minor fix

* fix: Use correct constructor for ApiException

* chore: Generate samples

* fix: Missing $

* fix: Remove extraneous line

.github/PULL_REQUEST_TEMPLATE.md

@@ -18,4 +18,5 @@
   You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example `./bin/generate-samples.sh bin/configs/java*`. 
   IMPORTANT: Do **NOT** purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
 - [ ] File the PR against the [correct branch](https://github.com/OpenAPITools/openapi-generator/wiki/Git-Branches): `master` (upcoming `7.x.0` minor release - breaking changes with fallbacks), `8.0.x` (breaking changes without fallbacks)
+- [ ] If your PR solves a reported issue, reference it using [GitHub's linking syntax](https://docs.github.com/en/issues/tracking-your-work-with-issues/using-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword) (e.g., having `"fixes #123"` present in the PR description)
 - [ ] If your PR is targeting a particular programming language, @mention the [technical committee](https://github.com/openapitools/openapi-generator/#62---openapi-generator-technical-committee) members, so they are more likely to review the pull request.

.github/workflows/openapi-generator.yaml

@@ -142,37 +142,19 @@ jobs:
           path: modules/openapi-generator-cli/target
       - name: Delete samples that are entirely generated
         run: |
-          rm -rf samples/client/petstore/csharp/generichost/latest/HelloWorld
-          rm -rf samples/client/petstore/csharp/generichost/latest/Tags
-          rm -rf samples/client/petstore/csharp/generichost/latest/OneOfList
-
-          rm -rf samples/client/petstore/csharp/generichost/net8/AllOf
-          rm -rf samples/client/petstore/csharp/generichost/net8/AnyOf
-          rm -rf samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare
-          rm -rf samples/client/petstore/csharp/generichost/net8/FormModels
-          rm -rf samples/client/petstore/csharp/generichost/net8/NullReferenceTypes
-          rm -rf samples/client/petstore/csharp/generichost/net8/OneOf
-          rm -rf samples/client/petstore/csharp/generichost/net8/Petstore
-          rm -rf samples/client/petstore/csharp/generichost/net8/SourceGeneration
-          rm -rf samples/client/petstore/csharp/generichost/net8/UseDateTimeForDate
-
-          rm -rf samples/client/petstore/csharp/generichost/standard2.0/Petstore
-
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/AllOf
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/AnyOf
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/AnyOfNoCompare
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/FormModels
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/OneOf
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/Petstore
-          rm -rf samples/client/petstore/csharp/generichost/net4.8/UseDateTimeForDate
-
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/AllOf
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/AnyOf
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/AnyOfNoCompare
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/FormModels
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/OneOf
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/Petstore
-          rm -rf samples/client/petstore/csharp/generichost/net4.7/UseDateTimeForDate
+          # List all directories in generichost, filter out Manual directories, and remove the rest
+          cd samples/client/petstore/csharp/generichost
+          for version_dir in */ ; do
+            if [ -d "$version_dir" ]; then
+              cd "$version_dir"
+              for dir in */ ; do
+                if [ -d "$dir" ] && [[ ! "$dir" =~ Manual ]]; then
+                  rm -rf "$dir"
+                fi
+              done
+              cd ..
+            fi
+          done
       - name: Generate samples
         run: |
           bash bin/generate-samples.sh

.github/workflows/samples-cpp-oatpp-server.yaml

@@ -0,0 +1,30 @@
+name: Samples cpp oat++ server
+
+on:
+  push:
+    branches:
+      - "samples/server/petstore/cpp-oatpp/**"
+  pull_request:
+    paths:
+      - "samples/server/petstore/cpp-oatpp/**"
+
+env:
+  GRADLE_VERSION: 6.9
+
+jobs:
+  build:
+    name: Build cpp qt client
+    strategy:
+      matrix:
+        sample:
+          - samples/server/petstore/cpp-oatpp
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        working-directory: ${{ matrix.sample }}
+        run: cmake -B build && cmake --build build --verbose

.github/workflows/samples-java-client-jdk17.yaml

@@ -6,6 +6,7 @@ on:
       - samples/client/petstore/java/resttemplate-jakarta/**
       - samples/client/petstore/java/webclient-jakarta/**
       - samples/client/petstore/java/restclient-*/**
+      - samples/client/others/java/webclient-sealedInterface/**
       - samples/client/petstore/java/webclient-useSingleRequestParameter/**
       - samples/client/others/java/restclient-enum-in-multipart/**
   pull_request:
@@ -13,6 +14,7 @@ on:
       - samples/client/petstore/java/resttemplate-jakarta/**
       - samples/client/petstore/java/webclient-jakarta/**
       - samples/client/petstore/java/restclient-*/**
+      - samples/client/others/java/webclient-sealedInterface/**
       - samples/client/petstore/java/webclient-useSingleRequestParameter/**
       - samples/client/others/java/restclient-enum-in-multipart/**
 jobs:
@@ -31,6 +33,7 @@ jobs:
           - samples/client/petstore/java/restclient-swagger2
           - samples/client/petstore/java/restclient-useSingleRequestParameter
           - samples/client/petstore/java/restclient-useSingleRequestParameter-static
+          - samples/client/others/java/webclient-sealedInterface
           - samples/client/petstore/java/webclient-useSingleRequestParameter
           - samples/client/others/java/restclient-enum-in-multipart
     steps:

.github/workflows/samples-php-client.yaml

@@ -0,0 +1,45 @@
+name: Samples PHP clients
+
+on:
+  push:
+    paths:
+      - samples/client/petstore/php/OpenAPIClient-php/**
+  pull_request:
+    paths:
+      - samples/client/petstore/php/OpenAPIClient-php/**
+jobs:
+  build:
+    name: Build PHP projects
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php:
+          - "8.1"
+          - "8.2"
+          - "8.3"
+          - "8.4"
+        sample:
+          # clients
+          - samples/client/petstore/php/OpenAPIClient-php/
+    services:
+      petstore-api:
+        image: swaggerapi/petstore
+        ports:
+          - 80:8080
+        env:
+          SWAGGER_HOST: http://petstore.swagger.io
+          SWAGGER_BASE_PATH: /v2
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup PHP with tools
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "${{ matrix.php }}"
+          tools: php-cs-fixer, phpunit
+      - name: composer install
+        working-directory: ${{ matrix.sample }}
+        run: composer install
+      - name: phpunit
+        working-directory: ${{ matrix.sample }}
+        run: vendor/bin/phpunit tests

.github/workflows/samples-r-petstore.yaml

@@ -0,0 +1,43 @@
+name: Samples R Petstore
+
+on:
+  push:
+    paths:
+      - 'samples/client/petstore/R/**'
+  pull_request:
+    paths:
+      - 'samples/client/petstore/R/**'
+
+jobs:
+  build:
+    name: Build R
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sample:
+          - 'samples/client/petstore/R/'
+    services:
+      petstore-api:
+        image: swaggerapi/petstore
+        ports:
+          - 80:8080
+        env:
+          SWAGGER_HOST: http://petstore.swagger.io
+          SWAGGER_BASE_PATH: /v2
+    steps:
+      - uses: actions/checkout@v4
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: 3.6.1
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          cache-version: 2
+      - name: Install curl
+        run: sudo apt-get install -y r-cran-curl
+      - name: build and test
+        working-directory: ${{ matrix.sample }}
+        run: |
+          # export _R_CHECK_FORCE_SUGGESTS_=false
+          /bin/bash build_and_test.bash
+        shell: bash

README.md

@@ -92,7 +92,7 @@ OpenAPI Generator allows generation of API client libraries (SDK generation), se
 |                                  | Languages/Frameworks                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
 | -------------------------------- |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | **API clients**                  | **ActionScript**, **Ada**, **Apex**, **Bash**, **C**, **C#** (.net 2.0, 3.5 or later, .NET Standard 1.3 - 2.1, .NET Core 3.1, .NET 5.0. Libraries: RestSharp, GenericHost, HttpClient), **C++** (Arduino, cpp-restsdk, Qt5, Tizen, Unreal Engine 4), **Clojure**, **Crystal**, **Dart**, **Elixir**, **Elm**, **Eiffel**, **Erlang**, **Go**, **Groovy**, **Haskell** (http-client, Servant), **Java** (Apache HttpClient 4.x, Apache HttpClient 5.x, Jersey2.x, OkHttp, Retrofit1.x, Retrofit2.x, Feign, RestTemplate, RESTEasy, Vertx, Google API Client Library for Java, Rest-assured, Spring 5 Web Client, Spring 6 RestClient, MicroProfile Rest Client, Helidon), **Jetbrains HTTP Client**, **Julia**, **k6**, **Kotlin**, **Lua**, **N4JS**, **Nim**, **Node.js/JavaScript** (ES5, ES6, AngularJS with Google Closure Compiler annotations, Flow types, Apollo GraphQL DataStore), **Objective-C**, **OCaml**, **Perl**, **PHP**, **PowerShell**, **Python**, **R**, **Ruby**, **Rust** (hyper, reqwest, rust-server), **Scala** (akka, http4s, scalaz, sttp, swagger-async-httpclient, pekko), **Swift** (2.x, 3.x, 4.x, 5.x, 6.x), **Typescript** (AngularJS, Angular (9.x - 19.x), Aurelia, Axios, Fetch, Inversify, jQuery, Nestjs, Node, redux-query, Rxjs), **XoJo**, **Zapier** |
-| **Server stubs**                 | **Ada**, **C#** (ASP.NET Core, Azure Functions), **C++** (Pistache, Restbed, Qt5 QHTTPEngine), **Erlang**, **F#** (Giraffe), **Go** (net/http, Gin, Echo), **Haskell** (Servant, Yesod), **Java** (MSF4J, Spring, Undertow, JAX-RS: CDI, CXF, Inflector, Jersey, RestEasy, Play Framework, [PKMST](https://github.com/ProKarma-Inc/pkmst-getting-started-examples), [Vert.x](https://vertx.io/), [Apache Camel](https://camel.apache.org/), [Helidon](https://helidon.io/)), **Julia**, **Kotlin** (Spring Boot, [Ktor](https://github.com/ktorio/ktor), [Vert.x](https://vertx.io/)), **PHP** ([Flight](https://docs.flightphp.com/), Laravel, Lumen, [Mezzio (fka Zend Expressive)](https://github.com/mezzio/mezzio), Slim, Silex, [Symfony](https://symfony.com/)), **Python** (FastAPI, Flask), **NodeJS**, **Ruby** (Sinatra, Rails5), **Rust** ([rust-server](https://openapi-generator.tech/docs/generators/rust-server/)), **Scala** (Akka, [Finch](https://github.com/finagle/finch), [Lagom](https://github.com/lagom/lagom), [Play](https://www.playframework.com/), [Cask](https://github.com/com-lihaoyi/cask), Scalatra)                                                                                                                                                    |
+| **Server stubs**                 | **Ada**, **C#** (ASP.NET Core, Azure Functions), **C++** (Oat++, Pistache, Restbed, Qt5 QHTTPEngine), **Erlang**, **F#** (Giraffe), **Go** (net/http, Gin, Echo), **Haskell** (Servant, Yesod), **Java** (MSF4J, Spring, Undertow, JAX-RS: CDI, CXF, Inflector, Jersey, RestEasy, Play Framework, [PKMST](https://github.com/ProKarma-Inc/pkmst-getting-started-examples), [Vert.x](https://vertx.io/), [Apache Camel](https://camel.apache.org/), [Helidon](https://helidon.io/)), **Julia**, **Kotlin** (Spring Boot, [Ktor](https://github.com/ktorio/ktor), [Vert.x](https://vertx.io/)), **PHP** ([Flight](https://docs.flightphp.com/), Laravel, Lumen, [Mezzio (fka Zend Expressive)](https://github.com/mezzio/mezzio), Slim, Silex, [Symfony](https://symfony.com/)), **Python** (FastAPI, Flask), **NodeJS**, **Ruby** (Sinatra, Rails5), **Rust** ([rust-server](https://openapi-generator.tech/docs/generators/rust-server/)), **Scala** (Akka, [Finch](https://github.com/finagle/finch), [Lagom](https://github.com/lagom/lagom), [Play](https://www.playframework.com/), [Cask](https://github.com/com-lihaoyi/cask), Scalatra)                                                                                                                                                    |
 | **API documentation generators** | **HTML**, **Confluence Wiki**, **Asciidoc**, **Markdown**, **PlantUML**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | **Configuration files**          | [**Apache2**](https://httpd.apache.org/)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
 | **Others**                       | **GraphQL**, **JMeter**, **Ktorm**, **MySQL Schema**, **Postman Collection**, **Protocol Buffer**, **WSDL**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
@@ -1128,6 +1128,7 @@ Here is a list of template creators:
    * C# Azure functions: @Abrhm7786
    * C# NancyFX: @mstefaniuk
    * C++ (Qt5 QHttpEngine): @etherealjoy
+   * C++ Oat++: @Kraust
    * C++ Pistache: @sebymiano
    * C++ Restbed: @stkrwork
    * Erlang Server: @galaxie @nelsonvides
@@ -1269,7 +1270,7 @@ If you want to join the committee, please kindly apply by sending an email to te
 | Python                | @cbornet (2017/09) @tomplus (2018/10) @krjakbrjak (2023/02) @fa0311 (2023/10) @multani (2023/10) |
 | R                     | @Ramanth (2019/07) @saigiridhar21 (2019/07)                                                                                                                                                                                                           |
 | Ruby                  | @cliffano (2017/07) @zlx (2017/09) @autopp (2019/02)                                                                                                                                                                                                  |
-| Rust                  | @frol (2017/07) @farcaller (2017/08) @richardwhiuk (2019/07) @paladinzh (2020/05) @jacob-pro (2022/10)                                                                                                                                                |
+| Rust                  | @frol (2017/07) @farcaller (2017/08) @richardwhiuk (2019/07) @paladinzh (2020/05) @jacob-pro (2022/10) @@dsteeley (2025/07)                                                                                                                                               |
 | Scala                 | @clasnake (2017/07), @shijinkui  (2018/01), @ramzimaalej (2018/03), @chameleon82 (2020/03), @Bouillie (2020/04) @fish86 (2023/06)                                                               |
 | Swift                 | @jgavris (2017/07) @ehyche (2017/08) @Edubits (2017/09) @jaz-ah (2017/09) @4brunu (2019/11) @dydus0x14 (2023/06)                                                                                                                                                           |
 | TypeScript            | @TiFu (2017/07) @taxpon (2017/07) @sebastianhaas (2017/07) @kenisteward (2017/07) @Vrolijkx (2017/09) @macjohnny (2018/01) @topce (2018/10) @akehir (2019/07) @petejohansonxo (2019/11) @amakhrov (2020/02) @davidgamero (2022/03) @mkusaka (2022/04) @joscha (2024/10)    |

bin/configs/cpp-oatpp-server-cpp-oatpp.yaml

@@ -0,0 +1,6 @@
+generatorName: cpp-oatpp-server
+outputDir: samples/server/petstore/cpp-oatpp
+inputSpec: modules/openapi-generator/src/test/resources/3_0/cpp-oatpp-server/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/cpp-oatpp-server
+additionalProperties:
+  addExternalLibs: "true"

bin/configs/java-webclient-sealedInterface.yaml

@@ -0,0 +1,10 @@
+generatorName: java
+outputDir: samples/client/others/java/webclient-sealedInterface
+library: webclient
+inputSpec: modules/openapi-generator/src/test/resources/3_0/oneof_polymorphism_and_inheritance.yaml
+templateDir: modules/openapi-generator/src/main/resources/Java
+additionalProperties:
+  artifactId: sealed-interface-webclient
+  hideGenerationTimestamp: "true"
+  useOneOfInterfaces: true
+  useSealedOneOfInterfaces: true

bin/configs/manual/rust-axum-apikey-authorization.yaml

@@ -0,0 +1,14 @@
+generatorName: rust-axum
+outputDir: samples/server/petstore/rust-axum/output/apikey-authorization
+inputSpec: modules/openapi-generator/src/test/resources/3_0/jetbrains/CheckoutBasicBearerCookieQueryHeaderBasicBearer.yaml
+templateDir: modules/openapi-generator/src/main/resources/rust-axum
+generateAliasAsModel: true
+additionalProperties:
+  hideGenerationTimestamp: "true"
+  packageName: apikey-authorization
+  basicAuthorization: true
+  basicAnalytic: true
+  ownedRequest: true
+globalProperties:
+  skipFormModel: false
+enablePostProcessFile: true

bin/configs/typescript-angular-v20.yaml

@@ -0,0 +1,8 @@
+generatorName: typescript-angular
+outputDir: samples/client/petstore/typescript-angular-v20/builds/default
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/typescript-angular
+additionalProperties:
+  ngVersion: 20.0.0
+  npmName: sample-angular-20-0-0
+  supportsES6: true

bitrise.yml

@@ -48,4 +48,4 @@ workflows:
 
 meta:
   bitrise.io:
-    stack: osx-xcode-16.0.x
+    stack: osx-xcode-16.3.x

docs/generators.md

@@ -87,6 +87,7 @@ The following generators are available:
 * [ada-server](generators/ada-server.md)  
 * [aspnet-fastendpoints](generators/aspnet-fastendpoints.md)  
 * [aspnetcore](generators/aspnetcore.md)  
+* [cpp-oatpp-server](generators/cpp-oatpp-server.md)  
 * [cpp-pistache-server](generators/cpp-pistache-server.md)  
 * [cpp-qt-qhttpengine-server](generators/cpp-qt-qhttpengine-server.md)  
 * [cpp-restbed-server](generators/cpp-restbed-server.md)  

docs/generators/README.md

@@ -65,6 +65,7 @@ The following generators are available:
 ## SERVER generators
 * [ada-server](ada-server.md)  
 * [aspnetcore](aspnetcore.md)  
+* [cpp-oatpp-server](cpp-oatpp-server.md)  
 * [cpp-pistache-server](cpp-pistache-server.md)  
 * [cpp-qt5-qhttpengine-server](cpp-qt5-qhttpengine-server.md)  
 * [cpp-restbed-server](cpp-restbed-server.md)  

