Flat csv data to Json - json

Question

I am trying to process a Json data in Java. I have the data in below format (it is nested data structure with arrays etc.)
person.name,person.friend[0],person.friend[1],person.address.city,person.address.country
1,x,y,kolkata,india
2,a,b,london,uk
The first line is header denoting the nested object hierarchy. I want a json in below format,
{
"data" : [
{
"name" : "1",
"friend" : ["x","y"],
"address" : { "city" : "kolkata", "country" : "india" }
},
{
"name" : "2",
"friend" : ["a","b"],
"address" : { "city" : "london", "country" : "uk" }
} ]
}
The object structure is dynamic and I dont know the columns or header in advance, i.e. I can not use any predefined POJO to get populated with the data. In this example, it "Person" object but it may be any object structure.
I have gone through Jackson or Gson API, but none seems to fulfill this requirement. Is there any API that can help? or any other wayout?
Thanks

Answer 1

You need to do it in 2 steps.
First, you have to parse your CSV. I recommend superCSV. Parsing CSV may be fancy sometimes, so I really recommend you to use a library for that.
Second, you can serialize into JSON. Then you can use GSON, jackson, flexjson, whatever.

Answer 2

After a long Google...I found that the only option is to represent a collection based object structure in flat file is repeated rows,
person.name,person.friends,person.address.city,person.address.country
1,x,kolkata,india
1,y,kolkata,india
2,a,london,uk
2,b,london,uk
where the non-array elements repeats. We need to form a json from this, then need to filter or club the same object by its ID (here person.name)