resteasy-reactive: nested objects as http query params

[mapuci]

I have been trying to create something similar to this:

@Getter
@Setter
public class UserFilter {
    @RestQuery private String name;
    @BeanParam private AddressFilter address1;
    @BeanParam private AddressFilter address2;

   @Getter
   @Setter
    public static class AddressFilter {
        @RestQuery private String province;
        @RestQuery private String city;
        @RestQuery private String area;
    }
}

@Path("user")
public class UserEndpoint
{
    @GET
    @Path("/list")
    public List<ProductDto> listWithQueryParams(
            @Valid @BeanParam UserFilter filter
    {
        return ...;
    }
}

And this cannot work, since both address1 and address2 bind to the same queryParameters; province, city, area.
I would like to bind query parameters for addresses to something like address1.province, address2.city...

I know that there are several ways to implement the desired logic. Each with its own drawbacks.

1. Inject UriInfo as method arg:

    @GET
    @Path("/list")
    public List<ProductDto> listWithQueryParams(
            @Context UriInfo uriInfo
    {
        return ...;
    }

In this case, you have to parse query parameters to POJO mannualy. You also lose openapi spec for available query params.

2. 'Normalize' the POJO

@Getter
@Setter
public class UserFilter {
    @RestQuery private String name;
    @RestQuery  private String address1province;
    @RestQuery  private String address1city;
    @RestQuery  private String address1area;
    @RestQuery  private String address2province;
    @RestQuery  private String address2city;
    @RestQuery  private String address2area;
}

This works exactly how I would like it to work. But... Its ugly as hell :)

3. Custom ParamConverterProvider

Pass object to url as jsons, create custom ParamConverterProvider.
Thats a very bad and ugly idea, even the swaggerUi do not support sending objects as queryParams.
https://github.com/swagger-api/swagger-ui/issues/7696

This is by no means a bug, its more like a feature request.
The documentation states

So this cannot work.

With spring, this is supported out of the box.
https://www.taogenjia.com/2022/08/17/How-to-Pass-Nested-Object-to-Spring-MVC-Controller/

I'm wondering if it could also be supported with quarkus in some way... Maybe another annotation, similar to @Separator, to notate the prefix of nested objects parameters?

@Getter
@Setter
public class UserFilter {
    @RestQuery private String name;
    @BeanParam @Prefixed("address1") private AddressFilter address1;
    @BeanParam @Prefixed("address2") private AddressFilter address2;

   @Getter
   @Setter
    public static class AddressFilter {
        @RestQuery  private String province;
        @RestQuery  private String city;
        @RestQuery  private String area;
    }
}