Two child attributes from same parent Gson Exception

[robertoestivill]

Hello there,

I'm experiencing an issue with the following structure:

Json

{ 
 "coord":  {
    "lat": 32.123,
    "lon": 32,123
  }
}

Pojo

package com.example;

import com.google.gson.annotations.SerializedName;
import ru.noties.flatten.Flatten;
import ru.noties.flatten.Flattened;

public class Clazz{

  @Flatten("lat")
  @SerializedName("coord")
  public Flattened<Double> latitude;

  @Flatten("lon")
  @SerializedName("coord")
  public Flattened<Double> longitude;
}

Exception

Caused by: java.lang.IllegalArgumentException: class com.example.Clazz declares multiple JSON fields named coord
E/AndroidRuntime( 6497):    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
E/AndroidRuntime( 6497):    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:96)
E/AndroidRuntime( 6497):    at com.google.gson.Gson.getAdapter(Gson.java:416)

I'm basically trying to avoid having two classes, one per Json object (root & coord)

Any clue what might be going on? Does this means that I can not flatten two child attributes from the same parent? Does this have anything to do with the fact that 'lat' and 'lon' are first inner attributes and therefore theres no really a chain in the @Flatten annotation ?

[noties]

Hi! Yeah, man, looks like one cannot flatten json like this... Gson throws an exception, because having duplicated keys is invalid... Right now I cannot see a way out

[Tishka17]

@robertoestivill I have some different implementation. Probably not very effective, but it works with such attributes