I have just released a technology preview of JDBCPersistence project. JDBCPersistence is an ORM framework designed and implemented to deliver performance of hand written JDBC code.
Performance is achieved by employing bytecode generation that creates classes that specifically target operation that user requests the framework to do. Such, an insert method generated by the framework, will operate on an instance of a concrete class, reading properties from the bean using straight method calls (not reflection). The values are then being supplied to PreparedStatement using its respective methods eg. setInt(int value, int position), setString(String value, int position) etc, again via straight method calls.
Code generation occurs at runtime, so the setup is very easy, there is no build step. SQL is leveraged as the query language.
All are welcome to download JDBCPersistence Technology Review Release from http://www.jdbcpersistence.org and don't hesitate to provide feedback and questions via jdbcpersistence -(at gmail com