My personal pet peeve is bean validation. The goals of the API are laudable, but the fact that the implementation is annotation-driven drives me nuts. Annotati

My personal pet peeve is bean validation. The goals of the API are laudable, but the fact that the implementation is annotation-driven drives me nuts. Annotations are fine for intra-project code contracts, but using them for external validation means that if you, say, deploy on a application server with an older version of Jersey, you're suddenly SOL when none of your validation logic is executed.