How to map a DTO to an existing JPA entity?

Question

I\'m trying to map a Java DTO object to an existing JPA entity object without having to do something like the following:

public MyEntity mapToMyEntity(SomeDT         


        

Answer 1

Currently ModelMapper supports mapping also to an existing object.

It is possible to do the following (for a pseudo Spring example):

MyEntity mye = repository.finById(id);
ModelMapper mm = new ModelMapper();    
mm.map(myDTO, mye);
repository.save(mye):

I am using version 2.3.1 but earlier versions might support this functionality also