If your project demands you to persist java objects in any environment (J2EE etc), use standards but switch to any standards such as JDO, EJB, Hibernate anytime,
use default mapping for build from the scratch apps "EasyPersistence" is your solution
Java disk/CD/DVD/HD/whatever cataloguer designed to allow the storage and search of different types of data. Hibernate or JDO will be used for catalog storage and maybe some native functions for volume data retrieval (serial and label).
JellyFish is a toolkit for persisting Java objects to LDAP. Its goals are similar to those of Java Data Objects(JDO), but it targets JNDI instead of JDBC. JellyFish has a built-in filesystem JNDI provider, so you do not need an LDAP server to try it.