Gson TypeToken with dynamic ArrayList item type

Question

I have this code:

Type typeOfObjectsList = new TypeToken>() {}.getType();
List objectsList = new Gson().fromJso         


        

Answer 1

sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl workes. No need for custom implementation

Type type = ParameterizedTypeImpl.make(List.class, new Type[]{childrenClazz}, null);
List list = gson.fromJson(json, type);

Can be used with maps and any other collection:

ParameterizedTypeImpl.make(Map.class, new Type[]{String.class, childrenClazz}, null);

Here is nice demo how you can use it in custom deserializer: Deserializing ImmutableList using Gson