I'm developing a app in Google app Engine with GWT and GXT so i don't know how create a PDF report. I am new in GAE and i understand that JasperReports, BIRT, iText, etc don't run in GAE for white-list. What Framework or lib can i to use?. I am using RPC Services.
Bruno Lowagie from iText recently mentioned a GAE compatible port of iText: http://www.parleys.com/#id=3147&st=5
I haven't looked into it, but maybe this could be interesting for you.