XML parsing (KXml) - how to save parser's position for later use?

Question

Hello.
I am parsing an xml file using KXmlParser and i want to keep the position of the parser for later use so i can continue from that same position.
int eventType = parser.getEventType();
        if (coupletForm!=null) {
            coupletForm.deleteAll();
        while (eventType != KXmlParser.END_DOCUMENT) {
            if (eventType == KXmlParser.START_TAG ){
                String element_name = parser.getName();
                if (element_name.equals("couplet")) {
                    coupletForm = new Form("Couplet 1");
                else if (element_name.equals("lead_one")) {
                    while (eventType != KXmlParser.TEXT || (eventType == KXmlParser.TEXT && parser.isWhitespace()) ){
                        eventType = parser.next();
                    //Now reached <description> element
                    coupletOptions = null;
                    coupletOptions = new ChoiceGroup("Choose lead:", Choice.EXCLUSIVE);
                    coupletOptions.append(parser.getText(), null);
                    parser_stack.push(parser);
                else if (element_name.equals("lead_two")) {
                    while (eventType != KXmlParser.TEXT || (eventType == KXmlParser.TEXT && parser.isWhitespace()) ){
                        eventType = parser.next();
                   //Now reached <description> element
                    coupletOptions.append(parser.getText(), null);                  
                    coupletForm.append(coupletOptions);                  
                    parser_stack.push(parser);
                    coupletForm.addCommand(CMD_NEXT);
                    coupletForm.setCommandListener(this);
                    display.setCurrent(coupletForm);
                    break;
            eventType = parser.next();
    }What i am doing here is parsing the xml file. When the parser finds an element with name <lead_one> it continues parsing until it finds the next element (<description>) and then creates a ChoiceGroup with the first option as the text found in the next element. I want to keep this position of the parser. The parser then continues until it finds element <lead_two> and does the same thing as <lead_one>. I want to save the positions of the parser when it stops at the <description> element. I am trying to do this using a stack, but this doesn't work.

Answer 1

If you want to select nodes based on changing criteria, you should use XPath.
If you have relatively fixed criteria, iterate over the nodes and pick out the ones that you want. For example:
  public static List<Element> getChildren(Element parent, String tagname) {
    List<Element> result = new ArrayList<Element>();
    NodeList children = parent.getChildNodes();
    for (int ii = 0 ; ii < children.getLength() ; ii++) {
      Node child = children.item(ii);
      if ((child.getNodeType() == Node.ELEMENT_NODE) && tagname.equals(child.getNodeName()) {
        result.add((Element)child);
    return result;
  }