Adding links to a document

I'm new to using batik, and I want to turn all text elements in an 
SVGDocument into links which pass the text to a callback. Can you point 
me to an example of something similar? I'm finding the text elements 
like this:

SVGDocument doc = ...
Element svgRoot = doc.getDocumentElement();
NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
Node n;
for(int i=0;i<labels.getLength();i++) {
   n = labels.item(i);
   log.info("A label:"+n.getFirstChild().getNodeValue());
   //presumably, replace n with a link element that contains n?
}

Thanks in advance,

Jim

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