Java APIs

I am looking for a way to implement a java program as a cifs share - much the way Alfresco does. I have found JCIFS and JLAN, but I am not sure if this is what I need or if there are any other packages/libraries that do the same thing. Essentially, I need/want a package the defines the protocol and allows me to tie in my own code to the function calls. We have this service with an api that allows us to list files in a directory, download them, upload them, etc. I want to map these function calls to a cifs/smb interface. I have googled and havent found much, other than JCIFS and JLAN, and from what I have read, these are full implementations of the protocol and are not customizable in the manner I need it to be. I have found books that I can purchase to learn about the CIFS protocol; however, any online references would be preferable and a package that has already been developed would be ideal.

Thanks in advance for any help