docs/generators/cpp-oatpp-server.md

@@ -0,0 +1,262 @@
+---
+title: Documentation for the cpp-oatpp-server Generator
+---
+
+## METADATA
+
+| Property | Value | Notes |
+| -------- | ----- | ----- |
+| generator name | cpp-oatpp-server | pass this to the generate command after -g |
+| generator stability | STABLE | |
+| generator type | SERVER | |
+| generator language | C++ | |
+| generator default templating engine | mustache | |
+| helpTxt | Generates a C++ API server (based on Oat++) | |
+
+## CONFIG OPTIONS
+These options may be applied as additional-properties (cli) or configOptions (plugins). Refer to [configuration docs](https://openapi-generator.tech/docs/configuration) for more details.
+
+| Option | Description | Values | Default |
+| ------ | ----------- | ------ | ------- |
+|addExternalLibs|Add the Possibility to fetch and compile external Libraries needed by this Framework.| |true|
+|reservedWordPrefix|Prefix to prepend to reserved words in order to avoid conflicts| |r_|
+|variableNameFirstCharacterUppercase|Make first character of variable name uppercase (eg. value -> Value)| |true|
+
+## IMPORT MAPPING
+
+| Type/Alias | Imports |
+| ---------- | ------- |
+
+
+## INSTANTIATION TYPES
+
+| Type/Alias | Instantiated By |
+| ---------- | --------------- |
+
+
+## LANGUAGE PRIMITIVES
+
+<ul class="column-ul">
+<li>oatpp::Any</li>
+<li>oatpp::Boolean</li>
+<li>oatpp::Fields</li>
+<li>oatpp::Float64</li>
+<li>oatpp::Int32</li>
+<li>oatpp::Int64</li>
+<li>oatpp::Object</li>
+<li>oatpp::String</li>
+<li>oatpp::UnorderedSet</li>
+<li>oatpp::Vector</li>
+</ul>
+
+## RESERVED WORDS
+
+<ul class="column-ul">
+<li>NULL</li>
+<li>alignas</li>
+<li>alignof</li>
+<li>and</li>
+<li>and_eq</li>
+<li>asm</li>
+<li>auto</li>
+<li>bitand</li>
+<li>bitor</li>
+<li>bool</li>
+<li>break</li>
+<li>case</li>
+<li>catch</li>
+<li>char</li>
+<li>char16_t</li>
+<li>char32_t</li>
+<li>class</li>
+<li>compl</li>
+<li>concept</li>
+<li>const</li>
+<li>const_cast</li>
+<li>constexpr</li>
+<li>continue</li>
+<li>decltype</li>
+<li>default</li>
+<li>delete</li>
+<li>do</li>
+<li>double</li>
+<li>dynamic_cast</li>
+<li>else</li>
+<li>enum</li>
+<li>explicit</li>
+<li>export</li>
+<li>extern</li>
+<li>false</li>
+<li>float</li>
+<li>for</li>
+<li>friend</li>
+<li>goto</li>
+<li>if</li>
+<li>inline</li>
+<li>int</li>
+<li>linux</li>
+<li>long</li>
+<li>mutable</li>
+<li>namespace</li>
+<li>new</li>
+<li>noexcept</li>
+<li>not</li>
+<li>not_eq</li>
+<li>nullptr</li>
+<li>operator</li>
+<li>or</li>
+<li>or_eq</li>
+<li>private</li>
+<li>protected</li>
+<li>public</li>
+<li>register</li>
+<li>reinterpret_cast</li>
+<li>requires</li>
+<li>return</li>
+<li>short</li>
+<li>signed</li>
+<li>sizeof</li>
+<li>static</li>
+<li>static_assert</li>
+<li>static_cast</li>
+<li>struct</li>
+<li>switch</li>
+<li>template</li>
+<li>this</li>
+<li>thread_local</li>
+<li>throw</li>
+<li>true</li>
+<li>try</li>
+<li>typedef</li>
+<li>typeid</li>
+<li>typename</li>
+<li>union</li>
+<li>unsigned</li>
+<li>using</li>
+<li>virtual</li>
+<li>void</li>
+<li>volatile</li>
+<li>wchar_t</li>
+<li>while</li>
+<li>xor</li>
+<li>xor_eq</li>
+</ul>
+
+## FEATURE SET
+
+
+### Client Modification Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|BasePath|✗|ToolingExtension
+|Authorizations|✗|ToolingExtension
+|UserAgent|✗|ToolingExtension
+|MockServer|✗|ToolingExtension
+
+### Data Type Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|Custom|✗|OAS2,OAS3
+|Int32|✓|OAS2,OAS3
+|Int64|✓|OAS2,OAS3
+|Float|✓|OAS2,OAS3
+|Double|✓|OAS2,OAS3
+|Decimal|✓|ToolingExtension
+|String|✓|OAS2,OAS3
+|Byte|✓|OAS2,OAS3
+|Binary|✓|OAS2,OAS3
+|Boolean|✓|OAS2,OAS3
+|Date|✓|OAS2,OAS3
+|DateTime|✓|OAS2,OAS3
+|Password|✓|OAS2,OAS3
+|File|✓|OAS2
+|Uuid|✗|
+|Array|✓|OAS2,OAS3
+|Null|✗|OAS3
+|AnyType|✗|OAS2,OAS3
+|Object|✓|OAS2,OAS3
+|Maps|✓|ToolingExtension
+|CollectionFormat|✓|OAS2
+|CollectionFormatMulti|✓|OAS2
+|Enum|✓|OAS2,OAS3
+|ArrayOfEnum|✓|ToolingExtension
+|ArrayOfModel|✓|ToolingExtension
+|ArrayOfCollectionOfPrimitives|✓|ToolingExtension
+|ArrayOfCollectionOfModel|✓|ToolingExtension
+|ArrayOfCollectionOfEnum|✓|ToolingExtension
+|MapOfEnum|✓|ToolingExtension
+|MapOfModel|✓|ToolingExtension
+|MapOfCollectionOfPrimitives|✓|ToolingExtension
+|MapOfCollectionOfModel|✓|ToolingExtension
+|MapOfCollectionOfEnum|✓|ToolingExtension
+
+### Documentation Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|Readme|✓|ToolingExtension
+|Model|✓|ToolingExtension
+|Api|✓|ToolingExtension
+
+### Global Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|Host|✓|OAS2,OAS3
+|BasePath|✓|OAS2,OAS3
+|Info|✓|OAS2,OAS3
+|Schemes|✗|OAS2,OAS3
+|PartialSchemes|✓|OAS2,OAS3
+|Consumes|✓|OAS2
+|Produces|✓|OAS2
+|ExternalDocumentation|✓|OAS2,OAS3
+|Examples|✓|OAS2,OAS3
+|XMLStructureDefinitions|✗|OAS2,OAS3
+|MultiServer|✗|OAS3
+|ParameterizedServer|✗|OAS3
+|ParameterStyling|✗|OAS3
+|Callbacks|✗|OAS3
+|LinkObjects|✗|OAS3
+
+### Parameter Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|Path|✓|OAS2,OAS3
+|Query|✓|OAS2,OAS3
+|Header|✓|OAS2,OAS3
+|Body|✓|OAS2
+|FormUnencoded|✓|OAS2
+|FormMultipart|✓|OAS2
+|Cookie|✗|OAS3
+
+### Schema Support Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|Simple|✓|OAS2,OAS3
+|Composite|✓|OAS2,OAS3
+|Polymorphism|✗|OAS2,OAS3
+|Union|✗|OAS3
+|allOf|✗|OAS2,OAS3
+|anyOf|✗|OAS3
+|oneOf|✗|OAS3
+|not|✗|OAS3
+
+### Security Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|BasicAuth|✗|OAS2,OAS3
+|ApiKey|✗|OAS2,OAS3
+|OpenIDConnect|✗|OAS3
+|BearerToken|✗|OAS3
+|OAuth2_Implicit|✗|OAS2,OAS3
+|OAuth2_Password|✗|OAS2,OAS3
+|OAuth2_ClientCredentials|✗|OAS2,OAS3
+|OAuth2_AuthorizationCode|✗|OAS2,OAS3
+|SignatureAuth|✗|OAS3
+|AWSV4Signature|✗|ToolingExtension
+
+### Wire Format Feature
+| Name | Supported | Defined By |
+| ---- | --------- | ---------- |
+|JSON|✓|OAS2,OAS3
+|XML|✓|OAS2,OAS3
+|PROTOBUF|✗|ToolingExtension
+|Custom|✗|OAS2,OAS3

docs/generators/java-microprofile.md

@@ -66,7 +66,9 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |licenseName|The name of the license| |Unlicense|
 |licenseUrl|The URL of the license| |http://unlicense.org|
 |microprofileFramework|Framework for microprofile. Possible values "kumuluzee"| |null|
+|microprofileGlobalExceptionMapper|Should ApiExceptionMapper be annotated with @Provider making it a global exception mapper| |true|
 |microprofileMutiny|Whether to use async types for microprofile (currently only Smallrye Mutiny is supported).| |null|
+|microprofileRegisterExceptionMapper|Should generated API Clients be annotated with @RegisterProvider(ApiExceptionMapper.class).| |true|
 |microprofileRestClientVersion|Version of MicroProfile Rest Client API.| |null|
 |modelPackage|package for generated models| |org.openapitools.client.model|
 |openApiNullable|Enable OpenAPI Jackson Nullable library. Not supported by `microprofile` library.| |true|
@@ -101,6 +103,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useRuntimeException|Use RuntimeException instead of Exception. Only jersey2, jersey3, okhttp-gson, vertx, microprofile support this option.| |false|
 |useRxJava2|Whether to use the RxJava2 adapter with the retrofit2 library. IMPORTANT: This option has been deprecated.| |false|
 |useRxJava3|Whether to use the RxJava3 adapter with the retrofit2 library. IMPORTANT: This option has been deprecated.| |false|
+|useSealedOneOfInterfaces|Generate the oneOf interfaces as sealed interfaces. Only supported for WebClient and RestClient.| |false|
 |useSingleRequestParameter|Setting this property to "true" will generate functions with a single argument containing all API endpoint parameters instead of one argument per parameter. ONLY native, jersey2, jersey3, okhttp-gson, microprofile, Spring RestClient, Spring WebClient support this option. Setting this property to "static" does the same as "true", but also makes the generated arguments class static with single parameter instantiation.| |false|
 |webclientBlockingOperations|Making all WebClient operations blocking(sync). Note that if on operation 'x-webclient-blocking: false' then such operation won't be sync| |false|
 |withAWSV4Signature|whether to include AWS v4 signature support (only available for okhttp-gson library)| |false|

docs/generators/java.md

@@ -66,7 +66,9 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |licenseName|The name of the license| |Unlicense|
 |licenseUrl|The URL of the license| |http://unlicense.org|
 |microprofileFramework|Framework for microprofile. Possible values "kumuluzee"| |null|
+|microprofileGlobalExceptionMapper|Should ApiExceptionMapper be annotated with @Provider making it a global exception mapper| |true|
 |microprofileMutiny|Whether to use async types for microprofile (currently only Smallrye Mutiny is supported).| |null|
+|microprofileRegisterExceptionMapper|Should generated API Clients be annotated with @RegisterProvider(ApiExceptionMapper.class).| |true|
 |microprofileRestClientVersion|Version of MicroProfile Rest Client API.| |null|
 |modelPackage|package for generated models| |org.openapitools.client.model|
 |openApiNullable|Enable OpenAPI Jackson Nullable library. Not supported by `microprofile` library.| |true|
@@ -101,6 +103,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |useRuntimeException|Use RuntimeException instead of Exception. Only jersey2, jersey3, okhttp-gson, vertx, microprofile support this option.| |false|
 |useRxJava2|Whether to use the RxJava2 adapter with the retrofit2 library. IMPORTANT: This option has been deprecated.| |false|
 |useRxJava3|Whether to use the RxJava3 adapter with the retrofit2 library. IMPORTANT: This option has been deprecated.| |false|
+|useSealedOneOfInterfaces|Generate the oneOf interfaces as sealed interfaces. Only supported for WebClient and RestClient.| |false|
 |useSingleRequestParameter|Setting this property to "true" will generate functions with a single argument containing all API endpoint parameters instead of one argument per parameter. ONLY native, jersey2, jersey3, okhttp-gson, microprofile, Spring RestClient, Spring WebClient support this option. Setting this property to "static" does the same as "true", but also makes the generated arguments class static with single parameter instantiation.| |false|
 |webclientBlockingOperations|Making all WebClient operations blocking(sync). Note that if on operation 'x-webclient-blocking: false' then such operation won't be sync| |false|
 |withAWSV4Signature|whether to include AWS v4 signature support (only available for okhttp-gson library)| |false|

docs/generators/typescript-angular.md

@@ -11,7 +11,7 @@ title: Documentation for the typescript-angular Generator
 | generator type | CLIENT | |
 | generator language | Typescript | |
 | generator default templating engine | mustache | |
-| helpTxt | Generates a TypeScript Angular (9.x - 19.x) client library. | |
+| helpTxt | Generates a TypeScript Angular (9.x - 20.x) client library. | |
 
 ## CONFIG OPTIONS
 These options may be applied as additional-properties (cli) or configOptions (plugins). Refer to [configuration docs](https://openapi-generator.tech/docs/configuration) for more details.
@@ -34,7 +34,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |modelPropertyNaming|Naming convention for the property: 'camelCase', 'PascalCase', 'snake_case' and 'original', which keeps the original name. Only change it if you provide your own run-time code for (de-)serialization of models| |original|
 |modelSuffix|The suffix of the generated model.| |null|
 |ngPackagrVersion|The version of ng-packagr compatible with Angular (see ngVersion option).| |null|
-|ngVersion|The version of Angular. (At least 9.0.0)| |19.0.0|
+|ngVersion|The version of Angular. (At least 9.0.0)| |20.0.0|
 |npmName|The name under which you want to publish generated npm package. Required to generate a full package| |null|
 |npmRepository|Use this property to set an url your private npmRepo in the package.json| |null|
 |npmVersion|The version of your npm package. If not provided, using the version from the OpenAPI specification file.| |1.0.0|

docs/generators/typescript.md

@@ -42,6 +42,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |sortModelPropertiesByRequiredFlag|Sort model properties to place required parameters before optional parameters.| |true|
 |sortParamsByRequiredFlag|Sort method arguments to place required parameters before optional parameters.| |true|
 |supportsES6|Generate code that conforms to ES6.| |false|
+|useErasableSyntax|Use erasable syntax for the generated code. This is a temporary feature and will be removed in the future.| |false|
 |useInversify|Enable this to generate decorators and service identifiers for the InversifyJS inversion of control container. If you set 'deno' as 'platform', the generator will process this value as 'disable'.| |false|
 |useObjectParameters|Use aggregate parameter objects as function arguments for api operations instead of passing each parameter as a separate function argument.| |false|
 |useRxJS|Enable this to internally use rxjs observables. If disabled, a stub is used instead. This is required for the 'angular' framework.| |false|

modules/openapi-generator-gradle-plugin/src/main/kotlin/org/openapitools/generator/gradle/plugin/OpenApiGeneratorPlugin.kt

@@ -85,6 +85,7 @@ class OpenApiGeneratorPlugin : Plugin<Project> {
 
                     inputSpec.set(validate.inputSpec)
                     recommend.set(validate.recommend)
+                    treatWarningsAsErrors.set(validate.treatWarningsAsErrors)
                 }
 
                 register("openApiGenerate", GenerateTask::class.java).configure {

modules/openapi-generator-gradle-plugin/src/main/kotlin/org/openapitools/generator/gradle/plugin/extensions/OpenApiGeneratorValidateExtension.kt

@@ -34,4 +34,9 @@ open class OpenApiGeneratorValidateExtension(project: Project) {
      * Whether to offer recommendations related to the validated specification document.
      */
     val recommend = project.objects.property<Boolean>().convention(true)
+
+    /**
+     * Whether to treat warnings as errors and fail the task.
+     */
+    val treatWarningsAsErrors = project.objects.property<Boolean>().convention(false)
 }

modules/openapi-generator-gradle-plugin/src/main/kotlin/org/openapitools/generator/gradle/plugin/tasks/ValidateTask.kt

@@ -60,6 +60,10 @@ open class ValidateTask : DefaultTask() {
     @Input
     val recommend = project.objects.property<Boolean>().convention(true)
 
+    @Optional
+    @Input
+    val treatWarningsAsErrors = project.objects.property<Boolean>().convention(false)
+
     @get:Internal
     @set:Option(option = "input", description = "The input specification.")
     var input: String? = null
@@ -73,6 +77,7 @@ open class ValidateTask : DefaultTask() {
 
         val spec = inputSpec.get()
         val recommendations = recommend.get()
+        val failOnWarnings = treatWarningsAsErrors.get()
 
         logger.quiet("Validating spec $spec")
 
@@ -117,10 +122,16 @@ open class ValidateTask : DefaultTask() {
             }
 
             throw GradleException("Validation failed.")
-        } else {
-            out.withStyle(StyledTextOutput.Style.Success)
-            logger.debug("No error validations from swagger-parser or internal validations.")
-            out.println("Spec is valid.")
         }
+
+        if (failOnWarnings && validationResult.warnings.isNotEmpty()) {
+            out.withStyle(StyledTextOutput.Style.Error)
+            out.println("\nWarnings found in the spec and 'treatWarningsAsErrors' is enabled.\nFailing validation.\n")
+            throw GradleException("Validation failed due to warnings (treatWarningsAsErrors = true).")
+        }
+
+        out.withStyle(StyledTextOutput.Style.Success)
+        logger.debug("No error validations from swagger-parser or internal validations.")
+        out.println("Spec is valid.")
     }
 }

modules/openapi-generator-gradle-plugin/src/test/kotlin/GenerateTaskDslTest.kt

@@ -34,6 +34,7 @@ class GenerateTaskDslTest : TestBase() {
     @Test
     fun `openApiGenerate should create an expected file structure from URL config`() {
         val specUrl = "https://raw.githubusercontent.com/OpenAPITools/openapi-generator/b6b8c0db872fb4a418ae496e89c7e656e14be165/modules/openapi-generator-gradle-plugin/src/test/resources/specs/petstore-v3.0.yaml"
+        val urlParams ="?meaningless=params&so=it&results=in&illegal=filenames&on=windows"
         // Arrange
         val buildContents = """
          plugins {
@@ -41,7 +42,7 @@ class GenerateTaskDslTest : TestBase() {
         }
         openApiGenerate {
             generatorName = "kotlin"
-            remoteInputSpec = "$specUrl"
+            remoteInputSpec = "$specUrl$urlParams"
             outputDir = file("build/kotlin").absolutePath
             apiPackage = "org.openapitools.example.api"
             invokerPackage = "org.openapitools.example.invoker"

modules/openapi-generator-gradle-plugin/src/test/kotlin/ValidateTaskDslTest.kt

@@ -308,6 +308,48 @@ class ValidateTaskDslTest : TestBase() {
         )
     }
 
+    @Test(dataProvider = "gradle_version_provider")
+    fun `openApiValidate should fail with treatWarningsAsErrors on valid spec with warnings`(gradleVersion: String?) {
+        // Arrange
+        val projectFiles = mapOf(
+            "spec.yaml" to javaClass.classLoader.getResourceAsStream("specs/petstore-v3.0-recommend.yaml")
+        )
+
+        withProject(
+            """
+            | plugins {
+            |   id 'org.openapi.generator'
+            | }
+            |
+            | openApiValidate {
+            |   inputSpec = file("spec.yaml").absolutePath
+            |   treatWarningsAsErrors = true
+            | }
+        """.trimMargin(), projectFiles
+        )
+
+        // Act
+        val result = getGradleRunner(gradleVersion)
+            .withProjectDir(temp)
+            .withArguments("openApiValidate")
+            .withPluginClasspath()
+            .buildAndFail()
+
+        // Assert
+        assertTrue(
+            result.output.contains("Spec has issues or recommendations."),
+            "Unexpected/no message presented to the user for a valid spec."
+        )
+        assertTrue(
+            result.output.contains("Failing validation."),
+            "Expected validation to fail due to warnings, but no failure message was found."
+        )
+        assertEquals(
+            FAILED, result.task(":openApiValidate")?.outcome,
+            "Expected a failed run, but found ${result.task(":openApiValidate")?.outcome}"
+        )
+    }
+
     @Test(dataProvider = "gradle_version_provider")
     fun `openApiValidate should succeed without recommendations on valid spec`(gradleVersion: String?) {
         // Arrange

modules/openapi-generator-maven-plugin/src/main/java/org/openapitools/codegen/plugin/CodeGenMojo.java

@@ -1066,7 +1066,7 @@ public class CodeGenMojo extends AbstractMojo {
         String name = inputSpecFile.getName();
 
         URL url = inputSpecRemoteUrl();
-        if (inputSpecFile.exists() && url != null) {
+        if (url != null) {
             String[] segments = url.getPath().split("/");
             name = Files.getNameWithoutExtension(segments[segments.length - 1]);
         }

modules/openapi-generator-maven-plugin/src/test/java/org/openapitools/codegen/plugin/CodeGenMojoTest.java

@@ -68,6 +68,10 @@ public class CodeGenMojoTest extends BaseTestCase {
         testCommonConfiguration("jar");
     }
 
+    public void testCommonConfigurationWithRemoteInputSpec() throws Exception {
+        testCommonConfiguration("remote");
+    }
+
     @SuppressWarnings("unchecked")
     private void testCommonConfiguration(String profile) throws Exception {
         CodeGenMojo mojo = loadMojo(newTempFolder(), "src/test/resources/default", profile);

modules/openapi-generator-maven-plugin/src/test/resources/default/pom.xml

@@ -55,6 +55,12 @@
                 </dependency>
             </dependencies>
         </profile>
+        <profile>
+            <id>remote</id>
+            <properties>
+                <inputSpec>https://raw.githubusercontent.com/OpenAPITools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml?meaningless=params&amp;so=it&amp;results=in&amp;illegal=filenames&amp;on=windows</inputSpec>
+            </properties>
+        </profile>
     </profiles>
     <build>
         <finalName>common-maven</finalName>

