Jackson Deserialization By Inheritance

Question

I have a class with the following structure

Class A { private String type; private T entity; }

And my JSON structure is like this

{"type":"Relation1","entity":"{..}"} --> entity should be Relation1.class
{"type":"Relation2","entity":"{..}"}  --> entity should be Relation2.class

How can I achieve the desired outcome using Jackson deserilizaton?

Answer 1

If you use inheritance in your model you can't obtain a clean json like showed because Jackson couldn't deserialize the json. If you want to use Jackson you have to configure the ObjectMapper:

ObjectMapper mapper = new ObjectMapper();
mapper.enableDefaultTyping();

And then you will obtain a Json that include the T class name that is needed for deserialization process.

Here you find a complete guide: Guide