java - Jackson, Jdk8Module, MrBeanModule and default value for Optional

Question

I use MrBeanModule and Jdk8Module. I have simple interface

public interface Point {
    Optional<Integer> getId();
}

Deserialization with value and null works fine, but I have a case when field id may be absent. Example:

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new MrBeanModule());
mapper.registerModule(new Jdk8Module());

String json = "{"id":35}";
Point p = mapper.readValue(json, Point.class);
System.out.println(p.getId());

json = "{"id":null}";
p = mapper.readValue(json, Point.class);
System.out.println(p.getId());

json = "{}";
p = mapper.readValue(json, Point.class);
System.out.println(p.getId());

It produces the following output:

Optional[35]
Optional.empty
null

Is there solution to get Optional.empty for the last case without interface implementation and use default value?

Answer 1

等待大神答复