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

@@ -31,7 +31,8 @@ import java.util.*;
 public class CodegenParameter implements IJsonSchemaValidationProperties {
     public boolean isFormParam, isQueryParam, isPathParam, isHeaderParam,
             isCookieParam, isBodyParam, isContainer,
-            isCollectionFormatMulti, isPrimitiveType, isModel, isExplode, isDeepObject, isMatrix, isAllowEmptyValue;
+            isCollectionFormatMulti, isPrimitiveType, isModel, isExplode, isDeepObject, isMatrix, isAllowEmptyValue,
+            isFormStyle, isSpaceDelimited, isPipeDelimited;
     public String baseName, paramName, dataType, datatypeWithEnum, dataFormat, contentType,
             collectionFormat, description, unescapedDescription, baseType, defaultValue, enumDefaultValue, enumName, style;
 
@@ -268,6 +269,9 @@ public class CodegenParameter implements IJsonSchemaValidationProperties {
         output.isExplode = this.isExplode;
         output.style = this.style;
         output.isDeepObject = this.isDeepObject;
+        output.isFormStyle = this.isFormStyle;
+        output.isSpaceDelimited = this.isSpaceDelimited;
+        output.isPipeDelimited = this.isPipeDelimited;
         output.isMatrix = this.isMatrix;
         output.isAllowEmptyValue = this.isAllowEmptyValue;
         output.contentType = this.contentType;
@@ -282,6 +286,7 @@ public class CodegenParameter implements IJsonSchemaValidationProperties {
                 paramName, dataType, datatypeWithEnum, dataFormat, collectionFormat, description,
                 unescapedDescription, baseType, containerType, containerTypeMapped, defaultValue,
                 enumDefaultValue, enumName, style, isDeepObject, isMatrix, isAllowEmptyValue, example, examples,
+                isFormStyle, isSpaceDelimited, isPipeDelimited,
                 jsonSchema, isString, isNumeric, isInteger, isLong, isNumber, isFloat, isDouble, isDecimal,
                 isByteArray, isBinary, isBoolean, isDate, isDateTime, isUuid, isUri, isEmail, isPassword,
                 isFreeFormObject, isAnyType, isArray, isMap, isOptional, isFile, isEnum, isEnumRef, _enum, allowableValues,
@@ -375,6 +380,9 @@ public class CodegenParameter implements IJsonSchemaValidationProperties {
                 Objects.equals(enumName, that.enumName) &&
                 Objects.equals(style, that.style) &&
                 Objects.equals(isDeepObject, that.isDeepObject) &&
+                Objects.equals(isFormStyle, that.isFormStyle) &&
+                Objects.equals(isSpaceDelimited, that.isSpaceDelimited) &&
+                Objects.equals(isPipeDelimited, that.isPipeDelimited) &&
                 Objects.equals(isMatrix, that.isMatrix) &&
                 Objects.equals(isAllowEmptyValue, that.isAllowEmptyValue) &&
                 Objects.equals(example, that.example) &&
@@ -440,6 +448,9 @@ public class CodegenParameter implements IJsonSchemaValidationProperties {
         sb.append(", enumName='").append(enumName).append('\'');
         sb.append(", style='").append(style).append('\'');
         sb.append(", deepObject='").append(isDeepObject).append('\'');
+        sb.append(", isFormStyle='").append(isFormStyle).append('\'');
+        sb.append(", isSpaceDelimited='").append(isSpaceDelimited).append('\'');
+        sb.append(", isPipeDelimited='").append(isPipeDelimited).append('\'');
         sb.append(", isMatrix='").append(isMatrix).append('\'');
         sb.append(", allowEmptyValue='").append(isAllowEmptyValue).append('\'');
         sb.append(", example='").append(example).append('\'');

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

@@ -2135,6 +2135,9 @@ public class DefaultCodegen implements CodegenConfig {
                 }
 
                 codegenParameter.style = style.toString();
+                codegenParameter.isFormStyle = Encoding.StyleEnum.FORM == style;
+                codegenParameter.isSpaceDelimited = Encoding.StyleEnum.SPACE_DELIMITED == style;
+                codegenParameter.isPipeDelimited = Encoding.StyleEnum.PIPE_DELIMITED == style;
                 codegenParameter.isDeepObject = Encoding.StyleEnum.DEEP_OBJECT == style;
 
                 if (codegenParameter.isContainer) {
@@ -5398,6 +5401,9 @@ public class DefaultCodegen implements CodegenConfig {
         if (parameter.getStyle() != null) {
             codegenParameter.style = parameter.getStyle().toString();
             codegenParameter.isDeepObject = Parameter.StyleEnum.DEEPOBJECT == parameter.getStyle();
+            codegenParameter.isFormStyle = Parameter.StyleEnum.FORM == parameter.getStyle();
+            codegenParameter.isSpaceDelimited = Parameter.StyleEnum.SPACEDELIMITED == parameter.getStyle();
+            codegenParameter.isPipeDelimited = Parameter.StyleEnum.PIPEDELIMITED == parameter.getStyle();
             codegenParameter.isMatrix = Parameter.StyleEnum.MATRIX == parameter.getStyle();
         }
 

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

@@ -626,6 +626,22 @@ public class DefaultGenerator implements Generator {
         }
     }
 
+    /**
+     * this method splits the specified property by commas, trims any results for spaces and
+     * newlines, and returns them as a Set of Strings. the method will return an empty
+     * set if the specified property has not been set or is an empty string.
+     */
+    private Set<String> getPropertyAsSet(String propertyName) {
+        String propertyRaw = GlobalSettings.getProperty(propertyName);
+        if (propertyRaw == null || propertyRaw.isEmpty()) {
+            return Collections.emptySet();
+        }
+
+        return Arrays.stream(propertyRaw.split(","))
+            .map(String::trim)
+            .collect(Collectors.toSet());
+    }
+
     private Set<String> modelKeys() {
         final Map<String, Schema> schemas = ModelUtils.getSchemas(this.openAPI);
         if (schemas == null) {
@@ -633,12 +649,7 @@ public class DefaultGenerator implements Generator {
             return Collections.emptySet();
         }
 
-        String modelNames = GlobalSettings.getProperty("models");
-        Set<String> modelsToGenerate = null;
-        if (modelNames != null && !modelNames.isEmpty()) {
-            modelsToGenerate = new HashSet<>(Arrays.asList(modelNames.split(",")));
-        }
-
+        Set<String> modelsToGenerate = getPropertyAsSet(CodegenConstants.MODELS);
         Set<String> modelKeys = schemas.keySet();
         if (modelsToGenerate != null && !modelsToGenerate.isEmpty()) {
             Set<String> updatedKeys = new HashSet<>();
@@ -661,11 +672,7 @@ public class DefaultGenerator implements Generator {
             return;
         }
         Map<String, List<CodegenOperation>> paths = processPaths(this.openAPI.getPaths());
-        Set<String> apisToGenerate = null;
-        String apiNames = GlobalSettings.getProperty(CodegenConstants.APIS);
-        if (apiNames != null && !apiNames.isEmpty()) {
-            apisToGenerate = new HashSet<>(Arrays.asList(apiNames.split(",")));
-        }
+        Set<String> apisToGenerate = getPropertyAsSet(CodegenConstants.APIS);
         if (apisToGenerate != null && !apisToGenerate.isEmpty()) {
             Map<String, List<CodegenOperation>> updatedPaths = new TreeMap<>();
             for (String m : paths.keySet()) {
@@ -827,11 +834,7 @@ public class DefaultGenerator implements Generator {
             return;
         }
         Map<String, List<CodegenOperation>> webhooks = processWebhooks(this.openAPI.getWebhooks());
-        Set<String> webhooksToGenerate = null;
-        String webhookNames = GlobalSettings.getProperty(CodegenConstants.WEBHOOKS);
-        if (webhookNames != null && !webhookNames.isEmpty()) {
-            webhooksToGenerate = new HashSet<>(Arrays.asList(webhookNames.split(",")));
-        }
+        Set<String> webhooksToGenerate = getPropertyAsSet(CodegenConstants.WEBHOOKS);
         if (webhooksToGenerate != null && !webhooksToGenerate.isEmpty()) {
             Map<String, List<CodegenOperation>> Webhooks = new TreeMap<>();
             for (String m : webhooks.keySet()) {
@@ -1064,12 +1067,7 @@ public class DefaultGenerator implements Generator {
             return;
         }
 
-        Set<String> supportingFilesToGenerate = null;
-        String supportingFiles = GlobalSettings.getProperty(CodegenConstants.SUPPORTING_FILES);
-        if (supportingFiles != null && !supportingFiles.isEmpty()) {
-            supportingFilesToGenerate = new HashSet<>(Arrays.asList(supportingFiles.split(",")));
-        }
-
+        Set<String> supportingFilesToGenerate = getPropertyAsSet(CodegenConstants.SUPPORTING_FILES);
         for (SupportingFile support : config.supportingFiles()) {
             try {
                 String outputFolder = config.outputFolder();

modules/openapi-generator/src/main/java/org/openapitools/codegen/config/CodegenConfigurator.java

@@ -683,6 +683,7 @@ public class CodegenConfigurator {
         final List<AuthorizationValue> authorizationValues = AuthParser.parse(this.auth);
         ParseOptions options = new ParseOptions();
         options.setResolve(true);
+        options.setResolveResponses(true);
         SwaggerParseResult result = new OpenAPIParser().readLocation(inputSpec, authorizationValues, options);
 
         // TODO: Move custom validations to a separate type as part of a "Workflow"

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

@@ -751,6 +751,37 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen {
     protected void patchPropertyIsInherited(CodegenModel model, CodegenProperty property) {
     }
 
+    private void patchNestedMaps(CodegenProperty property) {
+        // Process nested types before making any replacements to ensure we have the correct inner type
+        if (property.items != null) {
+            patchNestedMaps(property.items);
+        }
+
+        String[] nestedTypes = {"List", "Collection", "ICollection", "Dictionary"};
+        
+        if (property.datatypeWithEnum != null) {
+            String originalType = property.datatypeWithEnum;
+            
+            for (String nestedType : nestedTypes) {
+                // fix incorrect data types for maps of maps
+                if (property.items != null) {
+                    if (property.datatypeWithEnum.contains(", " + nestedType + ">")) {
+                        property.datatypeWithEnum = property.datatypeWithEnum.replace(", " + nestedType + ">", ", " + property.items.datatypeWithEnum + ">");
+                    }
+
+                    if (property.datatypeWithEnum.contains("<" + nestedType + ">")) {
+                        property.datatypeWithEnum = property.datatypeWithEnum.replace("<" + nestedType + ">", "<" + property.items.datatypeWithEnum + ">");
+                    }
+                }
+            }
+
+            // Only update dataType if we actually made changes
+            if (!originalType.equals(property.datatypeWithEnum)) {
+                property.dataType = property.datatypeWithEnum;
+            }
+        }
+    }
+
     protected void patchProperty(Map<String, CodegenModel> enumRefs, CodegenModel model, CodegenProperty property) {
         if (enumRefs.containsKey(property.dataType)) {
             // Handle any enum properties referred to by $ref.
@@ -770,20 +801,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen {
 
         property.name = patchPropertyName(model, property.name, null);
 
-        String[] nestedTypes = {"List", "Collection", "ICollection", "Dictionary"};
-
-        Arrays.stream(nestedTypes).forEach(nestedType -> {
-            // fix incorrect data types for maps of maps
-            if (property.datatypeWithEnum.contains(", " + nestedType + ">") && property.items != null) {
-                property.datatypeWithEnum = property.datatypeWithEnum.replace(", " + nestedType + ">", ", " + property.items.datatypeWithEnum + ">");
-                property.dataType = property.datatypeWithEnum;
-            }
-
-            if (property.datatypeWithEnum.contains("<" + nestedType + ">") && property.items != null) {
-                property.datatypeWithEnum = property.datatypeWithEnum.replace("<" + nestedType + ">", "<" + property.items.datatypeWithEnum + ">");
-                property.dataType = property.datatypeWithEnum;
-            }
-        });
+        patchNestedMaps(property);
 
         // HOTFIX: https://github.com/OpenAPITools/openapi-generator/issues/14944
         if (property.datatypeWithEnum.equals("decimal")) {

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

@@ -22,6 +22,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Sets;
 import com.samskivert.mustache.Mustache;
 import io.swagger.v3.oas.models.OpenAPI;
@@ -50,6 +51,7 @@ import org.openapitools.codegen.model.ModelMap;
 import org.openapitools.codegen.model.ModelsMap;
 import org.openapitools.codegen.model.OperationMap;
 import org.openapitools.codegen.model.OperationsMap;
+import org.openapitools.codegen.templating.mustache.ReplaceAllLambda;
 import org.openapitools.codegen.utils.CamelizeOption;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;

