Extract CSS using javaXPCOM

Hello,

I'm using javaXPCOM in my application and I want to retreive the CSS
(both inline and linked)

I managed retreiving the inline CSS unsing the nsIDOMDocumentStyle
Interface, but I couldn't get the CSS of a linked file here is my code
trunk for retreiving inline CSS :

for (int i = 0; i < documentStyle.getStyleSheets().getLength(); i++) {
					System.out.println(getSerializer().serializeToString(
							(documentStyle.getStyleSheets().item(i)
									.getOwnerNode())));
				}
}

when I use a linked CSS the getOwnerNode() method has only the link
value to the CSS document, and I don't know how I could do to have the
actual value

thank you for your help

regards