Change By: Gunnar Morling (23/Nov/12 2:30 AM)
Description: Creating this issue as we spoke about the possibility to use  [  Jandex |https://github.com/jbossas/jandex]  a few times, so we have a one place for discussions.

Pro: 
* Fast meta-data retrieval when using pre-existing index

Con:
* Additional dependency
* Not so good documented

Implementation-wise it would make sense to implement this in form of another [MetaDataProvider|https://github.com/hibernate/hibernate-validator/blob/master/engine/src/main/java/org/hibernate/validator/internal/metadata/provider/MetaDataProvider.java].

We could also make meta data providers more pluggable, so we don't have a strict dependeny to this. The Jandex provider would then be plugged in under AS while in other scenarios the normal annotation-based provider would be used.
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