How does this tool handle XFA forms?

Or I should ask how does any tool besides Adobe LiveCycle designer handles XFA. I've been using Apache Tika with Apache Solr to index PDF documents -- it worked quite well up until I tried to index XFA-based documents and got nothing, well I got metdatada, but not the content.

[pdftk](https://www.pdflabs.com/docs/pdftk-man-page/#dest-drop-xfa) seems to have an option called drop_xfa, which does just that.