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

@@ -0,0 +1,502 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openapitools.codegen.languages;
+
+import io.swagger.v3.oas.models.Operation;
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import io.swagger.v3.oas.models.responses.ApiResponse;
+import io.swagger.v3.oas.models.servers.Server;
+import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.*;
+import org.openapitools.codegen.meta.features.*;
+import org.openapitools.codegen.model.ModelMap;
+import org.openapitools.codegen.model.OperationMap;
+import org.openapitools.codegen.model.OperationsMap;
+import org.openapitools.codegen.utils.ModelUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.util.*;
+import java.util.function.Predicate;
+
+import static org.openapitools.codegen.utils.StringUtils.underscore;
+
+public class CppOatppServerCodegen extends AbstractCppCodegen {
+    private final Logger LOGGER = LoggerFactory.getLogger(CppOatppServerCodegen.class);
+
+    protected String implFolder = "impl";
+    protected boolean isAddExternalLibs = true;
+    public static final String OPTIONAL_EXTERNAL_LIB = "addExternalLibs";
+    public static final String OPTIONAL_EXTERNAL_LIB_DESC = "Add the Possibility to fetch and compile external Libraries needed by this Framework.";
+    protected final String PREFIX = "";
+
+    @Override
+    public CodegenType getTag() {
+        return CodegenType.SERVER;
+    }
+
+    @Override
+    public String getName() {
+        return "cpp-oatpp-server";
+    }
+
+    @Override
+    public String getHelp() {
+        return "Generates a C++ API server (based on Oat++)";
+    }
+
+    public CppOatppServerCodegen() {
+        super();
+
+        // TODO: cpp-oatpp-server maintainer review
+        modifyFeatureSet(features -> features
+                .includeDocumentationFeatures(DocumentationFeature.Readme)
+                .securityFeatures(EnumSet.noneOf(SecurityFeature.class))
+                .excludeGlobalFeatures(
+                        GlobalFeature.XMLStructureDefinitions,
+                        GlobalFeature.Callbacks,
+                        GlobalFeature.LinkObjects,
+                        GlobalFeature.ParameterStyling,
+                        GlobalFeature.MultiServer)
+                .excludeSchemaSupportFeatures(
+                        SchemaSupportFeature.Polymorphism)
+                .excludeParameterFeatures(
+                        ParameterFeature.Cookie));
+
+        if (StringUtils.isEmpty(modelNamePrefix)) {
+            modelNamePrefix = PREFIX;
+        }
+
+        apiPackage = "org.openapitools.server.api";
+        modelPackage = "org.openapitools.server.model";
+
+        apiTemplateFiles.put("api-header.mustache", ".hpp");
+        apiTemplateFiles.put("api-impl-header.mustache", ".hpp");
+        apiTemplateFiles.put("api-impl-source.mustache", ".cpp");
+
+        modelTemplateFiles.put("model-header.mustache", ".hpp");
+
+        embeddedTemplateDir = templateDir = "cpp-oatpp-server";
+
+        cliOptions.clear();
+        addSwitch(OPTIONAL_EXTERNAL_LIB, OPTIONAL_EXTERNAL_LIB_DESC, this.isAddExternalLibs);
+        addOption(RESERVED_WORD_PREFIX_OPTION, RESERVED_WORD_PREFIX_DESC, this.reservedWordPrefix);
+        addOption(VARIABLE_NAME_FIRST_CHARACTER_UPPERCASE_OPTION,
+                VARIABLE_NAME_FIRST_CHARACTER_UPPERCASE_DESC,
+                Boolean.toString(this.variableNameFirstCharacterUppercase));
+
+        setupSupportingFiles();
+
+        languageSpecificPrimitives = new HashSet<>(
+                Arrays.asList(
+                        "oatpp::String",
+                        "oatpp::Boolean",
+                        "oatpp::Int32",
+                        "oatpp::Int64",
+                        "oatpp::Vector",
+                        "oatpp::Fields",
+                        "oatpp::UnorderedSet",
+                        "oatpp::Object",
+                        "oatpp::Float64",
+                        "oatpp::Any"
+                ));
+
+        typeMapping = new HashMap<>();
+        typeMapping.put("date", "oatpp::String");
+        typeMapping.put("DateTime", "oatpp::String");
+        typeMapping.put("string", "oatpp::String");
+        typeMapping.put("integer", "oatpp::Int32");
+        typeMapping.put("long", "oatpp::Int64");
+        typeMapping.put("boolean", "oatpp::Boolean");
+        typeMapping.put("array", "oatpp::Vector");
+        typeMapping.put("map", "oatpp::Fields");
+        typeMapping.put("set", "oatpp::UnorderedSet");
+        typeMapping.put("file", "oatpp::String");
+        typeMapping.put("object", "oatpp::Object");
+        typeMapping.put("binary", "oatpp::String");
+        typeMapping.put("number", "oatpp::Float64");
+        typeMapping.put("UUID", "oatpp::String");
+        typeMapping.put("URI", "oatpp::String");
+        typeMapping.put("ByteArray", "oatpp::String");
+        typeMapping.put("AnyType", "oatpp::Any");
+
+        super.importMapping = new HashMap<>();
+    }
+
+    private void setupSupportingFiles() {
+        supportingFiles.clear();
+        supportingFiles
+                .add(new SupportingFile("main-api-server.mustache", "", modelNamePrefix + "main-api-server.cpp"));
+        supportingFiles.add(new SupportingFile("cmake.mustache", "", "CMakeLists.txt"));
+        supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
+    }
+
+    @Override
+    public void processOpts() {
+        super.processOpts();
+        if (additionalProperties.containsKey("modelNamePrefix")) {
+            additionalProperties().put("prefix", modelNamePrefix);
+            setupSupportingFiles();
+        }
+        if (additionalProperties.containsKey(RESERVED_WORD_PREFIX_OPTION)) {
+            reservedWordPrefix = (String) additionalProperties.get(RESERVED_WORD_PREFIX_OPTION);
+        }
+
+        additionalProperties.put("modelNamespaceDeclarations", modelPackage.split("\\."));
+        additionalProperties.put("modelNamespace", modelPackage.replaceAll("\\.", "::"));
+        additionalProperties.put("apiNamespaceDeclarations", apiPackage.split("\\."));
+        additionalProperties.put("apiNamespace", apiPackage.replaceAll("\\.", "::"));
+        additionalProperties.put(RESERVED_WORD_PREFIX_OPTION, reservedWordPrefix);
+
+        if (additionalProperties.containsKey(OPTIONAL_EXTERNAL_LIB)) {
+            setAddExternalLibs(convertPropertyToBooleanAndWriteBack(OPTIONAL_EXTERNAL_LIB));
+        } else {
+            additionalProperties.put(OPTIONAL_EXTERNAL_LIB, isAddExternalLibs);
+        }
+    }
+
+    @Override
+    public String toModelImport(String name) {
+        if (importMapping.containsKey(name)) {
+            return importMapping.get(name);
+        } else {
+            return "#include \"" + name + ".hpp\"";
+        }
+    }
+
+    @Override
+    public CodegenModel fromModel(String name, Schema model) {
+        CodegenModel codegenModel = super.fromModel(name, model);
+
+        Set<String> oldImports = codegenModel.imports;
+        codegenModel.imports = new HashSet<>();
+        for (String imp : oldImports) {
+            String newImp = toModelImport(imp);
+            if (!newImp.isEmpty()) {
+                codegenModel.imports.add(newImp);
+            }
+        }
+
+        if (!codegenModel.isEnum
+                && codegenModel.anyOf.size() > 1
+                && codegenModel.anyOf.contains("std::string")
+                && !codegenModel.anyOf.contains("AnyType")
+                && codegenModel.interfaces.size() == 1) {
+            codegenModel.vendorExtensions.put("x-is-string-enum-container", true);
+        }
+        return codegenModel;
+    }
+
+    @Override
+    public CodegenOperation fromOperation(String path, String httpMethod, Operation operation, List<Server> servers) {
+        CodegenOperation op = super.fromOperation(path, httpMethod, operation, servers);
+
+        if (operation.getResponses() != null && !operation.getResponses().isEmpty()) {
+            ApiResponse apiResponse = findMethodResponse(operation.getResponses());
+
+            if (apiResponse != null) {
+                Schema response = ModelUtils.getSchemaFromResponse(openAPI, apiResponse);
+                if (response != null) {
+                    CodegenProperty cm = fromProperty("response", response, false);
+                    op.vendorExtensions.put("x-codegen-response", cm);
+                    if ("HttpContent".equals(cm.dataType)) {
+                        op.vendorExtensions.put("x-codegen-response-ishttpcontent", true);
+                    }
+                }
+            }
+        }
+
+        String pathForOatpp = path.replaceAll("\\{(.*?)}", "{$1}");
+        op.vendorExtensions.put("x-codegen-oatpp-path", pathForOatpp);
+
+        return op;
+    }
+
+    @Override
+    public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List<ModelMap> allModels) {
+        OperationMap operations = objs.getOperations();
+        String classname = operations.getClassname();
+        operations.put("classnameSnakeUpperCase", underscore(classname).toUpperCase(Locale.ROOT));
+        operations.put("classnameSnakeLowerCase", underscore(classname).toLowerCase(Locale.ROOT));
+        List<CodegenOperation> operationList = operations.getOperation();
+        for (CodegenOperation op : operationList) {
+            postProcessSingleOperation(operations, op);
+        }
+
+        return objs;
+    }
+
+    private void postProcessSingleOperation(OperationMap operations, CodegenOperation op) {
+        if (op.vendorExtensions == null) {
+            op.vendorExtensions = new HashMap<>();
+        }
+
+        if (op.bodyParam != null) {
+            if (op.bodyParam.vendorExtensions == null) {
+                op.bodyParam.vendorExtensions = new HashMap<>();
+            }
+
+            boolean isStringOrDate = op.bodyParam.isString || op.bodyParam.isDate;
+            op.bodyParam.vendorExtensions.put("x-codegen-oatpp-is-string-or-date", isStringOrDate);
+        }
+
+        boolean consumeJson = false;
+        if (op.consumes != null) {
+            Predicate<Map<String, String>> isMediaTypeJson = consume -> (consume.get("mediaType") != null
+                    && consume.get("mediaType").equals("application/json"));
+            consumeJson = op.consumes.stream().anyMatch(isMediaTypeJson);
+        }
+        op.vendorExtensions.put("x-codegen-oatpp-consumes-json", consumeJson);
+
+        // Check if any one of the operations needs a model, then at API file level, at
+        // least one model has to be included.
+        Predicate<String> importNotInImportMapping = hdr -> !importMapping.containsKey(hdr);
+        if (op.imports.stream().anyMatch(importNotInImportMapping)) {
+            operations.put("hasModelImport", true);
+        }
+    }
+
+    /**
+     * postProcessSingleParam - Modifies a single parameter, adjusting generated
+     * data types for Header and Query parameters.
+     *
+     * @param param CodegenParameter to be modified.
+     */
+    private static void postProcessSingleParam(CodegenParameter param) {
+        if (param.isQueryParam) {
+            param.dataType = "std::optional<" + param.dataType + ">";
+            if (!param.isPrimitiveType) {
+                param.baseType = "std::optional<" + param.baseType + ">";
+            }
+        }
+    }
+
+    @Override
+    public String toModelFilename(String name) {
+        return toModelName(name);
+    }
+
+    @Override
+    public String apiFilename(String templateName, String tag) {
+        String result = super.apiFilename(templateName, tag);
+
+        if (templateName.endsWith("impl-header.mustache")) {
+            result = implFilenameFromApiFilename(result, ".hpp");
+        } else if (templateName.endsWith("impl-source.mustache")) {
+            result = implFilenameFromApiFilename(result, ".cpp");
+        }
+        return result;
+    }
+
+    /**
+     * implFilenameFromApiFilename - Inserts the string "Controller" in front of the
+     * suffix and replace "api" with "impl" directory prefix.
+     *
+     * @param filename Filename of the api-file to be modified
+     * @param suffix   Suffix of the file (usually ".cpp" or ".hpp")
+     * @return a filename string of impl file.
+     */
+    private String implFilenameFromApiFilename(String filename, String suffix) {
+        String result = filename.substring(0, filename.length() - suffix.length()) + "Controller" + suffix;
+        result = result.replace(apiFileFolder(), implFileFolder());
+        return result;
+    }
+
+    @Override
+    public String toApiFilename(String name) {
+        return toApiName(name);
+    }
+
+    /**
+     * Optional - type declaration. This is a String which is used by the
+     * templates to instantiate your types. There is typically special handling
+     * for different property types
+     *
+     * @return a string value used as the `dataType` field for model templates,
+     *         `returnType` for api templates
+     */
+    @Override
+    public String getTypeDeclaration(Schema p) {
+        String openAPIType = getSchemaType(p);
+
+        if (ModelUtils.isArraySchema(p)) {
+            ArraySchema ap = (ArraySchema) p;
+            Schema inner = ap.getItems();
+            if (languageSpecificPrimitives.contains(getSchemaType(inner))) {
+                return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
+            }
+            return getSchemaType(p) + "<oatpp::Object<" + getTypeDeclaration(inner) + ">>";
+        }
+        if (ModelUtils.isMapSchema(p)) {
+            Schema inner = ModelUtils.getAdditionalProperties(p);
+            return getSchemaType(p) + "<std::string, " + getTypeDeclaration(inner) + ">";
+        } else if (ModelUtils.isByteArraySchema(p)) {
+            return "std::string";
+        }
+        if (ModelUtils.isStringSchema(p)
+                || ModelUtils.isDateSchema(p)
+                || ModelUtils.isDateTimeSchema(p) || ModelUtils.isFileSchema(p)
+                || languageSpecificPrimitives.contains(openAPIType)) {
+            return toModelName(openAPIType);
+        }
+
+        String namespace = (String) additionalProperties.get("modelNamespace");
+        return namespace + "::" + openAPIType;
+    }
+
+    @Override
+    public String toDefaultValue(Schema p) {
+        if (ModelUtils.isStringSchema(p)) {
+            if (p.getDefault() != null) {
+                return "\"" + p.getDefault().toString() + "\"";
+            } else {
+                return "\"\"";
+            }
+        } else if (ModelUtils.isBooleanSchema(p)) {
+            if (p.getDefault() != null) {
+                return p.getDefault().toString();
+            } else {
+                return "false";
+            }
+        } else if (ModelUtils.isDateSchema(p)) {
+            if (p.getDefault() != null) {
+                return "\"" + p.getDefault().toString() + "\"";
+            } else {
+                return "\"\"";
+            }
+        } else if (ModelUtils.isDateTimeSchema(p)) {
+            if (p.getDefault() != null) {
+                return "\"" + p.getDefault().toString() + "\"";
+            } else {
+                return "\"\"";
+            }
+        } else if (ModelUtils.isNumberSchema(p)) {
+            if (ModelUtils.isFloatSchema(p)) { // float
+                if (p.getDefault() != null) {
+                    // We have to ensure that our default value has a decimal point,
+                    // because in C++ the 'f' suffix is not valid on integer literals
+                    // i.e. 374.0f is a valid float but 374 isn't.
+                    String defaultStr = p.getDefault().toString();
+                    if (defaultStr.indexOf('.') < 0) {
+                        return defaultStr + ".0f";
+                    } else {
+                        return defaultStr + "f";
+                    }
+                } else {
+                    return "0.0f";
+                }
+            } else { // double
+                if (p.getDefault() != null) {
+                    return p.getDefault().toString();
+                } else {
+                    return "0.0";
+                }
+            }
+        } else if (ModelUtils.isIntegerSchema(p)) {
+            if (ModelUtils.isLongSchema(p)) { // long
+                if (p.getDefault() != null) {
+                    return p.getDefault().toString() + "L";
+                } else {
+                    return "0L";
+                }
+            } else { // integer
+                if (p.getDefault() != null) {
+                    return p.getDefault().toString();
+                } else {
+                    return "0";
+                }
+            }
+        } else if (ModelUtils.isByteArraySchema(p)) {
+            if (p.getDefault() != null) {
+                return "\"" + p.getDefault().toString() + "\"";
+            } else {
+                return "\"\"";
+            }
+        } else if (ModelUtils.isMapSchema(p)) {
+            String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
+            return "std::map<std::string, " + inner + ">()";
+        } else if (ModelUtils.isArraySchema(p)) {
+            ArraySchema ap = (ArraySchema) p;
+            String inner = getSchemaType(ap.getItems());
+            if (!languageSpecificPrimitives.contains(inner)) {
+                inner = "std::shared_ptr<" + inner + ">";
+            }
+            return "std::vector<" + inner + ">()";
+        } else if (!StringUtils.isEmpty(p.get$ref())) {
+            return "std::make_shared<" + toModelName(ModelUtils.getSimpleRef(p.get$ref())) + ">()";
+        }
+
+        return "nullptr";
+    }
+
+    /**
+     * Location to write model files. You can use the modelPackage() as defined
+     * when the class is instantiated
+     */
+    @Override
+    public String modelFileFolder() {
+        return (outputFolder + "/model").replace("/", File.separator);
+    }
+
+    /**
+     * Location to write api files. You can use the apiPackage() as defined when
+     * the class is instantiated
+     */
+    @Override
+    public String apiFileFolder() {
+        return (outputFolder + "/api").replace("/", File.separator);
+    }
+
+    private String implFileFolder() {
+        return (outputFolder + "/" + implFolder).replace("/", File.separator);
+    }
+
+    /**
+     * Optional - OpenAPI type conversion. This is used to map OpenAPI types in
+     * a `Schema` into either language specific types via `typeMapping` or
+     * into complex models if there is not a mapping.
+     *
+     * @return a string value of the type or complex model for this property
+     */
+    @Override
+    public String getSchemaType(Schema p) {
+        String openAPIType = super.getSchemaType(p);
+        String type = null;
+        if (typeMapping.containsKey(openAPIType)) {
+            type = typeMapping.get(openAPIType);
+        } else {
+            type = openAPIType;
+        }
+        return toModelName(type);
+    }
+
+    @Override
+    public String getTypeDeclaration(String str) {
+        return toModelName(str);
+    }
+
+    /**
+     * Specify whether external libraries will be added during the generation
+     *
+     * @param value the value to be set
+     */
+    public void setAddExternalLibs(boolean value) {
+        isAddExternalLibs = value;
+    }
+}

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

@@ -70,6 +70,8 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     public static final String CASE_INSENSITIVE_RESPONSE_HEADERS = "caseInsensitiveResponseHeaders";
     public static final String MICROPROFILE_FRAMEWORK = "microprofileFramework";
     public static final String MICROPROFILE_MUTINY = "microprofileMutiny";
+    public static final String MICROPROFILE_GLOBAL_EXCEPTION_MAPPER = "microprofileGlobalExceptionMapper";
+    public static final String MICROPROFILE_REGISTER_EXCEPTION_MAPPER = "microprofileRegisterExceptionMapper";
     public static final String USE_ABSTRACTION_FOR_FILES = "useAbstractionForFiles";
     public static final String DYNAMIC_OPERATIONS = "dynamicOperations";
     public static final String SUPPORT_STREAMING = "supportStreaming";
@@ -102,6 +104,12 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     public static final String USE_ENUM_CASE_INSENSITIVE = "useEnumCaseInsensitive";
     public static final String FAIL_ON_UNKNOWN_PROPERTIES = "failOnUnknownProperties";
     public static final String SUPPORT_VERTX_FUTURE = "supportVertxFuture";
+    public static final String USE_SEALED_ONE_OF_INTERFACES = "useSealedOneOfInterfaces";
+
+    // Internal configurations
+    public static final String SINGLE_REQUEST_PARAMETER = "singleRequestParameter";
+    public static final String STATIC_REQUEST = "staticRequest";
+    public static final String JAVA_17 = "java17";
 
     public static final String SERIALIZATION_LIBRARY_GSON = "gson";
     public static final String SERIALIZATION_LIBRARY_JACKSON = "jackson";
@@ -120,6 +128,8 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     @Setter protected String microprofileFramework = MICROPROFILE_DEFAULT;
     @Setter protected String microprofileRestClientVersion = MICROPROFILE_REST_CLIENT_DEFAULT_VERSION;
     @Setter protected boolean microprofileMutiny = false;
+    @Setter protected boolean microProfileGlobalExceptionMapper = true;
+    @Setter protected boolean microProfileRegisterExceptionMapper = true;
     @Setter protected String configKey = null;
     @Setter(AccessLevel.PRIVATE) protected boolean configKeyFromClassName = false;
 
@@ -138,6 +148,7 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     @Setter protected String errorObjectType;
     @Getter @Setter protected boolean failOnUnknownProperties = false;
     @Setter protected boolean supportVertxFuture = false;
+    @Setter protected boolean useSealedOneOfInterfaces = false;
     protected String authFolder;
     /**
      * Serialization library.
@@ -229,6 +240,8 @@ public class JavaClientCodegen extends AbstractJavaCodegen
         cliOptions.add(CliOption.newBoolean(CASE_INSENSITIVE_RESPONSE_HEADERS, "Make API response's headers case-insensitive. Available on " + OKHTTP_GSON + ", " + JERSEY2 + " libraries"));
         cliOptions.add(CliOption.newString(MICROPROFILE_FRAMEWORK, "Framework for microprofile. Possible values \"kumuluzee\""));
         cliOptions.add(CliOption.newString(MICROPROFILE_MUTINY, "Whether to use async types for microprofile (currently only Smallrye Mutiny is supported)."));
+        cliOptions.add(CliOption.newString(MICROPROFILE_REGISTER_EXCEPTION_MAPPER, "Should generated API Clients be annotated with @RegisterProvider(ApiExceptionMapper.class).").defaultValue("true"));
+        cliOptions.add(CliOption.newString(MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, "Should ApiExceptionMapper be annotated with @Provider making it a global exception mapper").defaultValue("true"));
         cliOptions.add(CliOption.newBoolean(USE_ABSTRACTION_FOR_FILES, "Use alternative types instead of java.io.File to allow passing bytes without a file on disk. Available on resttemplate, webclient, restclient, libraries"));
         cliOptions.add(CliOption.newBoolean(DYNAMIC_OPERATIONS, "Generate operations dynamically at runtime from an OAS", this.dynamicOperations));
         cliOptions.add(CliOption.newBoolean(SUPPORT_STREAMING, "Support streaming endpoint (beta)", this.supportStreaming));
@@ -246,6 +259,7 @@ public class JavaClientCodegen extends AbstractJavaCodegen
         cliOptions.add(CliOption.newBoolean(USE_ENUM_CASE_INSENSITIVE, "Use `equalsIgnoreCase` when String for enum comparison", useEnumCaseInsensitive));
         cliOptions.add(CliOption.newBoolean(FAIL_ON_UNKNOWN_PROPERTIES, "Fail Jackson de-serialization on unknown properties", this.failOnUnknownProperties));
         cliOptions.add(CliOption.newBoolean(SUPPORT_VERTX_FUTURE, "Also generate api methods that return a vertx Future instead of taking a callback. Only `vertx` supports this option. Requires vertx 4 or greater.", this.supportVertxFuture));
+        cliOptions.add(CliOption.newBoolean(USE_SEALED_ONE_OF_INTERFACES, "Generate the oneOf interfaces as sealed interfaces. Only supported for WebClient and RestClient.", this.useSealedOneOfInterfaces));
 
         supportedLibraries.put(JERSEY2, "HTTP client: Jersey client 2.25.1. JSON processing: Jackson 2.17.1");
         supportedLibraries.put(JERSEY3, "HTTP client: Jersey client 3.1.1. JSON processing: Jackson 2.17.1");
@@ -361,8 +375,13 @@ public class JavaClientCodegen extends AbstractJavaCodegen
             convertPropertyToBooleanAndWriteBack(USE_RX_JAVA2, this::setUseRxJava2);
         }
         convertPropertyToStringAndWriteBack(CodegenConstants.USE_SINGLE_REQUEST_PARAMETER, this::setUseSingleRequestParameter);
-        writePropertyBack("singleRequestParameter", getSingleRequestParameter());
-        writePropertyBack("staticRequest", getStaticRequest());
+        convertPropertyToBooleanAndWriteBack(USE_SEALED_ONE_OF_INTERFACES, this::setUseSealedOneOfInterfaces);
+        writePropertyBack(SINGLE_REQUEST_PARAMETER, getSingleRequestParameter());
+        writePropertyBack(STATIC_REQUEST, getStaticRequest());
+
+        if (libWebClient && (useSealedOneOfInterfaces || useJakartaEe)) {
+            writePropertyBack(JAVA_17, true);
+        }
 
         if (!useRxJava && !useRxJava2 && !useRxJava3) {
             additionalProperties.put(DO_NOT_USE_RX, true);
@@ -380,6 +399,12 @@ public class JavaClientCodegen extends AbstractJavaCodegen
         }
         convertPropertyToStringAndWriteBack(MICROPROFILE_FRAMEWORK, this::setMicroprofileFramework);
 
+        convertPropertyToBooleanAndWriteBack(MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, this::setMicroProfileGlobalExceptionMapper);
+        convertPropertyToBooleanAndWriteBack(MICROPROFILE_REGISTER_EXCEPTION_MAPPER, this::setMicroProfileRegisterExceptionMapper);
+
+        additionalProperties.put(MICROPROFILE_REGISTER_EXCEPTION_MAPPER, microProfileRegisterExceptionMapper);
+        additionalProperties.put(MICROPROFILE_GLOBAL_EXCEPTION_MAPPER, microProfileGlobalExceptionMapper);
+
         convertPropertyToBooleanAndWriteBack(MICROPROFILE_MUTINY, this::setMicroprofileMutiny);
 
         convertPropertyToStringAndWriteBack(MICROPROFILE_REST_CLIENT_VERSION, value -> microprofileRestClientVersion = value);

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

@@ -20,6 +20,7 @@ import com.google.common.collect.ImmutableMap;
 import com.samskivert.mustache.Mustache;
 import com.samskivert.mustache.Mustache.Lambda;
 import com.samskivert.mustache.Template;
+import io.swagger.v3.oas.models.Components;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import lombok.Getter;
@@ -33,6 +34,7 @@ import org.openapitools.codegen.model.ModelMap;
 import org.openapitools.codegen.model.ModelsMap;
 import org.openapitools.codegen.model.OperationMap;
 import org.openapitools.codegen.model.OperationsMap;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.openapitools.codegen.utils.URLPathUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -768,6 +770,11 @@ public class KotlinSpringServerCodegen extends AbstractKotlinCodegen
     public void preprocessOpenAPI(OpenAPI openAPI) {
         super.preprocessOpenAPI(openAPI);
 
+        if (SPRING_BOOT.equals(library) && ModelUtils.containsEnums(this.openAPI)) {
+            supportingFiles.add(new SupportingFile("converter.mustache",
+                (sourceFolder + File.separator + configPackage).replace(".", java.io.File.separator), "EnumConverterConfiguration.kt"));
+        }
+
         if (!additionalProperties.containsKey(TITLE)) {
             // The purpose of the title is for:
             // - README documentation

