How to call Stored Procedure which returns ref cursor from Jaspersoft studio 6.0.1

Hi Team, 

There is a requirement where I need to convert a stored procedure into jasper report? The procedure has few input parameters and an output parameter which is a ref cursor. There are many if else , for loop , multiple dynamic queries , 2-3 cursors . So, due to the complexity involved, thought of calling the stored procedure from jaspersoft studio?

Could you please let me know, how can I achieve it?

Thanks in Advance.