Java Powerpoint Search and Replace API

[Domenick]

Does anyone know of an API, written in Java, that would allow me to
read a Powerpoint file from disk, find and replace some user entered
text in the file, and save that file to disk?

Jakarta's POI looks like it can only search, and the other solutions I
looked at had javadocs written German (which I don't understand). It
looks like Tonic Systems has a product which may do what I need, but I
would like to use an open source alternative. Thanks in advance.

- Domenick