The aim of Mirage is to significantly reduce the time needed to deal with complex data storage. Indeed, during the development of i-Tor, programmers could create objects the way they saw fit, without worrying about how to store these objects in a database. Mirage is in production since it was released in i-Tor. For more information see the Open Source on SourceForge: Mirage:
"Mirage implements an complete 100% transparent Object Relational mapping for Java. It builds the database schema incrementally, to support incremental development and refactoring as it happens in Extreme Programming."