Hi Vijay,
The component usage ALV_TABLE will not appear in component usage tree on the left side.
You cannot do the context mapping by using enhancement as this is limitation.
You can set data to alv component through program.
use the method SET_DATA as below
wd_this->wd_cpifc_alv_table( )->set_data( r_node_data = your node name )
Please refer Mr. Thomas Jung's reply in the below thread
http://scn.sap.com/thread/1435054
Hope this helps you.
Regards,
Rama