I'm afraid that's pretty much up to Jasper. As far as I know, Jasper will generate its reports from a Jasper
servlet, not via JSF, which is too encumbered with its own concerns.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.