generating java/SQL script files from XML document

hi,
i have an xml document describing an object model ( with entities like 
employee, salary and business rules...). i want to convert this xml 
document into two kinds of files ( with a java programm ):
1/the java code ( .java) implementing the model
2/SQL script to generate the relational model related to my object model.
has anyone any experience on that ? what architecture would you advice ?
thx
raphaele

Raphaele Giordan
Sopra Group
Tel. :+33 (0)4 50 10 35 10 -