How to parse following json using Gson?

Question

I have seen similar questions about parsing json with dynamic keys, but could not figure out how to parse the following json:

{
    "unknown": 
     {
         "id":3980715,
         "name":"namename",
         "profileIconId":28,
         "revisionDate":1451936993000
     }
}

Here, the "unknown" key is dynamic, it can be anything. We do not know what it is.

I tried the following class:

public class MyResponseClass {
    private Map<String, Object> myResponse;

    //Getter and setter
}

But myResponse becomes null after using gson like the following:

return gson.fromJson(response, MyResponseClass.class);

So, how can i do this?

Thanks.

Duplicate of http://stackoverflow.com/questions/20442265/how-to-decode-json-with-unknown-field-using-gson — Raniz, Jan 05 '16 at 08:25
It is similar, but i do not think it is the duplicate. I have only object in my response — yrazlik, Jan 05 '16 at 08:36

score 1 · Accepted Answer · answered Jan 05 '16 at 08:43

1

I could manage to parse it like the following:

Type mapType = new TypeToken<Map<String, MyResponseClass>>() {}.getType();
Map<String, MyResponseClass> map = gson.fromJson(response, mapType);

and then iterated over map to get what I want.

answered Jan 05 '16 at 08:43

yrazlik

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score 1 · Answer 2 · answered Jan 05 '16 at 08:46

1

Add an annotation to the field myResponse.

public class MyResponseClass {
    @SerializedName("unknown")
    private Map<String, Object> myResponse;

    //Getter and setter
}

answered Jan 05 '16 at 08:46

coolguy · Answer 3 · 2016-01-05T08:33:38.980

0

Try this:

// String jsonStr = ...;
Gson gson = new Gson();
Map<String, Object> jsonData = new HashMap<String, Object>();
jsonData = (Map<String, Object>)gson.fromJson(jsonStr, Object.class);

Your JSON data will be stored in Map<String, Object> (which is the simpliest way to store JSON data in Java).

So in this map at unknown key you will have another map with id, name etc.

edited Jan 05 '16 at 08:33

answered Jan 05 '16 at 08:13

coolguy

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'Map jsonData = (Map)gson.fromJson(jsonStr, Object.class)` is enough – Raniz Jan 05 '16 at 08:27

How to parse following json using Gson?

3 Answers3