Apply xsl for RSS

Hello Experts,

I want to apply XSL styles for RSS feed in portal application. I am looking this link for my reference.

In that,

1. I have Exception java.lang.ClassCastException for IXSLTransformService.

2. context.lookup("/broker/services/" looks where in portal application ?

3. rssStyleSheetURL = new URL("file://localhost/" +rssStyleSheetFileName);

4. any thing I want to in my Portalapp.xml

http://help.sap.com/saphelp_nw70/helpdata/en/42/9ddd0cbb211d72e10000000a1553f6/frameset.htm

How i can apply xsl in Rss Feed?

Thank you,

Regards,

Devasarathy Pandi.