postProcess.startElement("", "diff", "diff", new AttributesImpl());
HtmlSaxDiffOutput output = new HtmlSaxDiffOutput(postProcess,
prefix);
SideBySideHTMLDiffer differ = new SideBySideHTMLDiffer(output);
differ.diff(leftComparator, rightComparator);
postProcess.endElement("", "diff", "diff");
postProcess.endElement("", "diffreport", "diffreport");
postProcess.endDocument();