Unity3D C# - Parse JSON that has an additional array around data-CodePudding

I'm stuck in a situation where my json (coming from a source I can't control) has a sort of "middle man" array that doesn't do anything.

If I modify the json I can get values out but as it is I'm stumped.

stripped down json example

"geopoly": {
  "type": "Polygon",
  "coordinates": [
    [
      [
        -74.7,
        40.72
      ],
      [
        -74.73,
        40.71
      ]
    ]
  ]
}

Question

How can I convert json similar to this into a c# object using the Unity JsonUtility.FromJson?

current attempt: c# containers for parsing

[Serializable]
public struct GeoPoly
{
    public string type;
    public List<FloatList> coordinates;
}

[Serializable]
public class MiddleManList : List<FloatList> {}

[Serializable]
public class FloatList : List<float> {}

I can see "type" correctly but "coordinates" is always [0]: Count = 0 or null so I'm not sure how to get around this.

CodePudding user response：

you can use it this way

var data = JsonUtility.FromJson<Root>(json);

add Root and coordinates

[Serializable]
public class Root
{
  public Geopoly geopoly {get; set;}
}
[Serializable]
public struct GeoPoly
{
    public string type {get; set;}
    public List<List<List<float>>> coordinates { get; set; }
}

and fix json by wrapping in {}

{
"geopoly": {
  "type": "Polygon",
  "coordinates": [
    [
      [
        -74.7,
        40.72
      ],
      [
        -74.73,
        40.71
      ]
    ]
  ]
}
}

if it is not workig still try to remove {get; set;}, some versions of unity serializer doesn't know how to serialize properties.