How to Save attachments in BOPF

Hi,

We have a requirement to attach a file and saving the same in database. The flow is as below.

UI5-->Odata-->BOPF.  I have gone through the document (http://scn.sap.com/docs/DOC-46279) and created delegation node and added the Attachment folder BO. How to connect it to Odata and what else has to be done in BO. Please could any one help me.

Thanks and Regards,

Pushpa