Examples of org.w3c.dom.traversal.NodeIterator

org.w3c.dom.traversal.NodeIterator
NodeIterators are used to step through a set of nodes, e.g. the set of nodes in a NodeList, the document subtree governed by a particular node, the results of a query, or any other set of nodes. The set of nodes to be iterated is determined by the implementation of the NodeIterator. DOM Level 2 specifies a single NodeIterator implementation for document-order traversal of a document subtree. Instances of these iterators are created by calling DocumentTraversal.createNodeIterator(). @since DOM Level 2

    public NodeIterator createNodeIterator(Node root,
                                           int whatToShow,
                                           NodeFilter filter,
                                           boolean entityReferenceExpansion)
    {
        NodeIterator iterator = new NodeIteratorImpl(this,
                                                     root,
                                                     whatToShow,
                                                     filter,
                                                     entityReferenceExpansion);
        if (iterators == null) {

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                    throw new RuntimeException("The document [" + source
                            + "] doesn't contain any XML content.");
                }


                for (int i = 0; i < xPaths.length; i++) {
                    NodeIterator iter = XPathAPI.selectNodeIterator(xml, xPaths[i]);
                    Node node;
                    while ((node = iter.nextNode()) != null) {
                        Attr attr = (Attr) node;
                        String uri = attr.getValue();
                        if (isLinkUri(uri)) {
                            links.add(new Link(uri));
                        }

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      fragment.appendChild(fragment.getOwnerDocument().createTextNode("\n"));
      fragment.appendChild(template.cloneNode(true));
      fragment.appendChild(fragment.getOwnerDocument().createTextNode("\n"));


      // fetch list of referenced modes
      NodeIterator ii = dt.createNodeIterator(template, 
        NodeFilter.FILTER_ACCEPT, 
        new ModeFilter(), false);
      Node oo;
      while((oo = ii.nextNode()) != null) {
        Element ee = (Element) oo;
        modes.add(ee.getAttribute("mode"));
      }
      for(String mm : modes) {
        // get a list of all modes referred to
        NodeIterator jj = dt.createNodeIterator(templateLibrary, 
            NodeFilter.FILTER_ACCEPT, 
            new ModeTemplateFilter(mm), false);
        Node pp;
        while((pp = jj.nextNode()) != null) {
          fragment.appendChild(
            loadTemplateRecurse((Element) pp, templatesLoaded));
        }
       }
      
      ii = dt.createNodeIterator(template, 
          NodeFilter.FILTER_ACCEPT, 
          new CallTemplateFilter(), false);
      while((oo = ii.nextNode()) != null) {
        Element el = (Element) oo;
        String n = el.getAttribute("name");
        NodeIterator it = dt.createNodeIterator(templateLibrary, 
          NodeFilter.FILTER_ACCEPT, 
          new TemplateFilter(n), false);
        Element ee;
        while((ee = (Element) it.nextNode()) != null) {
          fragment.appendChild(
              loadTemplateRecurse(ee, templatesLoaded));
        }
      }

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  }


  public boolean loadTemplate(Element stylesheet, String name) {
    
    DocumentTraversal dt = (DocumentTraversal)templateLibrary;
    NodeIterator it = dt.createNodeIterator(templateLibrary, 
        NodeFilter.FILTER_ACCEPT, 
      new TemplateFilter(name), false);
    
    DocumentFragment fragment = templateLibrary.createDocumentFragment();
    Node nn;
    @SuppressWarnings("unchecked")
    Set<String> templatesLoaded = (Set<String>) stylesheet.getUserData("external-stylesheets");
    if(templatesLoaded == null) {
      templatesLoaded = new HashSet<String>();
      stylesheet.setUserData("external-stylesheets",templatesLoaded,null);
    }
    
    boolean loaded = false;
    while((nn = it.nextNode())!= null) {
      loaded = true;
      fragment.appendChild(
        loadTemplateRecurse((Element)nn, templatesLoaded));
    }
    stylesheet.getOwnerDocument().adoptNode(fragment);

