How to publish file?

[teknokrat]

I am writing some code to publish jars using a filesystem resolver for a 
plugin. So far I have tried

String path = IvyPatternHelper.substitute("", organisation, module, 
revision, "ivy", "ivy", "xml");
File ivyFile = new File(path);
if (!ivyFile.exists()) {
                IvyDeliver deliver = new IvyDeliver();
                deliver.setModule(module);
                deliver.setOrganisation(organisation);
                deliver.setRevision(revision);
                deliver.execute();
            }
This throws NPEs. How can I use the Ivy API to publish a jar file from a 
java program? What fields are mandatory and how do i add the 
configuration details? There does not appear to be any javadoc link on 
the main site.

cheers