QLRM, JPA nativeQuery result transformer library

http://simasch.github.io/qlrm/
https://github.com/simasch/qlrm

Example:

Query q = em.createNativeQuery(
    "SELECT c.id, c.name, COUNT(o) as orderCount, AVG(o.price) AS avgOrder " +
    "FROM Customer c " +
    "JOIN Orders o ON o.cid = c.id " +
    "GROUP BY c.id, c.name");
      
List<CustomerDetailsResult> list = jpaResultMapper.list(q, CustomerDetails.class);