Reverse from an existing database

Hi, newbie to hibernate (and db's in general) here. we have this existing
mysql database and I am trying to use hibernate to provide a more rational
persistance layer. Towards that end, I would like to reverse the existing
database tables directly into java objects if possible. According to the
diagram at: http://hibernate.org/102.html, middlegen will do this. I
downloaded the sample, but it seems to be going the other way. Is there any
doc around on how to do this?

Any pointers will be appreciated.

Thanks



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