Get data from Jazz Warehause in Java Code.

Hi,
I would like to get data from warhause tables like WORKITEMS_SNAPSHOT using Java Code.

Now we are getting data through BIRT raport using Eclipse plugins.
We have BIRT raport designer and we create Data Sources.
We are using Jazz Data Source.

Is there any opportunity to get data from Jazz Data Source ( warehouse snapshots ) without BIRT ?

We want to avoid BIRT because we have problem with establish connection with Jazz Data Source.

Any help will be appreciate.
Arek