Parsing an List of Abstract objects of POJOS

Question

I want to parse, with Gson's help, a list of abstract objects:

List<Pair<Integer, Integer>> 

Until now, I only had to parse Lists of objects, so when I had to declare it's type I used:

 new TypeToken<List<myObjectDto>>() {}.getType());

But in this case, I don't understand how I should declare this type in my Gson.fromJson method.

Answer 1

You just have to put your new List inside TypeToken :

Gson gson = new Gson();
Type type = new TypeToken<List<Pair<Integer, Integer>>>() {}.getType();
List<Pair<Integer, Integer>> yourList = gson.fromJson(jsonString, type);