We currently do not allow writing of custom adapters. We can integrate through many components through multiple means including adapters, CLIs, web services, XMLs, etc.
You should be able to look at your install of CPO and see all the current adapters or refer to your CPO documentation.
If you are a customer and want more information please open a TAC case.
thanks,
Shaun Roberts
CPO/CIAC Support Team Lead
--Shaun Roberts
Principal Engineer, CX
shaurobe@cisco.com