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

@@ -1105,14 +1105,17 @@ public class ProtobufSchemaCodegen extends DefaultCodegen implements CodegenConf
                 addtionalPropertiesName = schema.getTitle();
             } else {
                 Schema additionalProperties = ModelUtils.getAdditionalProperties(schema);
-                if (additionalProperties.getTitle() != null) {
+                if(additionalProperties == null) {
+                   return; 
+                } else if (additionalProperties.getTitle() != null) {
                     addtionalPropertiesName = additionalProperties.getTitle();
                 } else if (additionalProperties.get$ref() != null) {
                     String ref = ModelUtils.getSimpleRef(additionalProperties.get$ref());
                     addtionalPropertiesName = toVarName(toModelName(ref));
                 }
             }
-            properties.put(addtionalPropertiesName, schema);
+            
+            properties.put(addtionalPropertiesName, schema);        
         }
     }
 }

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

@@ -61,6 +61,9 @@ public class RustAxumServerCodegen extends AbstractRustCodegen implements Codege
     private Boolean allowBlockingValidator = false;
     private Boolean allowBlockingResponseSerialize = false;
     private String externCrateName;
+    private Boolean basicAuthorization = false;
+    private Boolean basicAnalytic = false;
+    private Boolean ownedRequest = false;
 
     // Types
     private static final String uuidType = "uuid::Uuid";
@@ -286,7 +289,7 @@ public class RustAxumServerCodegen extends AbstractRustCodegen implements Codege
             LOGGER.info("Warning: Environment variable 'RUST_POST_PROCESS_FILE' is set but file post-processing is not enabled. To enable file post-processing, 'enablePostProcessFile' must be set to `true` (--enable-post-process-file for CLI).");
         }
 
-        if (!Boolean.TRUE.equals(ModelUtils.isGenerateAliasAsModel())) {
+        if (!ModelUtils.isGenerateAliasAsModel()) {
             LOGGER.warn("generateAliasAsModel is set to false, which means array/map will be generated as model instead and the resulting code may have issues. Please enable `generateAliasAsModel` to address the issue.");
         }
 
@@ -316,6 +319,24 @@ public class RustAxumServerCodegen extends AbstractRustCodegen implements Codege
         } else {
             additionalProperties.put("allowBlockingResponseSerialize", allowBlockingResponseSerialize);
         }
+
+        if (additionalProperties.containsKey("basicAuthorization")) {
+            basicAuthorization = convertPropertyToBooleanAndWriteBack("basicAuthorization");
+        } else {
+            additionalProperties.put("basicAuthorization", basicAuthorization);
+        }
+
+        if (additionalProperties.containsKey("basicAnalytic")) {
+            basicAnalytic = convertPropertyToBooleanAndWriteBack("basicAnalytic");
+        } else {
+            additionalProperties.put("basicAnalytic", basicAnalytic);
+        }
+
+        if (additionalProperties.containsKey("ownedRequest")) {
+            ownedRequest = convertPropertyToBooleanAndWriteBack("ownedRequest");
+        } else {
+            additionalProperties.put("ownedRequest", ownedRequest);
+        }
     }
 
     private void setPackageName(String packageName) {
@@ -722,6 +743,21 @@ public class RustAxumServerCodegen extends AbstractRustCodegen implements Codege
             operations.put("havingAuthMethod", true);
             operations.getOperation().forEach(op -> op.vendorExtensions.put("havingAuthMethod", true));
             this.havingAuthMethods = true;
+
+            if (basicAuthorization) {
+                operations.put("basicAuthorization", true);
+                operations.getOperation().forEach(op -> op.vendorExtensions.put("basicAuthorization", true));
+            }
+        }
+
+        if (basicAnalytic) {
+            operations.put("basicAnalytic", true);
+            operations.getOperation().forEach(op -> op.vendorExtensions.put("basicAnalytic", true));
+        }
+
+        if (ownedRequest) {
+            operations.put("ownedRequest", true);
+            operations.getOperation().forEach(op -> op.vendorExtensions.put("ownedRequest", true));
         }
 
         return operationsMap;
@@ -982,6 +1018,22 @@ public class RustAxumServerCodegen extends AbstractRustCodegen implements Codege
             property.dataType = objectType;
             property.isNullable = false;
         }
+
+        if (property.dataType.startsWith(vecType + "<String")) {
+            property.vendorExtensions.put("is-vec-string", true);
+        } else if (property.dataType.startsWith(vecType + "<models::")) {
+            property.vendorExtensions.put("is-vec-nested", true);
+        } else if (property.dataType.startsWith(mapType + "<String, String")) {
+            property.vendorExtensions.put("is-map-string", true);
+        } else if (property.dataType.startsWith(mapType + "<String, models::")) {
+            property.vendorExtensions.put("is-map-nested", true);
+        } else if (property.dataType.startsWith(mapType + "<String")) {
+            property.vendorExtensions.put("is-map", true);
+        } else if (property.dataType.startsWith("models::")) {
+            property.vendorExtensions.put("is-nested", true);
+        } else if (stringType.equals(property.dataType)) {
+            property.vendorExtensions.put("is-string", true);
+        }
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ScalaHttp4sServerCodegen.java

@@ -16,10 +16,14 @@
 
 package org.openapitools.codegen.languages;
 
+import com.google.common.collect.ImmutableMap;
+import com.samskivert.mustache.Escapers;
+import com.samskivert.mustache.Mustache;
 import io.swagger.v3.oas.models.media.Schema;
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.meta.features.*;
 import org.openapitools.codegen.model.*;
+import org.openapitools.codegen.templating.mustache.EscapeKeywordLambda;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -140,7 +144,7 @@ public class ScalaHttp4sServerCodegen extends DefaultCodegen implements CodegenC
         additionalProperties.put("infoEmail", "team@openapitools.org");
         additionalProperties.put("licenseInfo", "Apache 2.0");
         additionalProperties.put("licenseUrl", "http://apache.org/licenses/LICENSE-2.0.html");
-
+        additionalProperties.put("fnEscapeBacktick", new EscapeBacktickLambda());
 
         languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList(
@@ -557,7 +561,12 @@ public class ScalaHttp4sServerCodegen extends DefaultCodegen implements CodegenC
 
     @Override
     public String escapeReservedWord(String name) {
-        return "_" + name;
+        if (this.reservedWordsMappings().containsKey(name)) {
+            return this.reservedWordsMappings().get(name);
+        }
+        // Reserved words will be further escaped at the mustache compiler level.
+        // Scala escaping done here (via `, without compiler escaping) would otherwise be HTML encoded.
+        return "`" + name + "`";
     }
 
     @Override
@@ -807,12 +816,12 @@ public class ScalaHttp4sServerCodegen extends DefaultCodegen implements CodegenC
 
         if (_vendorExtensions.size() == 1) { // only `x-type`
             if ("String".equals(cp.getDataType())) {
-                return cp.paramName;
+                return escapeReservedWordUnapply(cp.baseName);
             } else {
-                return cp.dataType + "Varr(" + cp.paramName + ")";
+                return cp.dataType + "Varr(" + escapeReservedWordUnapply(cp.baseName) + ")";
             }
         } else {
-            return cp.baseName + "Varr(" + cp.paramName + ")";
+            return cp.baseName + "Varr(" + escapeReservedWordUnapply(cp.baseName) + ")";
         }
     }
 
@@ -844,11 +853,34 @@ public class ScalaHttp4sServerCodegen extends DefaultCodegen implements CodegenC
         }
 
         vendorExtensions.putAll(refineProp(cp, imports));
-        return cp.baseName + "QueryParam(" + cp.paramName + ")";
+        return cp.baseName + "QueryParam(" + escapeReservedWordUnapply(cp.baseName) + ")";
     }
 
     @Override
     public GeneratorLanguage generatorLanguage() {
         return GeneratorLanguage.SCALA;
     }
+
+    @Override
+    protected ImmutableMap.Builder<String, Mustache.Lambda> addMustacheLambdas() {
+        return super.addMustacheLambdas()
+                .put("escapeReservedWordUnapply", new EscapeKeywordLambda(this::escapeReservedWordUnapply));
+    }
+
+    private String escapeReservedWordUnapply(String value) {
+        // The unapply method doesn’t allow you to work with reserved variables via backticks;
+        // in such cases you should use the variable via a placeholder instead.
+        return isReservedWord(value) ? "_" + value : value;
+    }
+
+    private static class EscapeBacktickLambda extends AbstractScalaCodegen.CustomLambda {
+        @Override
+        public String formatFragment(String fragment) {
+            if (fragment.startsWith("`") && fragment.endsWith("`")) {
+                String unescaped = fragment.substring(1, fragment.length() - 1);
+                return "`" + Escapers.HTML.escape(unescaped) + "`";
+            }
+            return Escapers.HTML.escape(fragment);
+        }
+    }
 }

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

@@ -18,7 +18,6 @@
 package org.openapitools.codegen.languages;
 
 import com.samskivert.mustache.Mustache;
-import io.swagger.v3.oas.models.Components;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.PathItem;
@@ -40,6 +39,7 @@ import org.openapitools.codegen.model.OperationsMap;
 import org.openapitools.codegen.templating.mustache.SplitStringLambda;
 import org.openapitools.codegen.templating.mustache.SpringHttpStatusLambda;
 import org.openapitools.codegen.templating.mustache.TrimWhitespaceLambda;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.openapitools.codegen.utils.ProcessUtils;
 import org.openapitools.codegen.utils.URLPathUtils;
 import org.slf4j.Logger;
@@ -648,20 +648,6 @@ public class SpringCodegen extends AbstractJavaCodegen
         supportsAdditionalPropertiesWithComposedSchema = true;
     }
 
-    private boolean containsEnums() {
-        if (openAPI == null) {
-            return false;
-        }
-
-        Components components = this.openAPI.getComponents();
-        if (components == null || components.getSchemas() == null) {
-            return false;
-        }
-
-        return components.getSchemas().values().stream()
-                .anyMatch(it -> it.getEnum() != null && !it.getEnum().isEmpty());
-    }
-
     private boolean supportLibraryUseTags() {
         return SPRING_BOOT.equals(library) || SPRING_CLOUD_LIBRARY.equals(library);
     }
@@ -696,7 +682,7 @@ public class SpringCodegen extends AbstractJavaCodegen
     public void preprocessOpenAPI(OpenAPI openAPI) {
         super.preprocessOpenAPI(openAPI);
 
-        if (SPRING_BOOT.equals(library) && containsEnums()) {
+        if (SPRING_BOOT.equals(library) && ModelUtils.containsEnums(this.openAPI)) {
             supportingFiles.add(new SupportingFile("converter.mustache",
                     (sourceFolder + File.separator + configPackage).replace(".", java.io.File.separator), "EnumConverterConfiguration.java"));
         }

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

@@ -84,7 +84,7 @@ public class TypeScriptAngularClientCodegen extends AbstractTypeScriptClientCode
     public static final String NGPACKAGR_VERSION = "ngPackagrVersion";
     public static final String ZONEJS_VERSION = "zonejsVersion";
 
-    protected String ngVersion = "19.0.0";
+    protected String ngVersion = "20.0.0";
     @Getter @Setter
     protected String npmRepository = null;
     @Setter(AccessLevel.PRIVATE) private boolean useSingleRequestParameter = false;
@@ -170,7 +170,7 @@ public class TypeScriptAngularClientCodegen extends AbstractTypeScriptClientCode
 
     @Override
     public String getHelp() {
-        return "Generates a TypeScript Angular (9.x - 19.x) client library.";
+        return "Generates a TypeScript Angular (9.x - 20.x) client library.";
     }
 
     @Override

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

@@ -78,6 +78,9 @@ public class TypeScriptClientCodegen extends AbstractTypeScriptClientCodegen imp
     private static final String USE_OBJECT_PARAMS_SWITCH = "useObjectParameters";
     private static final String USE_OBJECT_PARAMS_DESC = "Use aggregate parameter objects as function arguments for api operations instead of passing each parameter as a separate function argument.";
 
+    public static final String USE_ERASABLE_SYNTAX = "useErasableSyntax";
+    public static final String USE_ERASABLE_SYNTAX_DESC = "Use erasable syntax for the generated code. This is a temporary feature and will be removed in the future.";
+
     private final Map<String, String> frameworkToHttpLibMap;
 
     // NPM Options
@@ -122,6 +125,7 @@ public class TypeScriptClientCodegen extends AbstractTypeScriptClientCodegen imp
         cliOptions.add(new CliOption(TypeScriptClientCodegen.USE_OBJECT_PARAMS_SWITCH, TypeScriptClientCodegen.USE_OBJECT_PARAMS_DESC).defaultValue("false"));
         cliOptions.add(new CliOption(TypeScriptClientCodegen.USE_INVERSIFY_SWITCH, TypeScriptClientCodegen.USE_INVERSIFY_SWITCH_DESC).defaultValue("false"));
         cliOptions.add(new CliOption(TypeScriptClientCodegen.IMPORT_FILE_EXTENSION_SWITCH, TypeScriptClientCodegen.IMPORT_FILE_EXTENSION_SWITCH_DESC));
+        cliOptions.add(new CliOption(TypeScriptClientCodegen.USE_ERASABLE_SYNTAX, TypeScriptClientCodegen.USE_ERASABLE_SYNTAX_DESC).defaultValue("false"));
 
         CliOption frameworkOption = new CliOption(TypeScriptClientCodegen.FRAMEWORK_SWITCH, TypeScriptClientCodegen.FRAMEWORK_SWITCH_DESC);
         for (String option : TypeScriptClientCodegen.FRAMEWORKS) {

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

@@ -799,6 +799,11 @@ public class TypeScriptFetchClientCodegen extends AbstractTypeScriptClientCodege
                 .filter(Objects::nonNull)
                 .collect(Collectors.toCollection(TreeSet::new));
 
+        cm.oneOfPrimitives = oneOfsList.stream()
+                .filter(CodegenProperty::getIsPrimitiveType)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toCollection(HashSet::new));
+
         if (!cm.oneOf.isEmpty()) {
             // For oneOfs only import $refs within the oneOf
             cm.imports = cm.imports.stream()
@@ -1484,6 +1489,8 @@ public class TypeScriptFetchClientCodegen extends AbstractTypeScriptClientCodege
         public Set<String> oneOfModels = new TreeSet<>();
         @Getter @Setter
         public Set<String> oneOfArrays = new TreeSet<>();
+        @Getter @Setter
+        public Set<CodegenProperty> oneOfPrimitives = new HashSet<>();
 
         public boolean isEntity; // Is a model containing an "id" property marked as isUniqueId
         public String returnPassthrough;

modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java

@@ -2435,6 +2435,19 @@ public class ModelUtils {
                 schema.getContentSchema() != null);
     }
 
+    /**
+     * Returns true if the OpenAPI specification contains any schemas which are enums.
+     * @param openAPI   OpenAPI specification
+     * @return          true if the OpenAPI specification contains any schemas which are enums.
+     */
+    public static boolean containsEnums(OpenAPI openAPI) {
+        Map<String, Schema> schemaMap = getSchemas(openAPI);
+        if (schemaMap.isEmpty()) {
+            return false;
+        }
+
+        return schemaMap.values().stream().anyMatch(ModelUtils::isEnumSchema);
+    }
 
     @FunctionalInterface
     private interface OpenAPISchemaVisitor {

modules/openapi-generator/src/main/resources/C-libcurl/README.md.mustache

@@ -15,16 +15,16 @@ For more information, please visit [{{{infoUrl}}}]({{{infoUrl}}})
 {{/infoUrl}}
 
 ## Installation
-You'll need the `curl 7.58.0` package in order to build the API. To have code formatted nicely, you also need to have uncrustify version 0.67 or later.
+You'll need the `curl 7.61.1` package in order to build the API. To have code formatted nicely, you also need to have uncrustify version 0.67 or later.
 
