How to map a Map< String, ArrayList> object in hibernate?

Question

Java

There is Map<String, ArrayList<String>> data;an object which is inside @Entity .
It is required to map only ArrayList<String>in the database, i.e. only data.entrySet().
As a result, you need to get a table consisting only of ArrayList.
Is it possible to do this without creating an additional variable?
How to do it with annotations?

Answer 1

No way. Marshaling is always symmetrical. If it were possible to discard the mapping keys when saving the entity to the database, then where would they come from when restoring the entity from the database?