How to modify a document Field before the document is indexed?

[Joe Hansen]

Hey All,

I am using Apache Lucene (2.9.1) with PDFBox 0.8.0. The combination
works really great for our website.

I use the following command to create Lucent Document from a PDF file:
Document document =
org.apache.pdfbox.searchengine.lucene.LucenePDFDocument.getDocument(docFile);

Now, document, has a bunch of fields. Among those fields, is a field
named, "content". I need to add some more data to that field. For
example, I would like to add some description and keywords. How do I
go about doing that? Any pointers would be greatly welcome! :)

Thanks for your time!

Regards,
Joe