Question

We want to merge 2 set of data using the same model:
we have 2 databases that have the same DDL, but containing different data.
We want to merge both and save the result. Merge should be configurable to allow us to write some rules.

Do you known any framework / library able to do that ?

Answer 1

You can explore Dozer for this purpose.

Dozer is a Java Bean to Java Bean
mapper that recursively copies data
from one object to another. Typically,
these Java Beans will be of different
complex types. Dozer supports simple
property mapping, complex type
mapping, bi-directional mapping,
implicit-explicit mapping, as well as
recursive mapping. This includes
mapping collection attributes that
also need mapping at the element
level.