How to launch pdf javascript controls in java

Hello,
Here is my problem.
We have a pdf (acroform) with controls in javascript on many fields.
We have an xml with data to fill in the acroform.
We made a java program, with the iText lib, to fill the pdf acroform with the xml. It's working fine, except that the javascript control are not launched. So if there is a problem in the xml, the pdf is wronlgy filled in.
Is there a way, to launch the javascript controls in java? What library to use??
Thank you, (sorry if my english is not good).

Yes, it's server-side pb. The thing is, I don't really know what technology / library we can use to deal with this problem.
If you have any idea that coul guide me...

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