 # Prerequisites
 
-## Install the `curl 7.58.0` package with the following command on Linux.
+## Install the `curl 7.61.1` package with the following command on Linux.
 ```bash
 sudo apt remove curl
-wget http://curl.haxx.se/download/curl-7.58.0.tar.gz
-tar -xvf curl-7.58.0.tar.gz
-cd curl-7.58.0/
+wget http://curl.haxx.se/download/curl-7.61.1.tar.gz
+tar -xvf curl-7.61.1.tar.gz
+cd curl-7.61.1/
 ./configure
 make
 sudo make install

modules/openapi-generator/src/main/resources/C-libcurl/apiClient.c.mustache

@@ -10,6 +10,7 @@ apiClient_t *apiClient_create() {
     apiClient_t *apiClient = malloc(sizeof(apiClient_t));
     apiClient->basePath = strdup("{{{basePath}}}");
     apiClient->sslConfig = NULL;
+    apiClient->curlConfig = NULL;
     apiClient->dataReceived = NULL;
     apiClient->dataReceivedLen = 0;
     apiClient->data_callback_func = NULL;
@@ -60,6 +61,12 @@ apiClient_t *apiClient_create_with_base_path(const char *basePath
         apiClient->sslConfig = NULL;
     }
 
+    apiClient->curlConfig = malloc(sizeof(curlConfig_t));
+    apiClient->curlConfig->verbose = 0;
+    apiClient->curlConfig->keepalive = 0;
+    apiClient->curlConfig->keepidle = 120;
+    apiClient->curlConfig->keepintvl = 60;
+
     apiClient->dataReceived = NULL;
     apiClient->dataReceivedLen = 0;
     apiClient->data_callback_func = NULL;
@@ -142,6 +149,12 @@ void apiClient_free(apiClient_t *apiClient) {
     {{/isApiKey}}
     {{/authMethods}}
     {{/hasAuthMethods}}
+
+    if(apiClient->curlConfig) {
+        free(apiClient->curlConfig);
+        apiClient->curlConfig = NULL;
+    }
+
     free(apiClient);
 }
 
@@ -498,7 +511,6 @@ void apiClient_invoke(apiClient_t    *apiClient,
                          CURLOPT_WRITEDATA,
                          apiClient);
         curl_easy_setopt(handle, CURLOPT_HTTPHEADER, headers);
-        curl_easy_setopt(handle, CURLOPT_VERBOSE, 0); // to get curl debug msg 0: to disable, 1L:to enable
 
         {{#hasAuthMethods}}
         {{#authMethods}}
@@ -543,6 +555,15 @@ void apiClient_invoke(apiClient_t    *apiClient,
             postData(handle, bodyParameters, bodyParametersLength);
         }
 
+        if(apiClient->curlConfig != NULL) {
+            if(apiClient->curlConfig->keepalive == 1) {
+                curl_easy_setopt(handle, CURLOPT_TCP_KEEPALIVE, 1L);
+                curl_easy_setopt(handle, CURLOPT_TCP_KEEPIDLE, apiClient->curlConfig->keepidle);
+                curl_easy_setopt(handle, CURLOPT_TCP_KEEPINTVL, apiClient->curlConfig->keepintvl);
+            }
+            curl_easy_setopt(handle, CURLOPT_VERBOSE, apiClient->curlConfig->verbose);
+        }
+
         res = curl_easy_perform(handle);
 
         curl_slist_free_all(headers);

modules/openapi-generator/src/main/resources/C-libcurl/apiClient.h.mustache

@@ -19,9 +19,19 @@ typedef struct sslConfig_t {
                                   /* 1 -- skip ssl verify for server certificate */
 } sslConfig_t;
 
+typedef struct curlConfig_t {
+    long verbose;   /* 0 -- disable verbose (default) */
+                    /* 1 -- enable verbose */
+    int keepalive;  /* 0 -- disable keepalive (default) */
+                    /* 1 -- enable keepalive */
+    long keepidle;  /* keep-alive idle time: default to 120 seconds */
+    long keepintvl; /* interval time between keep-alive probes: default to 60 seconds */
+} curlConfig_t;
+
 typedef struct apiClient_t {
     char *basePath;
     sslConfig_t *sslConfig;
+    curlConfig_t *curlConfig;
     void *dataReceived;
     long dataReceivedLen;
     void (*data_callback_func)(void **, long *);

modules/openapi-generator/src/main/resources/Java/ApiClient.mustache

@@ -535,7 +535,7 @@ public class ApiClient{{#jsr310}} extends JavaTimeFormatter{{/jsr310}} {
    * @param value The value of the parameter.
    * @return A list of {@code Pair} objects.
    */
-  public List<Pair> parameterToPairs(String collectionFormat, String name, Collection value) {
+  public List<Pair> parameterToPairs(String collectionFormat, String name, Collection<?> value) {
     List<Pair> params = new ArrayList<Pair>();
 
     // preconditions

modules/openapi-generator/src/main/resources/Java/RFC3339JavaTimeModule.mustache

@@ -6,6 +6,7 @@ import java.time.OffsetDateTime;
 import java.time.ZonedDateTime;
 
 import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.fasterxml.jackson.databind.Module.SetupContext;
 
 {{>generatedAnnotation}}
 
@@ -14,9 +15,15 @@ public class RFC3339JavaTimeModule extends SimpleModule {
 
     public RFC3339JavaTimeModule() {
         super("RFC3339JavaTimeModule");
-
-        addDeserializer(Instant.class, RFC3339InstantDeserializer.INSTANT);
-        addDeserializer(OffsetDateTime.class, RFC3339InstantDeserializer.OFFSET_DATE_TIME);
-        addDeserializer(ZonedDateTime.class, RFC3339InstantDeserializer.ZONED_DATE_TIME);
     }
+
+   @Override
+   public void setupModule(SetupContext context) {
+       super.setupModule(context);
+
+       addDeserializer(Instant.class, RFC3339InstantDeserializer.INSTANT);
+       addDeserializer(OffsetDateTime.class, RFC3339InstantDeserializer.OFFSET_DATE_TIME);
+       addDeserializer(ZonedDateTime.class, RFC3339InstantDeserializer.ZONED_DATE_TIME);
+   }
+
 }

modules/openapi-generator/src/main/resources/Java/libraries/microprofile/api.mustache

@@ -24,7 +24,9 @@ import {{rootJavaEEPackage}}.validation.constraints.*;
 import {{rootJavaEEPackage}}.validation.Valid;
 {{/useBeanValidation}}
 
+{{#microprofileRegisterExceptionMapper}}
 import org.eclipse.microprofile.rest.client.annotation.RegisterProvider;
+{{/microprofileRegisterExceptionMapper}}
 import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
 
 {{#appName}}
@@ -41,7 +43,9 @@ import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
 {{^microprofileServer}}
 @RegisterRestClient{{#configKey}}(configKey="{{configKey}}"){{/configKey}}{{#configKeyFromClassName}}{{#operations}}(configKey="{{configKey}}"){{/operations}}{{/configKeyFromClassName}}
 {{/microprofileServer}}
+{{#microprofileRegisterExceptionMapper}}
 @RegisterProvider(ApiExceptionMapper.class)
+{{/microprofileRegisterExceptionMapper}}
 @Path("{{#useAnnotatedBasePath}}{{contextPath}}{{/useAnnotatedBasePath}}{{commonPath}}")
 public interface {{classname}}  {
 {{#operations}}

modules/openapi-generator/src/main/resources/Java/libraries/microprofile/api_exception_mapper.mustache

@@ -3,10 +3,14 @@ package {{apiPackage}};
 
 import {{rootJavaEEPackage}}.ws.rs.core.MultivaluedMap;
 import {{rootJavaEEPackage}}.ws.rs.core.Response;
+{{#microprofileGlobalExceptionMapper}}
 import {{rootJavaEEPackage}}.ws.rs.ext.Provider;
+{{/microprofileGlobalExceptionMapper}}
 import org.eclipse.microprofile.rest.client.ext.ResponseExceptionMapper;
 
+{{#microprofileGlobalExceptionMapper}}
 @Provider
+{{/microprofileGlobalExceptionMapper}}
 public class ApiExceptionMapper
     implements ResponseExceptionMapper<ApiException> {
 

modules/openapi-generator/src/main/resources/Java/libraries/microprofile/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/Java/libraries/native/ApiClient.mustache

@@ -158,7 +158,7 @@ public class ApiClient {
   public ApiClient() {
     this.builder = createDefaultHttpClientBuilder();
     this.mapper = createDefaultObjectMapper();
-    updateBaseUri(getDefaultBaseUri());
+    updateBaseUri("{{{basePath}}}");
     interceptor = null;
     readTimeout = null;
     connectTimeout = null;
@@ -176,7 +176,7 @@ public class ApiClient {
   public ApiClient(HttpClient.Builder builder, ObjectMapper mapper, String baseUri) {
     this.builder = builder;
     this.mapper = mapper;
-    updateBaseUri(baseUri != null ? baseUri : getDefaultBaseUri());
+    updateBaseUri(baseUri != null ? baseUri : "{{{basePath}}}");
     interceptor = null;
     readTimeout = null;
     connectTimeout = null;
@@ -201,8 +201,8 @@ public class ApiClient {
     return mapper;
   }
 
-  protected String getDefaultBaseUri() {
-    return "{{{basePath}}}";
+  protected final String getDefaultBaseUri() {
+    return basePath;
   }
 
   public static HttpClient.Builder createDefaultHttpClientBuilder() {

modules/openapi-generator/src/main/resources/Java/libraries/native/api.mustache

@@ -57,6 +57,26 @@ import java.util.concurrent.CompletableFuture;
 
 {{#operations}}
 public class {{classname}} {
+  /**
+   * Utility class for extending HttpRequest.Builder functionality.
+   */
+  private static class HttpRequestBuilderExtensions {
+    /**
+     * Adds additional headers to the provided HttpRequest.Builder. Useful for adding method/endpoint specific headers.
+     *
+     * @param builder the HttpRequest.Builder to which headers will be added
+     * @param headers a map of header names and values to add; may be null
+     * @return the same HttpRequest.Builder instance with the additional headers set
+     */
+    static HttpRequest.Builder withAdditionalHeaders(HttpRequest.Builder builder, Map<String, String> headers) {
+        if (headers != null) {
+            for (Map.Entry<String, String> entry : headers.entrySet()) {
+                builder.header(entry.getKey(), entry.getValue());
+            }
+        }
+        return builder;
+    }
+  }
   private final HttpClient memberVarHttpClient;
   private final ObjectMapper memberVarObjectMapper;
   private final String memberVarBaseUri;
@@ -78,6 +98,7 @@ public class {{classname}} {
     memberVarResponseInterceptor = apiClient.getResponseInterceptor();
     memberVarAsyncResponseInterceptor = apiClient.getAsyncResponseInterceptor();
   }
+
   {{#asyncNative}}
 
   private ApiException getApiException(String operationId, HttpResponse<String> response) {
@@ -177,11 +198,40 @@ public class {{classname}} {
   @Deprecated
   {{/isDeprecated}}
   public {{#returnType}}{{#asyncNative}}CompletableFuture<{{{returnType}}}>{{/asyncNative}}{{^asyncNative}}{{{returnType}}}{{/asyncNative}}{{/returnType}}{{^returnType}}{{#asyncNative}}CompletableFuture<Void>{{/asyncNative}}{{^asyncNative}}void{{/asyncNative}}{{/returnType}} {{operationId}}(API{{#lambda.titlecase}}{{operationId}}{{/lambda.titlecase}}Request apiRequest) throws ApiException {
+    {{#returnType}}return {{/returnType}}{{^returnType}}{{#asyncNative}}return {{/asyncNative}}{{/returnType}}{{operationId}}(apiRequest, null);
+  }
+
+  /**
+   * {{summary}}
+   * {{notes}}
+   * @param apiRequest {@link API{{#lambda.titlecase}}{{operationId}}{{/lambda.titlecase}}Request}
+   * @param headers Optional headers to include in the request
+   {{#returnType}}
+   * @return {{#asyncNative}}CompletableFuture&lt;{{/asyncNative}}{{returnType}}{{#asyncNative}}&gt;{{/asyncNative}}
+   {{/returnType}}
+   {{^returnType}}
+   {{#asyncNative}}
+   * @return CompletableFuture&lt;Void&gt;
+   {{/asyncNative}}
+   {{/returnType}}
+   * @throws ApiException if fails to make API call
+   {{#isDeprecated}}
+   * @deprecated
+   {{/isDeprecated}}
+   {{#externalDocs}}
+   * {{description}}
+   * @see <a href="{{url}}">{{summary}} Documentation</a>
+   {{/externalDocs}}
+   */
+  {{#isDeprecated}}
+  @Deprecated
+  {{/isDeprecated}}
+  public {{#returnType}}{{#asyncNative}}CompletableFuture<{{{returnType}}}>{{/asyncNative}}{{^asyncNative}}{{{returnType}}}{{/asyncNative}}{{/returnType}}{{^returnType}}{{#asyncNative}}CompletableFuture<Void>{{/asyncNative}}{{^asyncNative}}void{{/asyncNative}}{{/returnType}} {{operationId}}(API{{#lambda.titlecase}}{{operationId}}{{/lambda.titlecase}}Request apiRequest, Map<String, String> headers) throws ApiException {
     {{#allParams}}
     {{>nullable_var_annotations}}{{! prevent indent}}
     {{{dataType}}} {{paramName}} = apiRequest.{{paramName}}();
     {{/allParams}}
-    {{#returnType}}return {{/returnType}}{{^returnType}}{{#asyncNative}}return {{/asyncNative}}{{/returnType}}{{operationId}}({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}});
+    {{#returnType}}return {{/returnType}}{{^returnType}}{{#asyncNative}}return {{/asyncNative}}{{/returnType}}{{operationId}}({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}headers);
   }
 
   /**
@@ -202,10 +252,32 @@ public class {{classname}} {
   @Deprecated
   {{/isDeprecated}}
   public {{#asyncNative}}CompletableFuture<{{/asyncNative}}ApiResponse<{{{returnType}}}{{^returnType}}Void{{/returnType}}>{{#asyncNative}}>{{/asyncNative}} {{operationId}}WithHttpInfo(API{{#lambda.titlecase}}{{operationId}}{{/lambda.titlecase}}Request apiRequest) throws ApiException {
+    return {{operationId}}WithHttpInfo(apiRequest, null);
+  }
+
+  /**
+   * {{summary}}
+   * {{notes}}
+   * @param apiRequest {@link API{{#lambda.titlecase}}{{operationId}}{{/lambda.titlecase}}Request}
+   * @param headers Optional headers to include in the request
+   * @return {{#asyncNative}}CompletableFuture&lt;{{/asyncNative}}ApiResponse&lt;{{returnType}}{{^returnType}}Void{{/returnType}}&gt;{{#asyncNative}}&gt;{{/asyncNative}}
+   * @throws ApiException if fails to make API call
+   {{#isDeprecated}}
+   * @deprecated
+   {{/isDeprecated}}
+   {{#externalDocs}}
+   * {{description}}
+   * @see <a href="{{url}}">{{summary}} Documentation</a>
+   {{/externalDocs}}
+   */
+  {{#isDeprecated}}
+  @Deprecated
+  {{/isDeprecated}}
+  public {{#asyncNative}}CompletableFuture<{{/asyncNative}}ApiResponse<{{{returnType}}}{{^returnType}}Void{{/returnType}}>{{#asyncNative}}>{{/asyncNative}} {{operationId}}WithHttpInfo(API{{#lambda.titlecase}}{{operationId}}{{/lambda.titlecase}}Request apiRequest, Map<String, String> headers) throws ApiException {
     {{#allParams}}
     {{{dataType}}} {{paramName}} = apiRequest.{{paramName}}();
     {{/allParams}}
-    return {{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}});
+    return {{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}headers);
   }
 
   {{/hasParams}}
@@ -237,15 +309,46 @@ public class {{classname}} {
   @Deprecated
   {{/isDeprecated}}
   public {{#returnType}}{{#asyncNative}}CompletableFuture<{{{returnType}}}>{{/asyncNative}}{{^asyncNative}}{{{returnType}}}{{/asyncNative}}{{/returnType}}{{^returnType}}{{#asyncNative}}CompletableFuture<Void>{{/asyncNative}}{{^asyncNative}}void{{/asyncNative}}{{/returnType}} {{operationId}}({{#allParams}}{{>nullable_var_annotations}} {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}) throws ApiException {
+    {{#returnType}}return {{/returnType}}{{^returnType}}{{#asyncNative}}return {{/asyncNative}}{{/returnType}}{{operationId}}({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}null);
+  }
+
+  /**
+   * {{summary}}
+   * {{notes}}
+   {{#allParams}}
+   * @param {{paramName}} {{description}}{{#required}} (required){{/required}}{{^required}} (optional{{^isContainer}}{{#defaultValue}}, default to {{.}}{{/defaultValue}}{{/isContainer}}){{/required}}
+   {{/allParams}}
+   * @param headers Optional headers to include in the request
+   {{#returnType}}
+   * @return {{#asyncNative}}CompletableFuture&lt;{{/asyncNative}}{{returnType}}{{#asyncNative}}&gt;{{/asyncNative}}
+   {{/returnType}}
+   {{^returnType}}
+   {{#asyncNative}}
+   * @return CompletableFuture&lt;Void&gt;
+   {{/asyncNative}}
+   {{/returnType}}
+   * @throws ApiException if fails to make API call
+   {{#isDeprecated}}
+   * @deprecated
+   {{/isDeprecated}}
+   {{#externalDocs}}
+   * {{description}}
+   * @see <a href="{{url}}">{{summary}} Documentation</a>
+   {{/externalDocs}}
+   */
+  {{#isDeprecated}}
+  @Deprecated
+  {{/isDeprecated}}
+  public {{#returnType}}{{#asyncNative}}CompletableFuture<{{{returnType}}}>{{/asyncNative}}{{^asyncNative}}{{{returnType}}}{{/asyncNative}}{{/returnType}}{{^returnType}}{{#asyncNative}}CompletableFuture<Void>{{/asyncNative}}{{^asyncNative}}void{{/asyncNative}}{{/returnType}} {{operationId}}({{#allParams}}{{>nullable_var_annotations}} {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}Map<String, String> headers) throws ApiException {
     {{^asyncNative}}
-    {{#returnType}}ApiResponse<{{{.}}}> localVarResponse = {{/returnType}}{{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}});
+    {{#returnType}}ApiResponse<{{{.}}}> localVarResponse = {{/returnType}}{{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}headers);
     {{#returnType}}
     return localVarResponse.getData();
     {{/returnType}}
     {{/asyncNative}}
     {{#asyncNative}}
     try {
-      HttpRequest.Builder localVarRequestBuilder = {{operationId}}RequestBuilder({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}});
+      HttpRequest.Builder localVarRequestBuilder = {{operationId}}RequestBuilder({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}headers);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -293,8 +396,32 @@ public class {{classname}} {
   @Deprecated
   {{/isDeprecated}}
   public {{#asyncNative}}CompletableFuture<{{/asyncNative}}ApiResponse<{{{returnType}}}{{^returnType}}Void{{/returnType}}>{{#asyncNative}}>{{/asyncNative}} {{operationId}}WithHttpInfo({{#allParams}}{{>nullable_var_annotations}} {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}) throws ApiException {
+    return {{operationId}}WithHttpInfo({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}null);
+  }
+
+  /**
+   * {{summary}}
+   * {{notes}}
+   {{#allParams}}
+   * @param {{paramName}} {{description}}{{#required}} (required){{/required}}{{^required}} (optional{{^isContainer}}{{#defaultValue}}, default to {{.}}{{/defaultValue}}{{/isContainer}}){{/required}}
+   {{/allParams}}
+   * @param headers Optional headers to include in the request
+   * @return {{#asyncNative}}CompletableFuture&lt;{{/asyncNative}}ApiResponse&lt;{{returnType}}{{^returnType}}Void{{/returnType}}&gt;{{#asyncNative}}&gt;{{/asyncNative}}
+   * @throws ApiException if fails to make API call
+   {{#isDeprecated}}
+   * @deprecated
+   {{/isDeprecated}}
+   {{#externalDocs}}
+   * {{description}}
+   * @see <a href="{{url}}">{{summary}} Documentation</a>
+   {{/externalDocs}}
+   */
+  {{#isDeprecated}}
+  @Deprecated
+  {{/isDeprecated}}
+  public {{#asyncNative}}CompletableFuture<{{/asyncNative}}ApiResponse<{{{returnType}}}{{^returnType}}Void{{/returnType}}>{{#asyncNative}}>{{/asyncNative}} {{operationId}}WithHttpInfo({{#allParams}}{{>nullable_var_annotations}} {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}Map<String, String> headers) throws ApiException {
     {{^asyncNative}}
-    HttpRequest.Builder localVarRequestBuilder = {{operationId}}RequestBuilder({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}});
+    HttpRequest.Builder localVarRequestBuilder = {{operationId}}RequestBuilder({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}headers);
     try {
       HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
           localVarRequestBuilder.build(),
@@ -386,7 +513,7 @@ public class {{classname}} {
     {{/asyncNative}}
     {{#asyncNative}}
     try {
-      HttpRequest.Builder localVarRequestBuilder = {{operationId}}RequestBuilder({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}});
+      HttpRequest.Builder localVarRequestBuilder = {{operationId}}RequestBuilder({{#allParams}}{{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}headers);
       return memberVarHttpClient.sendAsync(
           localVarRequestBuilder.build(),
           HttpResponse.BodyHandlers.ofString()).thenComposeAsync(localVarResponse -> {
@@ -423,7 +550,7 @@ public class {{classname}} {
     {{/asyncNative}}
   }
 
-  private HttpRequest.Builder {{operationId}}RequestBuilder({{#allParams}}{{>nullable_var_annotations}} {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}) throws ApiException {
+  private HttpRequest.Builder {{operationId}}RequestBuilder({{#allParams}}{{>nullable_var_annotations}} {{{dataType}}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#hasParams}}, {{/hasParams}}Map<String, String> headers) throws ApiException {
