Ufdjrw

If the POST / PATCH body needs to look like this

 "class_name" : 
 "field_a" : "fjdksljf"
 "field_b" : "jfsljd"
 ...
 etc.
 

and I have a POJO

public class ClassName () 

 @SerializedName("field_a")
 String fieldA;

 @SerializedName("field_b")
 String fieldB;

 ... etc.

and I want to pass it as

@PATCH("endpoint_url")
Call<ResponseBody> testFunction(@Body ClassName class)

how can I annotate the class itself with the class_name mapping needed for the JSON request?

Is there an easy way to do it (some GSON annotation maybe) or is my only option to make a RequestClass that wraps ClassName and annotates it with serialized name there?

(I tried annotating the class with @SerializedName but it gives me a "not applicable to type" warning.)

This ended up being a good solution for me. While it is possible to wrap it in another class, it doesn't really make sense in my use case since most of my POST bodies require a JSON key for the POJO I'm sending.

// to use the necessary @SerializedName annotations
String classNameJson = new Gson().toJson(className); // "field_a": "fjdksljf", "field_b" : "jfsljd", ... etc.
JSONObject json = new JSONObject();
try 
 // must make this a new JSONObject or else it will handle classNameJson as a string and append unnecessary quotes
 json.put("class_name", new JSONObject(classNameJson)); 
 catch (JSONException e) 
 // handle the error

String result = json.toString();

Result should print something like this "class_name":"field_a": "fjdksljf", "field_b" : "jfsljd", ... etc.

Got this idea from the following posts:

• single key value to Json with Gson


• JSONObject.toString: how NOT to escape slashes


• Java Append object to JSON