[hibernate-dev] [ORM/OGM] String-typed version properties

All, I'm working on supporting on the CouchDB backend for OGM, and more specifically on integrating the optimistic locking functionality which is built into CouchDB [1]. For that purpose, each CouchDB document has a defined field "_rev" which is a UUID and is updated on the server-side upon each write. So I thought I could map this attribute like this: @Generated //this prop. needs to be read back value after writes @Version //this prop. is used for optimistic locking String _rev; But this gave me a CCE since @Version is not allowed on Strings (org.hibernate.type.StringType is no VersionType). Looking around, I found BinaryType which looks like what'd I need for Strings, there is also a note mentioning basically the same use case case [2]. If I register a custom type derived from StringType with an equivalent implementation of the VersionType contract, I get the behavior I need. Does anyone see a problem with making o.h.t.String a VersionType in this way (i.e. it'd only support DB-generated values)? Thanks, --Gunnar [1] https://hibernate.atlassian.net/browse/OGM-392 [2] "only known application of binary types for versioning is for use with the TIMESTAMP datatype supported by Sybase and SQL Server, which are completely db-generated values"