Cannot construct instance of - Jackson

Question

I am using Jackson and I\'m having problems, when I try to deserialize an Object I get the following error:

com.fasterxml.jackson.databind.JsonMappingExcepti         


        

Answer 1

You cannot instantiate an abstract class, Jackson neither. You should give Jackson information on how to instantiate MyAbstractClass with a concrete type.

See this answer on stackoverflow: Jackson JSON library: how to instantiate a class that contains abstract fields

And maybe also see Jackson Polymorphic Deserialization