How to de/serialize an immutable object without default constructor using ObjectMapper?

Question

I want to serialize and deserialize an immutable object using com.fasterxml.jackson.databind.ObjectMapper.

The immutable class looks like this (just 3 internal attr

Answer 1

You can use a private default constructor, Jackson will then fill the fields via reflection even if they are private final.

EDIT: And use a protected/package-protected default constructor for parent classes if you have inheritance.