Get Material from ABAP memory Project systems

Hi ,

I am working on creation of project system, WBS , network , activity and assignment of material to activity.

While saving WBS , I need to do some validation on user field based on material at activity level . I am using BADI WORKBREAKDOWN_UPDATE and method at_save for the same. Kindly help me to find material from memory. If project is already saved then I can find material from RESB , if not how can I retriev material .

Regards,

Sandeep