     {{#allParams}}
     {{#required}}
     // verify the required parameter '{{paramName}}' is set
@@ -628,6 +755,8 @@ public class {{classname}} {
     if (memberVarReadTimeout != null) {
       localVarRequestBuilder.timeout(memberVarReadTimeout);
     }
+    // Add custom headers if provided
+    localVarRequestBuilder = HttpRequestBuilderExtensions.withAdditionalHeaders(localVarRequestBuilder, headers);
     if (memberVarInterceptor != null) {
       memberVarInterceptor.accept(localVarRequestBuilder);
     }

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache

@@ -909,7 +909,7 @@ public class ApiClient {
      * @param value The value of the parameter.
      * @return A list of {@code Pair} objects.
      */
-    public List<Pair> parameterToPairs(String collectionFormat, String name, Collection value) {
+    public List<Pair> parameterToPairs(String collectionFormat, String name, Collection<?> value) {
         List<Pair> params = new ArrayList<Pair>();
 
         // preconditions

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/anyof_model.mustache

@@ -81,7 +81,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
                     {{^isPrimitiveType}}
                     {{#isArray}}
                         List<?> list = (List<?>) value.getActualInstance();
-                        if (list.get(0) instanceof {{{items.dataType}}}) {
+                        if (!list.isEmpty() && list.get(0) instanceof {{{items.dataType}}}) {
                             JsonArray array = adapter{{#sanitizeDataType}}{{{dataType}}}{{/sanitizeDataType}}.toJsonTree(({{{dataType}}})value.getActualInstance()).getAsJsonArray();
                             elementAdapter.write(out, array);
                             return;
@@ -252,7 +252,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
         if (instance instanceof {{#isArray}}List<?>{{/isArray}}{{^isArray}}{{{dataType}}}{{/isArray}}) {
         {{#isArray}}
             List<?> list = (List<?>) instance;
-            if (list.get(0) instanceof {{{items.dataType}}}) {
+            if (!list.isEmpty() && list.get(0) instanceof {{{items.dataType}}}) {
                 super.setActualInstance(instance);
                 return;
             }

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache

@@ -140,7 +140,7 @@ dependencies {
     {{#hasOAuthMethods}}
     implementation group: 'org.apache.oltu.oauth2', name: 'org.apache.oltu.oauth2.client', version: '1.0.2'
     {{/hasOAuthMethods}}
-    implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.17.0'
+    implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.18.0'
     {{#joda}}
     implementation 'joda-time:joda-time:2.9.9'
     {{/joda}}

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.sbt.mustache

@@ -13,7 +13,7 @@ lazy val root = (project in file(".")).
       "com.squareup.okhttp3" % "okhttp" % "4.12.0",
       "com.squareup.okhttp3" % "logging-interceptor" % "4.12.0",
       "com.google.code.gson" % "gson" % "2.9.1",
-      "org.apache.commons" % "commons-lang3" % "3.17.0",
+      "org.apache.commons" % "commons-lang3" % "3.18.0",
       "jakarta.ws.rs" % "jakarta.ws.rs-api" % "2.1.6",
       {{#openApiNullable}}
       "org.openapitools" % "jackson-databind-nullable" % "0.2.6",

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/oneof_model.mustache

@@ -94,7 +94,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
                     {{^isPrimitiveType}}
                     {{#isArray}}
                         List<?> list = (List<?>) value.getActualInstance();
-                        if (list.get(0) instanceof {{{items.dataType}}}) {
+                        if (!list.isEmpty() && list.get(0) instanceof {{{items.dataType}}}) {
                             JsonArray array = adapter{{#sanitizeDataType}}{{{dataType}}}{{/sanitizeDataType}}.toJsonTree(({{{dataType}}})value.getActualInstance()).getAsJsonArray();
                             elementAdapter.write(out, array);
                             return;
@@ -330,7 +330,7 @@ public class {{classname}} extends AbstractOpenApiSchema{{#vendorExtensions.x-im
         if (instance instanceof {{#isArray}}List<?>{{/isArray}}{{#isMap}}Map<?, ?>{{/isMap}}{{^isMap}}{{^isArray}}{{{dataType}}}{{/isArray}}{{/isMap}}) {
         {{#isArray}}
             List<?> list = (List<?>) instance;
-            if (list.get(0) instanceof {{{items.dataType}}}) {
+            if (!list.isEmpty() && list.get(0) instanceof {{{items.dataType}}}) {
                 super.setActualInstance(instance);
                 return;
             }

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/pom.mustache

@@ -414,7 +414,7 @@
         {{/swagger2AnnotationLibrary}}
         <okhttp-version>4.12.0</okhttp-version>
         <gson-version>2.10.1</gson-version>
-        <commons-lang3-version>3.17.0</commons-lang3-version>
+        <commons-lang3-version>3.18.0</commons-lang3-version>
         {{#openApiNullable}}
         <jackson-databind-nullable-version>0.2.6</jackson-databind-nullable-version>
         {{/openApiNullable}}

modules/openapi-generator/src/main/resources/Java/libraries/restclient/pojo.mustache

@@ -29,7 +29,7 @@
 {{#vendorExtensions.x-class-extra-annotation}}
 {{{vendorExtensions.x-class-extra-annotation}}}
 {{/vendorExtensions.x-class-extra-annotation}}
-public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtensions.x-implements}}{{#-first}}implements {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{#-last}} {{/-last}}{{/vendorExtensions.x-implements}}{
+public {{>sealed}}class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtensions.x-implements}}{{#-first}}implements {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{#-last}} {{/-last}}{{/vendorExtensions.x-implements}}{{>permits}}{
 {{#serializableModel}}
   private static final long serialVersionUID = 1L;
 

modules/openapi-generator/src/main/resources/Java/libraries/webclient/build.gradle.mustache

@@ -32,14 +32,14 @@ if(hasProperty('target') && target == 'android') {
         }
 
         compileOptions {
-            {{#useJakartaEe}}
+            {{#java17}}
             sourceCompatibility JavaVersion.VERSION_17
             targetCompatibility JavaVersion.VERSION_17
-            {{/useJakartaEe}}
-            {{^useJakartaEe}}
+            {{/java17}}
+            {{^java17}}
             sourceCompatibility JavaVersion.VERSION_1_8
             targetCompatibility JavaVersion.VERSION_1_8
-            {{/useJakartaEe}}
+            {{/java17}}
         }
 
         // Rename the aar correctly
@@ -84,14 +84,14 @@ if(hasProperty('target') && target == 'android') {
     apply plugin: 'java'
     apply plugin: 'maven-publish'
 
-    {{#useJakartaEe}}
+    {{#java17}}
     sourceCompatibility = JavaVersion.VERSION_17
     targetCompatibility = JavaVersion.VERSION_17
-    {{/useJakartaEe}}
-    {{^useJakartaEe}}
+    {{/java17}}
+    {{^java17}}
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
-    {{/useJakartaEe}}
+    {{/java17}}
 
     publishing {
         publications {
@@ -135,14 +135,14 @@ ext {
     jakarta_annotation_version = "2.1.1"
     beanvalidation_version = "3.0.2"
     reactor_version = "3.5.12"
-    reactor_netty_version = "1.1.13"
+    reactor_netty_version = "1.2.8"
     {{/useJakartaEe}}
     {{^useJakartaEe}}
     spring_boot_version = "2.7.17"
     jakarta_annotation_version = "1.3.5"
     beanvalidation_version = "2.0.2"
     reactor_version = "3.4.34"
-    reactor_netty_version = "1.0.39"
+    reactor_netty_version = "1.2.8"
     {{/useJakartaEe}}
     jackson_version = "2.17.1"
     jackson_databind_version = "2.17.1"

modules/openapi-generator/src/main/resources/Java/libraries/webclient/pojo.mustache

@@ -29,7 +29,7 @@
 {{#vendorExtensions.x-class-extra-annotation}}
 {{{vendorExtensions.x-class-extra-annotation}}}
 {{/vendorExtensions.x-class-extra-annotation}}
-public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtensions.x-implements}}{{#-first}}implements {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{#-last}} {{/-last}}{{/vendorExtensions.x-implements}}{
+public {{>sealed}}class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtensions.x-implements}}{{#-first}}implements {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{#-last}} {{/-last}}{{/vendorExtensions.x-implements}}{{>permits}}{
 {{#serializableModel}}
   private static final long serialVersionUID = 1L;
 

modules/openapi-generator/src/main/resources/Java/libraries/webclient/pom.mustache

@@ -45,14 +45,14 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.13.0</version>
                 <configuration>
-                {{#useJakartaEe}}
+                {{#java17}}
                     <source>17</source>
                     <target>17</target>
-                {{/useJakartaEe}}
-                {{^useJakartaEe}}
+                {{/java17}}
+                {{^java17}}
                     <source>1.8</source>
                     <target>1.8</target>
-                {{/useJakartaEe}}
+                {{/java17}}
                 </configuration>
             </plugin>
             <plugin>
@@ -176,13 +176,13 @@
         <spring-boot-version>3.0.12</spring-boot-version>
         <jakarta-annotation-version>2.1.1</jakarta-annotation-version>
         <reactor-version>3.5.12</reactor-version>
-        <reactor-netty-version>1.1.13</reactor-netty-version>
+        <reactor-netty-version>1.2.8</reactor-netty-version>
         {{/useJakartaEe}}
         {{^useJakartaEe}}
         <spring-boot-version>2.7.17</spring-boot-version>
         <jakarta-annotation-version>1.3.5</jakarta-annotation-version>
         <reactor-version>3.4.34</reactor-version>
-        <reactor-netty-version>1.0.39</reactor-netty-version>
+        <reactor-netty-version>1.2.8</reactor-netty-version>
         {{/useJakartaEe}}
         <junit-version>5.10.2</junit-version>
         {{#joda}}

modules/openapi-generator/src/main/resources/Java/oneof_interface.mustache

@@ -1,5 +1,5 @@
 {{>additionalOneOfTypeAnnotations}}{{>generatedAnnotation}}{{>typeInfoAnnotation}}{{>xmlAnnotation}}
-public interface {{classname}} {{#vendorExtensions.x-implements}}{{#-first}}extends {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{/vendorExtensions.x-implements}} {
+public {{>sealed}}interface {{classname}} {{#vendorExtensions.x-implements}}{{#-first}}extends {{{.}}}{{/-first}}{{^-first}}, {{{.}}}{{/-first}}{{/vendorExtensions.x-implements}}{{>permits}}{
     {{#discriminator}}
     public {{propertyType}} {{propertyGetter}}();
     {{/discriminator}}

modules/openapi-generator/src/main/resources/Java/permits.mustache

@@ -0,0 +1 @@
+{{#useSealedOneOfInterfaces}}{{#vendorExtensions.x-is-one-of-interface}}{{#permits}}{{#-first}}permits {{/-first}}{{{.}}}{{^-last}}, {{/-last}}{{#-last}} {{/-last}}{{/permits}}{{/vendorExtensions.x-is-one-of-interface}}{{/useSealedOneOfInterfaces}}

modules/openapi-generator/src/main/resources/Java/sealed.mustache

@@ -0,0 +1 @@
+{{#useSealedOneOfInterfaces}}{{#vendorExtensions.x-is-one-of-interface}}{{#permits.0}}sealed {{/permits.0}}{{/vendorExtensions.x-is-one-of-interface}}{{^permits.0}}{{#vendorExtensions.x-implements}}final {{/vendorExtensions.x-implements}}{{/permits.0}}{{/useSealedOneOfInterfaces}}

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf-ext/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/JavaSpring/api.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
  * https://openapi-generator.tech
  * Do not edit the class manually.
@@ -129,6 +129,7 @@ public interface {{classname}} {
 {{/jdk8-default-interface}}
 {{#operation}}
 
+    public static final String PATH_{{#lambda.uppercase}}{{#lambda.snakecase}}{{{operationId}}}{{/lambda.snakecase}}{{/lambda.uppercase}} = "{{{path}}}";
     /**
      * {{httpMethod}} {{{path}}}{{#summary}} : {{.}}{{/summary}}
     {{#notes}}
@@ -246,7 +247,7 @@ public interface {{classname}} {
     {{/implicitHeadersParams.0}}
     @RequestMapping(
         method = RequestMethod.{{httpMethod}},
-        value = "{{{path}}}"{{#singleContentTypes}}{{#hasProduces}},
+        value = {{classname}}.PATH_{{#lambda.uppercase}}{{#lambda.snakecase}}{{{operationId}}}{{/lambda.snakecase}}{{/lambda.uppercase}}{{#singleContentTypes}}{{#hasProduces}},
         produces = { {{#vendorExtensions.x-accepts}}"{{{.}}}"{{^-last}}, {{/-last}}{{/vendorExtensions.x-accepts}} }{{/hasProduces}}{{#hasConsumes}},
         consumes = "{{{vendorExtensions.x-content-type}}}"{{/hasConsumes}}{{/singleContentTypes}}{{^singleContentTypes}}{{#hasProduces}},
         produces = { {{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}} }{{/hasProduces}}{{#hasConsumes}},
@@ -274,7 +275,7 @@ public interface {{classname}} {
     }
 
     // Override this method
-    {{#jdk8-default-interface}}default {{/jdk8-default-interface}} {{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}{{#isArray}}List<MultipartFile>{{/isArray}}{{^isArray}}MultipartFile{{/isArray}}{{/reactive}}{{/isFile}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#reactive}}{{#hasParams}}, {{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}} final ServerWebExchange exchange{{/reactive}}{{#vendorExtensions.x-spring-paginated}}{{#hasParams}}, {{/hasParams}}{{^hasParams}}{{#reactive}}, {{/reactive}}{{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}}final Pageable pageable{{/vendorExtensions.x-spring-paginated}}){{#unhandledException}} throws Exception{{/unhandledException}} {
+    {{#jdk8-default-interface}}default {{/jdk8-default-interface}} {{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#reactive}}{{#isArray}}Flux<{{/isArray}}Part{{#isArray}}>{{/isArray}}{{/reactive}}{{^reactive}}{{#isArray}}List<{{/isArray}}MultipartFile{{#isArray}}>{{/isArray}}{{/reactive}}{{/isFile}} {{paramName}}{{^-last}}, {{/-last}}{{/allParams}}{{#reactive}}{{#hasParams}}, {{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}} final ServerWebExchange exchange{{/reactive}}{{#vendorExtensions.x-spring-paginated}}{{#hasParams}}, {{/hasParams}}{{^hasParams}}{{#reactive}}, {{/reactive}}{{/hasParams}}{{#springFoxDocumentationProvider}}@ApiIgnore{{/springFoxDocumentationProvider}}final Pageable pageable{{/vendorExtensions.x-spring-paginated}}){{#unhandledException}} throws Exception{{/unhandledException}} {
         {{/delegate-method}}
         {{^isDelegate}}
         {{>methodBody}}{{! prevent indent}}

modules/openapi-generator/src/main/resources/JavaSpring/apiDelegate.mustache

@@ -27,6 +27,9 @@ import java.util.Optional;
 {{#async}}
 import java.util.concurrent.CompletableFuture;
 {{/async}}
+{{#returnSuccessCode}}
+import java.util.concurrent.atomic.AtomicInteger;
+{{/returnSuccessCode}}
 import {{javaxPackage}}.annotation.Generated;
 
 {{#operations}}
@@ -68,7 +71,7 @@ public interface {{classname}}Delegate {
     {{#isDeprecated}}
     @Deprecated
     {{/isDeprecated}}
-    {{#jdk8-default-interface}}default {{/jdk8-default-interface}}{{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#isArray}}List<{{/isArray}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}{{#isFormParam}}MultipartFile{{/isFormParam}}{{^isFormParam}}{{>optionalDataType}}{{/isFormParam}}{{/reactive}}{{#isArray}}>{{/isArray}}{{/isFile}} {{paramName}}{{^-last}},
+    {{#jdk8-default-interface}}default {{/jdk8-default-interface}}{{>responseType}} {{operationId}}({{#allParams}}{{^isFile}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{#isBodyParam}}{{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}Mono<{{{dataType}}}>{{/isArray}}{{#isArray}}Flux<{{{baseType}}}>{{/isArray}}{{/reactive}}{{/isBodyParam}}{{/isFile}}{{#isFile}}{{#reactive}}{{#isArray}}Flux<{{/isArray}}Part{{#isArray}}>{{/isArray}}{{/reactive}}{{^reactive}}{{#isArray}}List<{{/isArray}}{{#isFormParam}}MultipartFile{{/isFormParam}}{{^isFormParam}}{{>optionalDataType}}{{/isFormParam}}{{#isArray}}>{{/isArray}}{{/reactive}}{{/isFile}} {{paramName}}{{^-last}},
         {{/-last}}{{/allParams}}{{#reactive}}{{#hasParams}},
         {{/hasParams}}ServerWebExchange exchange{{/reactive}}{{#vendorExtensions.x-spring-paginated}}{{#hasParams}}, {{/hasParams}}{{^hasParams}}{{#reactive}}, {{/reactive}}{{/hasParams}}final Pageable pageable{{/vendorExtensions.x-spring-paginated}}){{#unhandledException}} throws Exception{{/unhandledException}}{{^jdk8-default-interface}};{{/jdk8-default-interface}}{{#jdk8-default-interface}} {
         {{>methodBody}}{{! prevent indent}}

modules/openapi-generator/src/main/resources/JavaSpring/converter.mustache

@@ -12,6 +12,13 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.convert.converter.Converter;
 
+/**
+ * This class provides Spring Converter beans for the enum models in the OpenAPI specification.
+ *
+ * By default, Spring only converts primitive types to enums using Enum::valueOf, which can prevent
+ * correct conversion if the OpenAPI specification is using an `enumPropertyNaming` other than
+ * `original` or the specification has an integer enum.
+ */
 @Configuration(value = "{{configPackage}}.enumConverterConfiguration")
 public class EnumConverterConfiguration {
 

modules/openapi-generator/src/main/resources/JavaSpring/formParams.mustache

@@ -1 +1 @@
-{{#isFormParam}}{{^isFile}}{{>paramDoc}}{{#useBeanValidation}} @Valid{{/useBeanValidation}} {{#isModel}}@RequestPart{{/isModel}}{{^isModel}}{{#isArray}}@RequestPart{{/isArray}}{{^isArray}}{{#reactive}}@RequestPart{{/reactive}}{{^reactive}}@RequestParam{{/reactive}}{{/isArray}}{{/isModel}}(value = "{{baseName}}"{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}){{>dateTimeParam}} {{^required}}{{#useOptional}}Optional<{{/useOptional}}{{/required}}{{{dataType}}}{{^required}}{{#useOptional}}>{{/useOptional}}{{/required}} {{paramName}}{{/isFile}}{{#isFile}}{{>paramDoc}} @RequestPart(value = "{{baseName}}"{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}) {{#isArray}}List<{{/isArray}}{{#reactive}}Flux<Part>{{/reactive}}{{^reactive}}MultipartFile{{/reactive}}{{#isArray}}>{{/isArray}} {{paramName}}{{/isFile}}{{/isFormParam}}
+{{#isFormParam}}{{^isFile}}{{>paramDoc}}{{#useBeanValidation}} @Valid{{/useBeanValidation}} {{#isModel}}@RequestPart{{/isModel}}{{^isModel}}{{#isArray}}@RequestPart{{/isArray}}{{^isArray}}{{#reactive}}@RequestPart{{/reactive}}{{^reactive}}@RequestParam{{/reactive}}{{/isArray}}{{/isModel}}(value = "{{baseName}}"{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}){{>dateTimeParam}} {{^required}}{{#useOptional}}Optional<{{/useOptional}}{{/required}}{{{dataType}}}{{^required}}{{#useOptional}}>{{/useOptional}}{{/required}} {{paramName}}{{/isFile}}{{#isFile}}{{>paramDoc}} @RequestPart(value = "{{baseName}}"{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}) {{#reactive}}{{#isArray}}Flux<{{/isArray}}Part{{#isArray}}>{{/isArray}}{{/reactive}}{{^reactive}}{{#isArray}}List<{{/isArray}}MultipartFile{{#isArray}}>{{/isArray}}{{/reactive}} {{paramName}}{{/isFile}}{{/isFormParam}}

modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-http-interface/api.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
  * https://openapi-generator.tech
  * Do not edit the class manually.

modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-http-interface/httpInterfacesConfiguration.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/META-INF/services/org.openapitools.codegen.CodegenConfig

@@ -14,6 +14,7 @@ org.openapitools.codegen.languages.ClojureClientCodegen
 org.openapitools.codegen.languages.ConfluenceWikiCodegen
 org.openapitools.codegen.languages.CppQtClientCodegen
 org.openapitools.codegen.languages.CppQtQHttpEngineServerCodegen
+org.openapitools.codegen.languages.CppOatppServerCodegen
 org.openapitools.codegen.languages.CppPistacheServerCodegen
