private String diffHtml()

in src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocLoader.java [235:274]
34 lines of code
4 McCabe index (conditional complexity)

  private String diffHtml(String htmlA, String htmlB, DiffMode diffMode)
      throws IOException, TransformerConfigurationException, SAXException,
          ResourceNotFoundException {
    ByteArrayOutputStream htmlDiff = new ByteArrayOutputStream();

    SAXTransformerFactory tf = (SAXTransformerFactory) TransformerFactory.newInstance();
    TransformerHandler result = tf.newTransformerHandler();
    result.setResult(new StreamResult(htmlDiff));

    String htmlHeader = "com/googlesource/gerrit/plugins/xdocs/diff/htmlheader-";
    switch (diffMode) {
      case SIDEBYSIDE_A:
        htmlHeader += "sidebyside-a.xsl";
        break;
      case SIDEBYSIDE_B:
        htmlHeader += "sidebyside-b.xsl";
        break;
      case UNIFIED:
        htmlHeader += "unified.xsl";
        break;
      default:
        log.error(String.format("Unsupported diff mode: %s", diffMode.name()));
        throw new ResourceNotFoundException();
    }

    ContentHandler postProcess = new XslFilter().xsl(result, htmlHeader);
    postProcess.startDocument();
    postProcess.startElement("", "diffreport", "diffreport", new AttributesImpl());
    postProcess.startElement("", "diff", "diff", new AttributesImpl());

    HtmlSaxDiffOutput output = new HtmlSaxDiffOutput(postProcess, "diff");
    HTMLDiffer differ = new HTMLDiffer(output);
    differ.diff(getComparator(htmlA), getComparator(htmlB));

    postProcess.endElement("", "diff", "diff");
    postProcess.endElement("", "diffreport", "diffreport");
    postProcess.endDocument();

    return fixStyles(htmlDiff.toString(UTF_8.name()));
  }