How to get first name and last name in Custom PrePopulate Plugin for Request Dataset

Hi,

I have Develop a Custom PrePopulate Plugin for OIM 11g R1 Request Data set following the Document ID 1453529.1. It is working fine for my AD Request data set. My requirement is to develop a pre-populate plugin which populate the mail address in the request data set base on first name and last name.

For example user First name is Tamim and Last name is Khan, then the email address should be tamim.khan@domain.com and it will also validate the email address exist in the exchange system or not. Not that I have recon all exchange user in OIM. So I have all the email address in OIM database where I can check the email address.