[BUG][JAVA][JAX-RS] Interface does not generate additional model type annotations

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
  I assume OpenAPI Generator's own samples are valid.
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Interfaces cannot be generated with additional model type annotations. This is required to more easily mock them in within the Quarkus framework.

openapi-generator version

6.4.0

OpenAPI declaration file content or url

swagger: "2.0"
info:
  version: 1.0.0
  title: Swagger Petstore
consumes: [application/json]
produces: [application/json]
paths:
  /pets:
    get:
      responses:
        "200":
          description: pet response
          schema:
            type: string
        default:
          description: unexpected error
          schema:
            $ref: string

Generation Details

Clone this repo and step inside it: openapi-generator--BUG-JAVA-Interface-does-not-generate-additional-model-type-annotations-example
Java 17 is required.
Run ./gradlew clean openApiGenerateJaxrs and the generated file is created in this path: build/generated-openapi/src/gen/java/com/example/api/resource/PetsApi.java

Here is the actual output (to the left) and the expected output (to the right):

package com.example.api.resource;                               package com.example.api.resource;


import javax.ws.rs.*;                                           import javax.ws.rs.*;
import javax.ws.rs.core.Response;                               import javax.ws.rs.core.Response;



import java.io.InputStream;                                     import java.io.InputStream;
import java.util.Map;                                           import java.util.Map;
import java.util.List;                                          import java.util.List;
import javax.validation.constraints.*;                          import javax.validation.constraints.*;
import javax.validation.Valid;                                  import javax.validation.Valid;

@Path("/pets")                                                  @Path("/pets")
                                                              > @javax.enterprise.context.ApplicationScoped
@javax.annotation.Generated(value = "org.openapitools.codegen   @javax.annotation.Generated(value = "org.openapitools.codegen
public interface PetsApi {                                      public interface PetsApi {

    @GET                                                            @GET
    @Produces({ "application/json" })                               @Produces({ "application/json" })
    String petsGet();                                               String petsGet();
}                                                               }

The bug appears to come from the fact that the configOption additionalModelTypeAnnotation is ignored when running together with the configOption interfaceOnly set to "true".

Steps to reproduce

Set your equivalent openApiGenerate options (if you are running maven or gradle) to these:
Set the configvalue additionalModelTypeAnnotation to anything and set the configOption interfaceOnly to "true".

Now your openApiGenerate should look as following (for example in build.gradle):

task openApiGenerateJaxrs(type: GenerateTask) {
    generatorName = "jaxrs-spec"
    inputSpec = "$projectDir/contract.yaml"
    outputDir = "$buildDir/generated-openapi"
    apiPackage = "com.example.api.resource"
    invokerPackage = "com.example.api.invoker"
    modelPackage = "com.example.api.model"
    configOptions = [
        additionalModelTypeAnnotation: "@javax.enterprise.context.ApplicationScoped",
        library: "quarkus",
        interfaceOnly: "true",
        useSwaggerAnnotations: "false"
    ]
    globalProperties = [
        apiTests: "false",
        modelTests: "false"
    ]
}

Running ./gradlew clean openApiGenerateJaxrs will not produce interfaces with desired Annotation.

Suggest a fix

I am suspecting it's one of the mustache files which are missing the double variable, but I cannot guess which one {{>generatedAnnotation}{{>additionalModelTypeAnnotations}} .

Start with the JAX-RS generator templates and the handling of the additionalModelTypeAnnotation and interfaceOnly options. Run ./gradlew clean openApiGenerateJaxrs using the provided reproduction and inspect build/generated-openapi/src/gen/java/com/example/api/resource/PetsApi.java. Done means the generated interface includes @javax.enterprise.context.ApplicationScoped when both options are enabled.