Cloning JPA entity

Question

I have a JPA entity already persisted in the database.
I would like to have a copy of it (with a different id), with some fields modified.

What is the easiest wa

Answer 1

You could use mapping frameworks like Orika. http://orika-mapper.github.io/orika-docs/ Orika is a Java bean mapping framework that recursively copies data from one object to another. It is easy to configure and provides various flexibilities as well.

Here is how I have used it in my project: added a dependecy :

 
      ma.glasnost.orika
      orika-core
      1.4.6

Then use it in the code as follows:

MapperFactory mapperFactory = new DefaultMapperFactory.Builder().build();
MapperFacade mapper=mapperFactory.getMapperFacade();
User mappedUser = mapper.map(oldUser, User.class);

This might help if you have many usecases where such kind of cloning is needed.