Gson.toJson gives StackOverFlowError, how to get proper json in this case? (public static class)

Question

I currently have the following class:

 static final class TabInfo{
   public final String tag;
   public final Class clss;
   public Bundle args;

          


        

Answer 1

As I suggested the "change from class" to string,
I allow myself for the sake of our readers to answer here for the first part:
Don't use Class as a field, but use String that will contain the full class name
TabInfo should look like:

static final class TabInfo{
   public final String tag;
   public final String clss;
   public Bundle args;

   TabInfo(String _tag, Class<?> _class, Bundle _args) {
       tag = _tag;
       clss = _class.getName();
       args = _args;
   }
 }

Regarding 2nd part:
I don't know what Bundle class is - please provide info,
as I had to change a bit and write my own class for experiment.

Person class is:

public class Person implements Serializable {
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public Person() {

    }

    public Person(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    private String name;
    private int age;
}

Main class for checking is:

public class Main {
    public static void main(String[] args) {
        Type type = new TypeToken<HashMap<String,Stack<Person>>>(){}.getType();
        Gson gson = new Gson();
        HashMap<String,Stack<Person>> map = new HashMap<String, Stack<Person>>();
        map.put("yair", new Stack<Person>());
        map.get("yair").add(new Person("Yair",36));
        String str = gson.toJson(map,type);
        System.out.println(str);
        map = gson.fromJson(str,type);
        String str2 = gson.toJson(map,type);
        System.out.println(str2);

    }
}

Feel free to run it, you will see both str and str2 are printed just fine.

Update
I checked the Bundle class, and saw that it contains too much information (In my humble opinion) to be a simple arguments collection.
I don't see why in the above question a simple collection cannot be used instead.
Serialization should contain as minimal data as possible
(think about cases in which you take a serialized data and store it on some storage device, or send it over the network). So unless Bundle provides you a special functionality that a collection doesn't - don't use it.
As a rule of thumb remember you cannot serialize everything with Json - there are limitations (recursive data-types for example) - so yes, there will be cases where you will have to translate from one type to a JSON-serializable type.
This pattern is also used in other cases, I suggest you read more about data transfer objects