Recommended solutions to use PGP-compatible file encryption from a Java app running on Linux?

I need to replace an existing application that, among other things, will need to encrypt/decrypt/sign messages and files in a manner compatible with PGP Desktop.

The new application is written in Java (JDK 1.6) and will run on Linux.

After surveying what's available, I see BouncyCastle supports 开发者_运维知识库OpenPGP. Otherwise, JCE doesn't come with a PGP-compatible installation.

Calling the official command line client from PGP as an external process is something I would like to avoid as much as possible (and it costs thousands of Dollars).

Are there any other options or this is it?

Thanks.

DidiSoft sells OpenPGP Library for Java.

Cryptix is another option, but it looks like the project was abandoned in 2005. The Cryptix website recommends Bouncy Castle instead.