fix: issue 23548 (add support for sealed response interfaces for spring-declarative-http-interface) (#23549)

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

Author: tempacc21

modules/openapi-generator/src/main/resources/kotlin-spring/libraries/spring-declarative-http-interface/httpInterfaceReturnTypes.mustache

@@ -1,26 +1,26 @@
 {{! handle reactive map and array}}
 {{#reactive}}
 {{#isMap}}
-{{#reactiveModeReactor}}Mono<{{/reactiveModeReactor}}{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}Map<String, {{{returnType}}}>{{#useResponseEntity}}>{{/useResponseEntity}}{{#reactiveModeReactor}}>{{/reactiveModeReactor}}
+{{#reactiveModeReactor}}Mono<{{/reactiveModeReactor}}{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}Map<String, {{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}>{{#useResponseEntity}}>{{/useResponseEntity}}{{#reactiveModeReactor}}>{{/reactiveModeReactor}}
 {{/isMap}}
 {{#isArray}}
 {{! array handle reactive - reactor with/without ResponseEntity wrapper}}
 {{#reactiveModeReactor}}
-{{#useResponseEntity}}Mono<ResponseEntity<{{/useResponseEntity}}Flux<{{{returnType}}}>{{#useResponseEntity}}>>{{/useResponseEntity}}
+{{#useResponseEntity}}Mono<ResponseEntity<{{/useResponseEntity}}Flux<{{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}>{{#useResponseEntity}}>>{{/useResponseEntity}}
 {{/reactiveModeReactor}}
 {{! array handle reactive - coroutines with/without ResponseEntity wrapper}}
 {{#reactiveModeCoroutines}}
-{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}{{{returnContainer}}}<{{{returnType}}}>{{#useResponseEntity}}>{{/useResponseEntity}}
+{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}{{{returnContainer}}}<{{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}>{{#useResponseEntity}}>{{/useResponseEntity}}
 {{/reactiveModeCoroutines}}
 {{/isArray}}
 {{! handle reactive non-container - with/without ResponseEntity wrapper}}
 {{^returnContainer}}
 {{#reactiveModeReactor}}
-Mono<{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}{{{returnType}}}{{#useResponseEntity}}>{{/useResponseEntity}}>
+Mono<{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}{{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}{{#useResponseEntity}}>{{/useResponseEntity}}>
 {{/reactiveModeReactor}}
 {{#reactiveModeCoroutines}}
 {{#useResponseEntity}}
-ResponseEntity<{{/useResponseEntity}}{{{returnType}}}{{#useResponseEntity}}>
+ResponseEntity<{{/useResponseEntity}}{{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}{{#useResponseEntity}}>
 {{/useResponseEntity}}
 {{/reactiveModeCoroutines}}
 {{/returnContainer}}
@@ -29,19 +29,19 @@ ResponseEntity<{{/useResponseEntity}}{{{returnType}}}{{#useResponseEntity}}>
 {{! handle non-reactive map and array}}
 {{#isMap}}
 {{#useResponseEntity}}
-ResponseEntity<{{/useResponseEntity}}Map<String, {{{returnType}}}>{{#useResponseEntity}}>
+ResponseEntity<{{/useResponseEntity}}Map<String, {{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}>{{#useResponseEntity}}>
 {{/useResponseEntity}}
 {{/isMap}}
 {{#isArray}}
 {{! array handle non-reactive - with/without ResponseEntity wrapper}}
 {{#useResponseEntity}}
-ResponseEntity<{{/useResponseEntity}}{{{returnContainer}}}<{{{returnType}}}>{{#useResponseEntity}}>
+ResponseEntity<{{/useResponseEntity}}{{{returnContainer}}}<{{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}>{{#useResponseEntity}}>
 {{/useResponseEntity}}
 {{/isArray}}
 {{! handle reactive non-container - with/without ResponseEntity wrapper}}
 {{^returnContainer}}
 {{#useResponseEntity}}
-ResponseEntity<{{/useResponseEntity}}{{{returnType}}}{{#useResponseEntity}}>
+ResponseEntity<{{/useResponseEntity}}{{#useSealedResponseInterfaces}}{{#vendorExtensions.x-sealed-response-interface}}{{vendorExtensions.x-sealed-response-interface}}{{/vendorExtensions.x-sealed-response-interface}}{{^vendorExtensions.x-sealed-response-interface}}{{{returnType}}}{{/vendorExtensions.x-sealed-response-interface}}{{/useSealedResponseInterfaces}}{{^useSealedResponseInterfaces}}{{{returnType}}}{{/useSealedResponseInterfaces}}{{#useResponseEntity}}>
 {{/useResponseEntity}}
 {{/returnContainer}}
 {{/reactive}}

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

@@ -5946,4 +5946,39 @@ public void testOneOfRefEnumDiscriminatorResolvesType() throws IOException {
                 "override val vehicleType: VehicleType = VehicleType.TRUCK"
         );
     }
+
+    @Test
+    public void testSealedResponseInterfacesWithDeclarativeHttpInterface() throws IOException {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+        String outputPath = output.getAbsolutePath().replace('\\', '/');
+
+        OpenAPI openAPI = new OpenAPIParser()
+                .readLocation("src/test/resources/3_0/kotlin/sealed-response-interfaces.yaml", null, new ParseOptions()).getOpenAPI();
+
+        KotlinSpringServerCodegen codegen = new KotlinSpringServerCodegen();
+        codegen.setOutputDir(output.getAbsolutePath());
+        codegen.additionalProperties().put(CodegenConstants.MODEL_PACKAGE, "org.openapitools.model");
+        codegen.additionalProperties().put(CodegenConstants.API_PACKAGE, "org.openapitools.api");
+        codegen.additionalProperties().put(CodegenConstants.LIBRARY, "spring-declarative-http-interface");
+        codegen.additionalProperties().put(USE_SEALED_RESPONSE_INTERFACES, "true");
+        codegen.additionalProperties().put(USE_RESPONSE_ENTITY, "true");
+        codegen.additionalProperties().put(REACTIVE, "false");
+        codegen.additionalProperties().put(USE_FLOW_FOR_ARRAY_RETURN_TYPE, "false");
+
+        ClientOptInput input = new ClientOptInput();
+        input.openAPI(openAPI);
+        input.config(codegen);
+
+        DefaultGenerator generator = new DefaultGenerator();
+        generator.opts(input).generate();
+
+        assertFileContains(Paths.get(outputPath + "/src/main/kotlin/org/openapitools/api/DefaultApi.kt"),
+                "import org.openapitools.model.CreateUserResponse",
+                "import org.openapitools.model.GetUserResponse",
+                "fun createUser(",
+                "): ResponseEntity<CreateUserResponse>",
+                "fun getUser(",
+                "): ResponseEntity<GetUserResponse>");
+    }
 }