Just adding that many people are looking for something more akin to managing whether certain conditions are met to enable or disable certain features in an application.
I grew tired of re-implementing the same pattern over and over everywhere I went, so I decided to make an OSS project for it called Roolie http://sourceforge.net/projects/roolie/
I just maven-ized it and since there have been no bugs reported since 2010 when it was released, I upgraded it to v 1.0 with no changes other than those required to host it at Maven Central (which i'm in the process of doing).
Basically JSR-94 is overkill for most things, and there is a huge learning curve and overhead that go along with the current offerings. That's fine if that's what you want. But if you just want to chain simple rules written in Java together with XML to maintain your state tests, Roolie is a very fast way to do it. No dependencies and no learning curve.
