获取泛型类型

Question

我需要获取泛型类型。我已经尝试关注

public abstract class RetrofitRequest<RESULT> extends SpiceRequest<Response<RESULT>> {

    public RetrofitRequest(){
        super(Response<RESULT>.class); //compile time error
    }

    @Override
    public final Response<RESULT> loadDataFromNetwork() throws Exception {
        WebService webService = RestFulWebService.getRestFulWebService();
        return doInBackground(webService);
    }

    protected abstract Response<RESULT> doInBackground(WebService webService) throws Exception;

}

知道如何完成这项工作吗？提前致谢！！！

和SpiceRequest是这样的

public abstract class SpiceRequest<RESULT> implements Comparable<SpiceRequest<RESULT>> {

    public SpiceRequest(Class<RESULT> clazz) {
        ....
    }
}

谢谢！

-supunz

Answer 1

您需要在请求 Class<RESULT> 时镜像您的父控制器。

public RetrofitRequest(Class<RESULT> clazz){
    super(clazz);
}

令人遗憾的是，现在您必须沿着继承链一直沿用它，但是如果您想要实例化它，您还需要提供 class：

RetrofitRequest<String> impl = new RetrofitRequestImpl<String>(String.class);

Answer 2

在 RC 评论的帮助下解决了自己的问题

public abstract class RetrofitRequest<RESULT> extends SpiceRequest<Response<RESULT>> {

    protected RetrofitRequest(){
        super((Class<Response<RESULT>>) (Class<?>) Response.class);
    }

    @Override
    public final Response<RESULT> loadDataFromNetwork() throws Exception {
        WebService webService = RestFulWebService.getRestFulWebService();
        return doInBackground(webService);
    }

    @WorkerThread
    protected abstract Response<RESULT> doInBackground(WebService webService) throws Exception;

}

和https://coderanch.com/t/681438/java/Class-Type-List-java#3196253拯救了我的一天

获取泛型类型

Get type of Generics

java

generics

retrofit2

generic-programming

robospice