Java - unable to map JSON array to object with Spring getForObject()

Question

I have to consume an API RESTful web service. At the moment I have to deal with a JSON object which looks like:

{
  "success":true,
  "error":"",
  "message":"",
  "data":[
     ["USD","US Dollar","11,696", "connected"],
     ["EUR","Euro","10,733","connected"]
  ]
}

And this is the class I use in general to hold most endpoints of this web service:

public class Response {
    public boolean success;
    private String error;
    private String message;        
    private List<Map<Integer, Array>> data;

    public String getError() {
        return this.error;
    }

    public String getMessage() {
        return this.message;
    }

    public Map<Integer,Array> getData() {
        return this.data.get(0);
    }
}

When running, app crashes with:

Could not read JSON: Can not deserialize instance of java.util.LinkedHashMap 
     out of START_ARRAY token

it's supposed to map "data" as like in the example I provided — Jhon Zunda, Dec 23 '15 at 18:15
I was trying to nudge you in the direction of that is completely wrong for what you are trying to map. — user1231232141214124, Dec 23 '15 at 20:17
oh...didnt got it then :) could you please spend 5 minutes to answer? thank you — Jhon Zunda, Dec 23 '15 at 21:27
based on your comment below, your description of data does not match the example. But sounds like you could try List> — KarlM, Dec 24 '15 at 00:29

score 0 · Answer 1 · answered Dec 23 '15 at 16:36

0

We need to change the type of 'data' from

List<Map<Integer, Array>>

to

List<List<String>>

answered Dec 23 '15 at 16:36

Darshan Mehta

30,102
11
68
102

Thank you for you interest, but seems that it doesnt work. I get now: Could not read JSON: Unrecognized field "data" ... Indeed, the 2nd level in the nested array is not a List of Strings, but rather an array with int as key and an array of strings as value .. – Jhon Zunda Dec 23 '15 at 18:14

score 0 · Accepted Answer · answered Dec 24 '15 at 13:25

0

I ended up figuring out that what i need is just:

private List<ArrayList<String>> data;

Worked like a charm.

answered Dec 24 '15 at 13:25

Jhon Zunda

63
11

Java - unable to map JSON array to object with Spring getForObject()

2 Answers2