JasperReports how to make a chart with the 5 occurences that have the highest values?

I have some charts, now i need to create one that have the 5 atributes  that have more records on the database.

I have no idea, for now, of how to do it but send the parameters from the JFrame. But i think it must have a better way of doing that in the report itself.

Can someone help?Thanks