

@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  title: Sample API
+  description: API description in Markdown.
+  version: 1.0.0
+paths:
+  /ponies:
+    get:
+      summary: Returns all animals.
+      description: Optional extended description in Markdown.
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Pony'
+components:
+  schemas:
+    Pony:
+      type: object
+      properties:
+        type:
+          type: string
+          enum:
+            - Earth
+            - Pegasi
+            - Unicorn