Unable to use generic class as 'asObject' parameters

When I work with Spring RestTemplate class, I can use ParametrizedTypeReference instance to provide generic class to deserialization, like so:

ResponseEntity<ApiResponse<Payment>> response = template.exchange(request, new ParameterizedTypeReference<ApiResponse<Payment>>() {});

This is really nicely integrated in the overall code.

It would be nice to include a chapter on how to achieve this with Unirest. For example:

// Generic response type

HttpResponse response = Unirest.post(uri)
    .header("Accept", "application/json")
    .header("Content-Type", "application/json")
    .body(body)
    .asString();

ObjectMapper mapper = new ObjectMapper();
TypeReference<ApiResponse<Payment>> type = new TypeReference<ApiResponse<Payment>>() {};
ApiResponse<Payment> responseWrapper = mapper.readValue(response.getRawBody(), type);

Ideally, it would be nice to be able to provide some API where I can actually use type reference as a parameter, for example:

HttpResponse response = Unirest.post(uri)
    .header("Accept", "application/json")
    .header("Content-Type", "application/json")
    .body(body)
    .asObject(new TypeReference<ApiResponse<Payment>>() {});

[petrdvorak]

@andrekat No, please read my original post. I have a generic ApiRequest<T> and ApiResponse<T> classes and I need to serialize these using Unirest. However, there is no such thing as ApiResponse<SomeClass>.class, hence you need to use TypeReferece as I demonstrated in my workaround. It would be nice to have .asObject(t) accepting TypeReference as parameter and using ObjectMapper instance associated with Unirest…

[andrekat]

I am using Unirest with generic class calls. Is this what are you looking for?

public <T> T doGet(String path, Class<T> className) throws UnirestException {

        String url = (path.startsWith("http") || path.startsWith("www")) ? path : base_url + path;

        Main.log.debug("doGet: " + url);

        if (!path.startsWith("/")) {
            path = StringUtils.overlay(path, "/", 0, 0);
        }

        return Unirest.get(this.base_url + path).header("accept", "application/json").asObject(className).getBody();
    }

Example of calling this method:

ResponseMusicContent response = OneClient.getInstance().doGet(url, ResponseMusicContent.class);