Hi, there.
In my application I need to know when a DOM tree is changed. As there is a
nice event model since DOM level 2, I tried to use that. But whatever I try,
there are no events fired, although the tree gets changed. Can someone shed
some light on this, or provide me a little example?
The code I wrote so far uses Xerces 1.4.1 and looks like this, and I expect
it to throw an exception but it does not:
public class DomEventDemo implements org.w3c.dom.events.EventListener {
public DomEventDemo() {
}
public static void main(String[] args) throws Exception {
org.w3c.dom.Document doc = chaudhuri.util.DOMUtil.parseString("<?xml
version=\"1.0\"?><test attribut=\"1\"/>");
if(doc instanceof org.apache.xerces.dom.DocumentImpl) {
((org.apache.xerces.dom.DocumentImpl)doc).setMutationEvents(true);
((org.w3c.dom.events.EventTarget)doc).addEventListener("MutationEvents", new
DomEventDemo(), false);
}
System.out.println("Vorher: "+chaudhuri.util.DOMUtil.toXML(doc));
org.w3c.dom.Node attr =
org.apache.xpath.XPathAPI.selectSingleNode(doc, "/test/@attribut");
attr.setNodeValue("2");
System.out.println("Nachher: "+chaudhuri.util.DOMUtil.toXML(doc));
}
public void handleEvent(org.w3c.dom.events.Event event) {
throw new UnsupportedOperationException();
}
}
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