Hello Sir,
I am a senior Java dveloper,and I have lots experience on ETL(extract data from datasource-trandformation-loading into another datasource),
I have checked the document you provided,I am comfident I can write this interface for you
you will get all right of the source code,and the data will never be discloured to 3rd party,
please consider my serioud bid
Thanks
Bing