Purging documents in BI 4.1 using SDK

Hello Friends,

Is it possible to purge a webi document in BI 4.1 with Web Intelligence SDK using java API?

I was able to formulate a piece of code but the following line doesn't work throwing the "feature is not implemented" error

DocumentInstance1.getDataProviders().getItem(i).purge();

This works in XI 3.1 but not BI 4.1; I wasn't able to find the definition of the purge method in any of the XI 3.1 classes. Any suggestions?

I know that with BI 4.1 RESTful Web Services is the way to go but I'm relatively new to the RESTful world and it might take me a long time to implement.

Regards,

-CF