动态转换对通用类的响应

Question

I have the following generic class:

public class ErrorJsonResponse<T> {

    private String error;
    private String errCode;
    private String message;
    private T data;

    public ErrorJsonResponse() {
    }

    public ErrorJsonResponse(String error, T data) {
        setError(error);
        setData(data);
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

I need to cast to this class dynamically during run time, like:

(ErrorJsonResponse <runtimeType>) result

How can I do it?

Answer 1

You can cast generic generic classes like this:

public void onResult(ErrorJsonResponse<?> response) {
    ErrorJsonResponse<RuntimeException> castedResponse = (ErrorJsonResponse<RuntimeException>) response;
}

You cannot cast them like this:

public void onResult(ErrorJsonResponse<OtherException> response) {
    ErrorJsonResponse<RuntimeException> castedResponse = (ErrorJsonResponse<RuntimeException>) response;
}

In the above example ErrorJsonResponse<OtherException> and ErrorJsonResponse<RuntimeException> are inconvertible types