Is there a JDO implementation with flat files?

Question

I have a simple application that I would like to use JDO. But I do not want to use any kind of database, just a regular file system. Before jdo, I had this class, it serializes its object to a file, while the file name is the "primary key". I would like to be able to do the same with JDO. Is it possible?

Answer 1

Link Implementation for JDO 1.0 uses flat files. Take a look at Apache JDO, which should contain the source files.

Answer 2

Perhaps DataNucleus is the choice for you, as it supports various types of storage. xml storage plugin or built-in db4o database storage plugin may be an option, but both use one file for all objects instead of one file for each object.

Answer 3

Some time ago, I used the JDO 1.0.1 implementation and worked great for my simple cases.