Getting the webapp name in Custom tag?

Hi,
I have a custom tag that dispalys some search results, and at the bottom of the results is a link to a controller servlet to go ad get more results to display. (Sounds bad I know but the search is very quick).
I would like this tag to be used in webapps of different names, and so need to know the web app name to build the link.
I can use pageContext.getRequest().getRealPath(""), and chop the webapp name off the end, but I was hoping for a nicer solution?
My Tag extends TagSupport.
Thanks
James

((HttpServletRequest) pageContext.getRequest()).getContextPath();

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