Allow the creation of snaphots of non-Jdbc based databases

[LeovR]

I'd like to create an extension for database diffs with JPA-annotated classes.
Currently most of the subclasses of JdbcSnapshotGenerator heavily depend on the database being an AbstractJdbcDatabase.

I want to create a Database-Class for the JPA-annotated classes which is not a subclass of AbstractJdbcDatabase. But since all subclasses have a priority > 0 they are considered as snapshot generators and then fail with exceptions.

[Vulcannis]

Just FYI, liquibase-hibernate already supports doing diffs from JPA. You just point it to a persistence.xml instead of a hibernate config file. The official version only supports liquibase 2 and an older version of hibernate though. I've got a version working locally for liquibase 3 and hibernate 4, I'll try to push it up soon.

[LeovR]

I'm aware of the current liquibase-hibernate implementation. But I'm interested in a version which works with liquibase 3 and hibernate 4.
Furthermore, I am not using any persistence.xml but I am using spring's package scanning. Thus, I need an option of providing some packages to be scanned instead of a persistence.xml

[Vulcannis]

I have no experience with Spring's JPA support, but package scanning works fine with liquibase-hibernate. You do need a persistence.xml file but it's nearly empty, basically a couple properties.

I found it quite difficult to get good metadata from Hibernate though, and some JPA information isn't even available, so a pure JPA solution would be better.

[nvoxland]

Similar code has been already put into 3.0.x now. There is also support just added to liquibase-hibernate to specify a class that returns a hibernate Configuration object when you don't have a hibernate.xml or persistence.xml file. If you are interested/able to doing some testing of the liquibase-hibernate extension to see if it does what you need and expect before it is released that would be great.