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      try
            {
        File f = new File(s);
              Document document = builder.parse(f);
              DocumentTraversal dt = (DocumentTraversal) document;
              NodeIterator it = dt.createNodeIterator(document, 
                NodeFilter.FILTER_ACCEPT, new AnyTemplateFilter(), false);
              Node n;
              while((n = it.nextNode()) != null) {
                this.addTemplate((Element)n);
              }
            } catch (Exception e)
            {
              e.printStackTrace();

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      fragment.appendChild(fragment.getOwnerDocument().createTextNode("\n"));
      fragment.appendChild(template.cloneNode(true));
      fragment.appendChild(fragment.getOwnerDocument().createTextNode("\n"));


      // fetch list of referenced modes
      NodeIterator ii = dt.createNodeIterator(template, 
        NodeFilter.FILTER_ACCEPT, 
        new ModeFilter(), false);
      Node oo;
      while((oo = ii.nextNode()) != null) {
        Element ee = (Element) oo;
        modes.add(ee.getAttribute("mode"));
      }
      for(String mm : modes) {
        // get a list of all modes referred to
        NodeIterator jj = dt.createNodeIterator(templateLibrary, 
            NodeFilter.FILTER_ACCEPT, 
            new ModeTemplateFilter(mm), false);
        Node pp;
        while((pp = jj.nextNode()) != null) {
          fragment.appendChild(
            loadTemplateRecurse((Element) pp, templatesLoaded));
        }
       }
      
      ii = dt.createNodeIterator(template, 
          NodeFilter.FILTER_ACCEPT, 
          new CallTemplateFilter(), false);
      while((oo = ii.nextNode()) != null) {
        Element el = (Element) oo;
        String n = el.getAttribute("name");
        NodeIterator it = dt.createNodeIterator(templateLibrary, 
          NodeFilter.FILTER_ACCEPT, 
          new TemplateFilter(n), false);
        Element ee;
        while((ee = (Element) it.nextNode()) != null) {
          fragment.appendChild(
              loadTemplateRecurse(ee, templatesLoaded));
        }
      }

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  }


  public boolean loadTemplate(Element stylesheet, String name) {
    
    DocumentTraversal dt = (DocumentTraversal)templateLibrary;
    NodeIterator it = dt.createNodeIterator(templateLibrary, 
        NodeFilter.FILTER_ACCEPT, 
      new TemplateFilter(name), false);
    
    DocumentFragment fragment = templateLibrary.createDocumentFragment();
    Node nn;
    @SuppressWarnings("unchecked")
    Set<String> templatesLoaded = (Set<String>) stylesheet.getUserData("external-stylesheets");
    if(templatesLoaded == null) {
      templatesLoaded = new HashSet<String>();
      stylesheet.setUserData("external-stylesheets",templatesLoaded,null);
    }
    
    boolean loaded = false;
    while((nn = it.nextNode())!= null) {
      loaded = true;
      fragment.appendChild(
        loadTemplateRecurse((Element)nn, templatesLoaded));
    }
    stylesheet.getOwnerDocument().adoptNode(fragment);

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      try
            {
        File f = new File(s);
              Document document = builder.parse(f);
              DocumentTraversal dt = (DocumentTraversal) document;
              NodeIterator it = dt.createNodeIterator(document, 
                NodeFilter.FILTER_ACCEPT, new AnyTemplateFilter(), false);
              Node n;
              while((n = it.nextNode()) != null) {
                this.addTemplate((Element)n);
              }
            } catch (Exception e)
            {
              e.printStackTrace();

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          else
          {
            System.out.println(" found!  name = " + mynode.getNodeName());
          }


          NodeIterator nit = pathIterator((DocumentTraversal) impl, impl,
                path);
          int counter = 0;
          while (nit.nextNode() != null)
          {
            ++counter;
          }
          System.out.println("found " + counter + " nodes for path "
                + line);

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    embed.setAttribute("height",element.getAttribute("height"));
    embed.setAttribute("src",value);
    newElement.setAttribute("dx:attr","src:" + value);


    DocumentTraversal tr = (DocumentTraversal)document;
    NodeIterator it = tr.createNodeIterator(
        element, NodeFilter.FILTER_ACCEPT, 
        new ParamFilter(), false);


    Element n;
    while((n = (Element)it.nextNode()) != null) {
      newElement.appendChild(n.cloneNode(false));
      embed.setAttribute(n.getAttribute("name"),
        n.getAttribute("value"));
    }

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