return revisionTimestamp;
}
public ParsePage invoke() throws JDOMException, IOException {
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(new ByteArrayInputStream(pageString.getBytes()));
pageTitle = textToString(titleXPath.evaluateFirst(doc));
wikitext = textToString(textXPath.evaluate(doc));
sourceUrl = "http://en.wikipedia.org/wiki/" + pageTitle;
String revisionTimestampString = textToString(revisionTimestampXPath.evaluateFirst(doc));
revisionTimestamp = null;