Learn and test graffito-jcr-mapping - http://incubator.apache.org/graffito/jcr-mapping/

graffito-jcr-mapping is like ORM to jcr.

This Graffito subproject is an object/JCR persistence and query service. This tools lets you to persist java objects into a JCR compliant repository - including association, inheritance, polymorphism, composition, and the Java collections framework. Furthermore, this jcr-mapping allows you to express queries in Java-based Criteria, as well as in JCR query language. It offers also features like version support and object locking.