Persistent data structures in Java

Question

Does anyone know a library or some at least some research on creating and using persistent data structures in Java? I don\'t refer to persistence as long term storage but persis

Answer 1

I implemented a few persistent data structures in Java. All open source (GPL) on Google code for anyone who is interested:

http://code.google.com/p/mikeralib/source/browse/#svn/trunk/Mikera/src/mikera/persistent

The main ones I have so far are:

• Persistent mutable test object
• Persistent hash maps
• Persistent vectors/lists
• Persistent sets (including a specialised persistent set of ints)