 org.openapitools.codegen.languages.CppRestbedServerCodegen
 org.openapitools.codegen.languages.CppRestbedServerDeprecatedCodegen

modules/openapi-generator/src/main/resources/android/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/cpp-oatpp-server/README.mustache

@@ -0,0 +1,46 @@
+# REST API Server for {{appName}}
+
+## Overview
+This API Server was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.
+It uses the [Oat++](https://github.com/oatpp/oatpp) Framework.
+
+## Files organization
+The Oat++ C++ REST server generator creates three folders:
+- `api`: This folder contains the handlers for each method specified in the OpenAPI definition. Every handler extracts
+the path and body parameters (if any) from the requests and tries to parse and possibly validate them.
+Once this step is completed, the main API class calls the corresponding abstract method that should be implemented
+by the developer (a basic implementation is provided under the `impl` folder)
+- `impl`: As written above, the implementation folder contains, for each API, the corresponding implementation class,
+which extends the main API class and implements the abstract methods.
+Every method receives the path and body parameters as constant reference variables and a reference to the response
+object, that should be filled with the right response and sent at the end of the method with the command:
+response.send(returnCode, responseBody, [mimeType])
+- `model`: This folder contains the corresponding class for every object schema found in the OpenAPI specification.
+
+The main folder contains also a file with a main that can be used to start the server.
+Of course, is you should customize this file based on your needs
+
+## Installation
+First of all, you need to download and install the libraries listed [here](#libraries-required).
+
+Once the libraries are installed, in order to compile and run the server please follow the steps below:
+```bash
+mkdir build
+cd build
+cmake ..
+make
+```
+
+Once compiled run the server:
+
+```bash
+cd build
+./api-server
+```
+
+## Libraries required
+- [Oat++](https://oatpp.io/)
+
+## Namespaces
+{{{apiPackage}}}
+{{{modelPackage}}}

modules/openapi-generator/src/main/resources/cpp-oatpp-server/api-header.mustache

@@ -0,0 +1,58 @@
+{{>licenseInfo}}
+{{#operations}}/*
+ * {{classname}}.h
+ *
+ * {{description}}
+ */
+
+#ifndef {{classname}}_H_
+#define {{classname}}_H_
+
+{{{defaultInclude}}}
+
+#include "oatpp/web/server/api/ApiController.hpp"
+#include "oatpp/core/macro/codegen.hpp"
+#include "oatpp/core/macro/component.hpp"
+#include "oatpp/core/Types.hpp"
+
+{{#imports}}{{{import}}}
+{{/imports}}
+
+#include OATPP_CODEGEN_BEGIN(ApiController) ///< Begin ApiController codegen section
+
+namespace {{apiNamespace}}
+{
+
+class {{classname}} : public oatpp::web::server::api::ApiController {
+public:
+
+  {{classname}}(OATPP_COMPONENT(std::shared_ptr<ObjectMapper>, objectMapper) /* Inject object mapper */)
+    : oatpp::web::server::api::ApiController(objectMapper) 
+  {}
+
+  {{#operation}}
+  /// <summary>
+  /// {{summary}}
+  /// </summary>
+  /// <remarks>
+  /// {{notes}}
+  /// </remarks>
+  /// <param name="request">HTTP Request</param>
+  {{#allParams}}
+  {{#isPathParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isPathParam}}{{#isQueryParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isQueryParam}}{{#isBodyParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isBodyParam}}{{#isHeaderParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isHeaderParam}}
+  {{/allParams}}
+  virtual std::shared_ptr<oatpp::web::protocol::http::outgoing::Response> {{operationIdSnakeCase}}(const std::shared_ptr<IncomingRequest> &request{{#allParams}}{{#isPathParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isPathParam}}{{#isQueryParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isQueryParam}}{{#isBodyParam}}, const {{#isModel}}oatpp::Object<{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}>{{/isModel}}{{^isModel}}{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}{{/isModel}} &{{paramName}}{{/isBodyParam}}{{#isHeaderParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isHeaderParam}}{{/allParams}}) = 0;
+
+  ENDPOINT("{{httpMethod}}", "{{{vendorExtensions.x-codegen-oatpp-path}}}", {{operationIdSnakeCase}}_handler, REQUEST(std::shared_ptr<IncomingRequest>, request){{#allParams}}{{#isPathParam}}, PATH({{#isModel}}{{modelNamespace}}::{{/isModel}}{{&dataType}}, {{paramName}}){{/isPathParam}}{{#isQueryParam}}, QUERY({{#isModel}}{{modelNamespace}}::{{/isModel}}{{&dataType}}, {{paramName}}){{/isQueryParam}}{{#isBodyParam}}, BODY_DTO({{#isModel}}oatpp::Object<{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}>{{/isModel}}{{^isModel}}{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}{{/isModel}}, {{paramName}}){{/isBodyParam}}{{#isHeaderParam}}, HEADER({{{dataType}}}, {{paramName}}, "{{paramName}}"){{/isHeaderParam}}{{/allParams}}) {
+      return {{operationIdSnakeCase}}(request{{#allParams}}{{#isPathParam}}, {{paramName}}{{/isPathParam}}{{#isQueryParam}}, {{paramName}}{{/isQueryParam}}{{#isBodyParam}}, {{paramName}}{{/isBodyParam}}{{#isHeaderParam}}, {{paramName}}{{/isHeaderParam}}{{/allParams}});
+  }
+  {{/operation}}
+};
+
+#include OATPP_CODEGEN_END(ApiController) ///< End ApiController codegen section
+
+} // namespace {{apiNamespace}}
+
+#endif /* {{classname}}_H_ */
+
+{{/operations}}

modules/openapi-generator/src/main/resources/cpp-oatpp-server/api-impl-header.mustache

@@ -0,0 +1,45 @@
+{{>licenseInfo}}
+
+{{#operations}}/*
+* {{classname}}Controller.hpp
+*
+* {{description}}
+*/
+
+#ifndef {{classnameSnakeUpperCase}}_IMPL_H_
+#define {{classnameSnakeUpperCase}}_IMPL_H_
+
+{{{defaultInclude}}}
+#include <{{classname}}.hpp>
+#include "oatpp/core/Types.hpp"
+
+
+{{#imports}}{{{import}}}
+{{/imports}}
+
+namespace {{apiNamespace}}
+{
+
+class {{declspec}} {{classname}}Controller : public {{classname}} {
+public:
+    {{#operation}}
+    /// <summary>
+    /// {{summary}}
+    /// </summary>
+    /// <remarks>
+    /// {{notes}}
+    /// </remarks>
+    /// <param name="request">HTTP Request</param>
+    {{#allParams}}
+    {{#isPathParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isPathParam}}{{#isQueryParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isQueryParam}}{{#isBodyParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isBodyParam}}{{#isHeaderParam}}/// <param name="{{paramName}}">{{description}}{{^required}} (optional{{#defaultValue}}, default to {{.}}{{/defaultValue}}){{/required}}</param>{{/isHeaderParam}}
+    {{/allParams}}
+    virtual std::shared_ptr<oatpp::web::protocol::http::outgoing::Response> {{operationIdSnakeCase}}(const std::shared_ptr<IncomingRequest> &request{{#allParams}}{{#isPathParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isPathParam}}{{#isQueryParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isQueryParam}}{{#isBodyParam}}, const {{#isModel}}oatpp::Object<{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}>{{/isModel}}{{^isModel}}{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}{{/isModel}} &{{paramName}}{{/isBodyParam}}{{#isHeaderParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isHeaderParam}}{{/allParams}});
+    {{/operation}}
+};
+
+} // namespace {{apiNamespace}}
+
+{{/operations}}
+
+
+#endif

modules/openapi-generator/src/main/resources/cpp-oatpp-server/api-impl-source.mustache

@@ -0,0 +1,27 @@
+{{>licenseInfo}}
+{{#operations}}
+
+#include "{{classname}}Controller.hpp"
+
+{{#apiNamespaceDeclarations}}
+namespace {{this}} {
+{{/apiNamespaceDeclarations}}
+
+{{#operation}}
+std::shared_ptr<oatpp::web::protocol::http::outgoing::Response> {{classname}}Controller::{{operationIdSnakeCase}}(const std::shared_ptr<IncomingRequest> &request{{#allParams}}{{#isPathParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isPathParam}}{{#isQueryParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isQueryParam}}{{#isBodyParam}}, const {{#isModel}}oatpp::Object<{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}>{{/isModel}}{{^isModel}}{{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}}{{/isModel}} &{{paramName}}{{/isBodyParam}}{{#isHeaderParam}}, const {{#isModel}}{{modelNamespace}}::{{/isModel}}{{{dataType}}} &{{paramName}}{{/isHeaderParam}}{{/allParams}}) {
+    (void)request;
+    {{#allParams}}
+    {{#isPathParam}}(void){{paramName}};{{/isPathParam}}
+    {{#isQueryParam}}(void){{paramName}};{{/isQueryParam}}
+    {{#isBodyParam}}(void){{paramName}};{{/isBodyParam}}
+    {{#isHeaderParam}}(void){{paramName}};{{/isHeaderParam}}
+    {{/allParams}}
+    return createResponse(Status::CODE_501, "TODO: Implement API Handler");
+}
+{{/operation}}
+
+{{#apiNamespaceDeclarations}}
+}
+{{/apiNamespaceDeclarations}}
+
+{{/operations}}

modules/openapi-generator/src/main/resources/cpp-oatpp-server/cmake.mustache

@@ -0,0 +1,38 @@
+cmake_minimum_required (VERSION 3.2)
+
+project(api-server)
+
+{{#addExternalLibs}}
+include(ExternalProject)
+
+set(EXTERNAL_INSTALL_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/external)
+
+ExternalProject_Add(OATPP
+    GIT_REPOSITORY https://github.com/oatpp/oatpp.git
+    BUILD_IN_SOURCE true
+    GIT_TAG 1.3.1
+    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXTERNAL_INSTALL_LOCATION}
+)
+
+include_directories(${EXTERNAL_INSTALL_LOCATION}/include/oatpp-1.3.0/oatpp)
+{{/addExternalLibs}}
+
+include_directories(model)
+include_directories(api)
+include_directories(impl)
+
+file(GLOB SRCS
+    ${CMAKE_CURRENT_SOURCE_DIR}/impl/*.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp
+)
+
+add_executable(${PROJECT_NAME} ${SRCS})
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
+
+{{#addExternalLibs}}add_dependencies(${PROJECT_NAME} OATPP)
+if(WIN32)
+target_link_libraries(${PROJECT_NAME} ${EXTERNAL_INSTALL_LOCATION}/lib/oatpp-1.3.0/oatpp.lib)
+target_link_libraries(${PROJECT_NAME} ws2_32)
+else()
+target_link_libraries(${PROJECT_NAME} ${EXTERNAL_INSTALL_LOCATION}/lib/oatpp-1.3.0/liboatpp.a)
+endif(WIN32){{/addExternalLibs}}

modules/openapi-generator/src/main/resources/cpp-oatpp-server/licenseInfo.mustache

@@ -0,0 +1,11 @@
+/**
+* {{{appName}}}
+* {{{appDescription}}}
+*
+* {{#version}}The version of the OpenAPI document: {{{.}}}{{/version}}
+* {{#infoEmail}}Contact: {{{.}}}{{/infoEmail}}
+*
+* NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+* https://openapi-generator.tech
+* Do not edit the class manually.
+*/

modules/openapi-generator/src/main/resources/cpp-oatpp-server/main-api-server.mustache

@@ -0,0 +1,95 @@
+{{>licenseInfo}}
+
+#include "oatpp/web/server/HttpConnectionHandler.hpp"
+
+#include "oatpp/network/Server.hpp"
+#include "oatpp/network/tcp/server/ConnectionProvider.hpp"
+#include "oatpp/parser/json/mapping/ObjectMapper.hpp"
+#include "oatpp/parser/json/Utils.hpp"
+
+
+{{#apiInfo}}{{#apis}}{{#operations}}
+#include "{{classname}}Controller.hpp"{{/operations}}{{/apis}}{{/apiInfo}}
+
+/**
+ *  Class which creates and holds Application components and registers components in oatpp::base::Environment
+ *  Order of components initialization is from top to bottom
+ */
+class AppComponent {
+public:
+
+  /**
+   *  Create ConnectionProvider component which listens on the port
+   */
+  OATPP_CREATE_COMPONENT(std::shared_ptr<oatpp::network::ServerConnectionProvider>, serverConnectionProvider)([] {
+    return oatpp::network::tcp::server::ConnectionProvider::createShared({"localhost", {{serverPort}}{{^serverPort}}8080{{/serverPort}}, oatpp::network::Address::IP_4});
+  }());
+
+  /**
+   *  Create Router component
+   */
+  OATPP_CREATE_COMPONENT(std::shared_ptr<oatpp::web::server::HttpRouter>, httpRouter)([] {
+    return oatpp::web::server::HttpRouter::createShared();
+  }());
+
+  /**
+   *  Create ConnectionHandler component which uses Router component to route requests
+   */
+  OATPP_CREATE_COMPONENT(std::shared_ptr<oatpp::network::ConnectionHandler>, serverConnectionHandler)([] {
+    OATPP_COMPONENT(std::shared_ptr<oatpp::web::server::HttpRouter>, router); // get Router component
+    return oatpp::web::server::HttpConnectionHandler::createShared(router);
+  }());
+
+  /**
+   *  Create ObjectMapper component to serialize/deserialize DTOs in Contoller's API
+   */
+  OATPP_CREATE_COMPONENT(std::shared_ptr<oatpp::data::mapping::ObjectMapper>, apiObjectMapper)([] {
+    return oatpp::parser::json::mapping::ObjectMapper::createShared();
+  }());
+
+};
+
+static int _main_app(void) {
+  /* Register Components in scope of run() method */
+  AppComponent components;
+
+  /* Get router component */
+  OATPP_COMPONENT(std::shared_ptr<oatpp::web::server::HttpRouter>, router);
+
+  {{#apiInfo}}{{#apis}}{{#operations}}
+  /* Create {{classname}}Controller and add all of its endpoints to router */
+  auto {{classname}}Controller = std::make_shared<{{apiNamespace}}::{{classname}}Controller>();
+  router->addController({{classname}}Controller);
+  {{/operations}}{{/apis}}{{/apiInfo}}
+
+
+  /* Get connection handler component */
+  OATPP_COMPONENT(std::shared_ptr<oatpp::network::ConnectionHandler>, connectionHandler);
+
+  /* Get connection provider component */
+  OATPP_COMPONENT(std::shared_ptr<oatpp::network::ServerConnectionProvider>, connectionProvider);
+
+  /* Create server which takes provided TCP connections and passes them to HTTP connection handler */
+  oatpp::network::Server server(connectionProvider, connectionHandler);
+
+
+  /* Print info about server port */
+  OATPP_LOGI("MyApp", "Server running on port %s", connectionProvider->getProperty("port").getData());
+
+  /* Run server */
+  server.run();
+
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  /* Init oatpp Environment */
+  oatpp::base::Environment::init();
+
+  int ret = _main_app();
+
+  /* Destroy oatpp Environment */
+  oatpp::base::Environment::destroy();
+
+  return ret;
+}

modules/openapi-generator/src/main/resources/cpp-oatpp-server/model-header.mustache

@@ -0,0 +1,61 @@
+{{>licenseInfo}}
+{{#models}}{{#model}}/*
+ * {{classname}}.h
+ *
+ * {{description}}
+ */
+
+#ifndef {{classname}}_H_
+#define {{classname}}_H_
+
+{{{defaultInclude}}}
+{{#imports}}{{{this}}}
+{{/imports}}
+{{^isEnum}}
+#include "oatpp/core/macro/codegen.hpp"
+{{/isEnum}}
+#include "oatpp/core/Types.hpp"
+
+namespace {{modelNamespace}}
+{
+
+{{^isEnum}}
+/* Begin DTO code-generation */
+#include OATPP_CODEGEN_BEGIN(DTO)
+
+/**
+ * Message Data-Transfer-Object
+ */
+class {{classname}} : public oatpp::DTO {
+
+  DTO_INIT({{classname}}, DTO /* Extends */)
+
+  {{#vars}}
+  DTO_FIELD({{#isModel}}oatpp::Object<{{{dataType}}}>{{/isModel}}{{^isModel}}{{{dataType}}}{{/isModel}}, {{baseName}});
+  {{^required}}
+  DTO_FIELD(oatpp::Boolean, {{baseName}}IsSet);{{/required}}
+  {{/vars}}
+
+};
+
+/* End DTO code-generation */
+#include OATPP_CODEGEN_END(DTO)
+{{/isEnum}}
+
+{{#isEnum}}
+typedef {{dataType}} {{classname}};
+class {{classname}}Values {
+public:
+{{#allowableValues}}
+{{#enumVars}}
+  static {{classname}} {{value}}(void) { return "{{value}}"; }
+{{/enumVars}}
+{{/allowableValues}}
+};
+{{/isEnum}}
+
+} // namespace {{modelNamespace}}
+
+#endif /* {{classname}}_H_ */
+{{/model}}
+{{/models}}

modules/openapi-generator/src/main/resources/dart/libraries/dio/serialization/built_value/class_members.mustache

@@ -32,7 +32,7 @@
 
   @BuiltValueHook(initializeBuilder: true)
   static void _defaults({{{classname}}}Builder b) => b{{#vendorExtensions.x-parent-discriminator}}..{{propertyName}}=b.discriminatorValue{{/vendorExtensions.x-parent-discriminator}}{{#vendorExtensions.x-self-and-ancestor-only-props}}{{#defaultValue}}
-      ..{{{name}}} = {{#isEnum}}{{^isContainer}}const {{{enumName}}}._({{/isContainer}}{{/isEnum}}{{{defaultValue}}}{{#isEnum}}{{^isContainer}}){{/isContainer}}{{/isEnum}}{{/defaultValue}}{{/vendorExtensions.x-self-and-ancestor-only-props}};
+      ..{{{name}}} = {{#isEnum}}{{^isContainer}}{{{defaultValue}}}{{/isContainer}}{{/isEnum}}{{^isEnum}}{{{defaultValue}}}{{/isEnum}}{{/defaultValue}}{{/vendorExtensions.x-self-and-ancestor-only-props}};
 
 {{/vendorExtensions.x-is-parent}}  @BuiltValueSerializer(custom: true)
   static Serializer<{{classname}}> get serializer => _${{classname}}Serializer();

modules/openapi-generator/src/main/resources/go/go.mod.mustache

@@ -1,10 +1,11 @@
 module {{gitHost}}/{{gitUserId}}/{{gitRepoId}}{{#isGoSubmodule}}/{{packageName}}{{/isGoSubmodule}}
 
-go 1.18
+go 1.23
 
 require (
 	{{#hasOAuthMethods}}
-	golang.org/x/oauth2 v0.0.0-20210323180902-22b0adad7558
+	github.com/stretchr/testify v1.10.0
+	golang.org/x/oauth2 v0.27.0
 	{{/hasOAuthMethods}}
 	{{#withAWSV4Signature}}
 	github.com/aws/aws-sdk-go v1.34.14

modules/openapi-generator/src/main/resources/go/go.sum.mustache

@@ -5,8 +5,8 @@ golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e h1:bRhVy7zSSasaqNksaRZiA5EEI+Ei4I1nO5Jh72wfHlg=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 {{#hasOAuthMethods}}
-golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
-golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
+golang.org/x/oauth2 v0.27.0 h1:da9Vo7/tDv5RH/7nZDz1eMGS/q1Vv1N/7FCrBhI9I3M=
+golang.org/x/oauth2 v0.27.0/go.mod h1:onh5ek6nERTohokkhCD/y2cV4Do3fxFHFuAejCkRWT8=
 {{/hasOAuthMethods}}
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 h1:YUO/7uOKsKeq9UokNS62b8FYywz3ker1l1vDZRCRefw=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -16,4 +16,4 @@ google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7
 {{#importValidator}}
 gopkg.in/validator.v2 v2.0.1 h1:xF0KWyGWXm/LM2G1TrEjqOu4pa6coO9AlWSf3msVfDY=
 gopkg.in/validator.v2 v2.0.1/go.mod h1:lIUZBlB3Im4s/eYp39Ry/wkR02yOPhZ9IwIRBjuPuG8=
-{{/importValidator}}
+{{/importValidator}}

modules/openapi-generator/src/main/resources/java-camel-server/api.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-camel-server/errorProcessor.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-camel-server/restConfiguration.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-camel-server/routesImpl.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-camel-server/test.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-camel-server/validation.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-helidon/client/libraries/mp/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/java-helidon/client/libraries/se/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/java-helidon/common/licenseInfo.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * {{{appName}}}
  * {{{appDescription}}}
  *

modules/openapi-generator/src/main/resources/java-pkmst/api.mustache

@@ -1,4 +1,4 @@
-/**
+/*
  * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
  * https://openapi-generator.tech
  * Do not edit the class manually.

modules/openapi-generator/src/main/resources/java-wiremock/wiremock.mustache

@@ -1,4 +1,4 @@
-/**
+/*
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) ({{{generatorVersion}}}).
 * https://openapi-generator.tech
 * Do not edit the class manually.

modules/openapi-generator/src/main/resources/kotlin-client/anyof_class.mustache

@@ -110,7 +110,7 @@ import java.io.IOException
                     if (value.actualInstance is {{#isArray}}List<*>{{/isArray}}{{^isArray}}{{{dataType}}}{{/isArray}}) {
                     {{#isArray}}
                         val list = value.actualInstance as List<Any>
-                        if (list.get(0) is {{{items.dataType}}}) {
+                        if (!list.isEmpty() && list.get(0) is {{{items.dataType}}}) {
                             val array = adapter{{#sanitizeGeneric}}{{{dataType}}}{{/sanitizeGeneric}}.toJsonTree(value.actualInstance as {{{dataType}}}?).getAsJsonArray()
                             elementAdapter.write(out, array)
                             return