Want tree implementaion on Tree through XMl

I need to put XMl as a datasource for HierchicalContainer .the xml is of this type

<?xml version="1.0"?> mac 2 windows 29 xp 28 and in UI i need to show tree with struxcture as ipaddressgroup --ipAddress ----devicename ----deviceValue.

as i am new to vaadin ,i am not able to populate the value in tree using xml .Please help me on this .