Invoke SOAP web service method

Hi,

I´m using JasperStudio and JasperReport Server v6.4.2

I have a SOAP web service method which given a date and a work shift, returns time in seconds since that date.   (An example of work_shift format: Mon - Fri { 7:30 am - 5:30 pm })
Currently i´m using a datasource which contains these 2 parameters as fields (date and workShift). 

I want to show in a report a field containing the result of calling this web service passing these 2 fields as parameters.

Is there any way to call a web service SOAP method passing input parameters from Jasper? 
Any guide would be appreciated.

Thanks,
GL.