public void exportIntroductionPuzzle(IntroductionPuzzle puzzle, OutputStream os)
throws TransformerException, ParserConfigurationException {
Document xmlDoc;
synchronized (
mDocumentBuilder) { // TODO: Figure out whether the DocumentBuilder is maybe synchronized
// anyway
xmlDoc = mDOM.createDocument(null, WebOfTrust.WOT_NAME, null);
}
// 1.0 does not support all Unicode characters which the String class supports. To prevent us
// from having to filter all Strings, we use 1.1
xmlDoc.setXmlVersion("1.1");
Element rootElement = xmlDoc.getDocumentElement();
// We include the WoT version to have an easy way of handling bogus XML which might be created
// by bugged versions.
rootElement.setAttribute("Version", Long.toString(Version.getRealVersion()));
Element puzzleElement = xmlDoc.createElement("IntroductionPuzzle");
puzzleElement.setAttribute(
"Version",
Integer.toString(INTRODUCTION_XML_FORMAT_VERSION)); /* Version of the XML format */
// This lock is actually not necessary because all values which are taken from the puzzle are
// final. We leave it here just to make sure that it does
// not get lost if it becomes necessary someday.
synchronized (puzzle) {
puzzleElement.setAttribute("ID", puzzle.getID());
puzzleElement.setAttribute("Type", puzzle.getType().toString());
puzzleElement.setAttribute("MimeType", puzzle.getMimeType());
synchronized (mDateFormat) {
puzzleElement.setAttribute("ValidUntil", mDateFormat.format(puzzle.getValidUntilDate()));
}
Element dataElement = xmlDoc.createElement("Data");
dataElement.setAttribute("Value", Base64.encodeStandard(puzzle.getData()));
puzzleElement.appendChild(dataElement);
}
rootElement.appendChild(puzzleElement);
DOMSource domSource = new DOMSource(xmlDoc);
StreamResult resultStream = new StreamResult(os);
synchronized (mSerializer) {
mSerializer.transform(domSource, resultStream);
}
}
