The Diff class

• More detailed comparisons

• Can compare:

  public Diff(String control, String test) throws SAXException, IOException, ParserConfigurationException
  public Diff(Reader control, Reader test) throws SAXException, IOException, ParserConfigurationException
  public Diff(Document controlDoc, Document testDoc)
  public Diff(String control, Transform testTransform) throws IOException, TransformerException, ParserConfigurationException, SAXException
  public Diff(InputSource control, InputSource test) throws SAXException, IOException, ParserConfigurationException
  public Diff(DOMSource control, DOMSource test)

• Distinguishes between similarity and identity:

  public boolean similar()
  public boolean identical()

• Supports custom rules through configurable DifferenceEngine and ElementQualifier:

  public Diff(Document controlDoc, Document testDoc, DifferenceEngine comparator)
  public Diff(Document controlDoc, Document testDoc, DifferenceEngine comparator, ElementQualifier elementQualifier)
  
  public void overrideDifferenceListener(DifferenceListener delegate)
  public void overrideElementQualifier(ElementQualifier delegate)