I'd like to know if there's a way in PDI to implement its own named parameters or variables provider. What I'd like to have is a kind of java callback that I could implement in order to feed PDI with variables coming from my own repository (database, file....). Of course I could write a specific transformation for this (like described for example here: http://forums.pentaho.com/showthread...eters+provider) but I'm wondering if there's a way to implement this directly in java by implementing an api.