HttpRequest doesn't provide a way to capture error deseriliser type

[rajkumarpalani]

General information

• SDK/Library version: All
• Java Version: All

Issue description

HttpRequest allows to define a response payload deserialiser but doesn't have options to specify an error deserialiser. Any non 2xx status response triggers a HttpException and the error message is deserialised to String leaving clients to parse/deserialise back to an error entity

Problem:

       try { 
           HttpResponse<CreatePayoutResponse> response = client.execute(request);  
        } catch (HttpException e) {  
            String error = e.getMessage();  
           //Client to parse the error string to understand fields
        }  

Possible Solution:
Clients are expected to either parse the string to understand the fields or deserialise the entity themselves like

       try { 
           HttpResponse<CreatePayoutResponse> response = client.execute(request);  
        } catch (HttpException e) {  
            String error = e.getMessage();  
            Encoder encoder = new Encoder();  
            Error payoutError = encoder.deserializeResponse(new ByteArrayInputStream(error.getBytes(StandardCharsets.UTF_8)), Error.class, e.headers());  
            System.out.println(payoutError);  
        }  

Expectation:
It would improve the integration experience to allow the error type be available in the HttpException

       try { 
           HttpResponse<CreatePayoutResponse> response = client.execute(request);  
        } catch (HttpException e) {  
            Error payoutError = e.getError(); 
            System.out.println(payoutError.getName()); 
        }