Examples of org.w3c.dom.traversal.NodeFilter

org.w3c.dom.traversal.NodeFilter
Filters are objects that know how to "filter out" nodes. If a NodeIterator or TreeWalker is given a filter, it applies the filter before it returns the next node. If the filter says to accept the node, the iterator returns it; otherwise, the iterator looks for the next node and pretends that the node that was rejected was not there.
The DOM does not provide any filters. Filter is just an interface that users can implement to provide their own filters.
Filters do not need to know how to iterate, nor do they need to know anything about the data structure that is being iterated. This makes it very easy to write filters, since the only thing they have to know how to do is evaluate a single node. One filter may be used with a number of different kinds of iterators, encouraging code reuse. This is an ECMAScript function reference. This method returns ashort . The parameter is of type Node . @since DOM Level 2

   * Parses pipelined data out of a Document.
   */
  Map<PipelinedData, Node> parsePipelinedData(Gadget gadget, Document doc) {
    NodeIterator nodeIterator = ((DocumentTraversal) doc)
        .createNodeIterator(doc, NodeFilter.SHOW_ELEMENT,
            new NodeFilter() {
              public short acceptNode(Node n) {
                if ("script".equalsIgnoreCase(n.getNodeName()) &&
                    "text/os-data".equals(((Element) n).getAttribute("type"))) {
                  return NodeFilter.FILTER_ACCEPT;
                }

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  }


  private List<Element> getScripts(final String type) {
    NodeIterator nodeIterator = ((DocumentTraversal) document)
    .createNodeIterator(document, NodeFilter.SHOW_ELEMENT,
        new NodeFilter() {
          public short acceptNode(Node n) {
            if ("script".equalsIgnoreCase(n.getNodeName()) &&
                type.equals(((Element) n).getAttribute("type"))) {
              return NodeFilter.FILTER_ACCEPT;
            }

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        assertEquals(NodeFilter.SHOW_COMMENT, tw.getWhatToShow());
        assertEquals(null, tw.nextNode());
    }


    public void testFilter() throws Exception {
        NodeFilter nf = new NodeFilter() {
            public short acceptNode(Node node) {
                if ("b".equals(node.getNodeName()) || "f".equals(node.getNodeName())) {
                    return NodeFilter.FILTER_ACCEPT;
                }
                return NodeFilter.FILTER_SKIP;

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    public final NodeList getElementsByTagNameNS(final String namespaceURI, final String localName) {
        checkLoaded();
        NodeListImpl list = new NodeListImpl(this);


        NodeFilter filter = new NodeFilter() {
            public short acceptNode(Node node) {
                if (node.getLocalName().equals(localName) && node.getNamespaceURI().equals(namespaceURI)) {
                    return NodeFilter.FILTER_ACCEPT;
                } else {
                    return NodeFilter.FILTER_SKIP;

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            }
        }


        // TreeWalker to walk DOM tree starting with the scopeNode. Nodes maybe visited multiple times.
        TreeWalker treeWalker = ((DocumentTraversal) scopeNode.getOwnerDocument())
            .createTreeWalker(scopeNode, NodeFilter.SHOW_ELEMENT, new NodeFilter() {
            @Override
            public short acceptNode(Node node) {
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    NamedNodeMap attributes = node.getAttributes();
                    if (attributes.getNamedItem(ITEMPROP_ATTRIBUTE) != null && !scopeNode.equals(node)) {

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        final List<Node> result = new ArrayList<Node>();
        NodeIterator nodeIterator = documentTraversal.createNodeIterator(
                root,
                NodeFilter.SHOW_ELEMENT,
                new NodeFilter() {
                    @Override
                    public short acceptNode(Node node) {
                        if (node.getNodeType() == Node.ELEMENT_NODE) {
                            if (tagName != null && !tagName.equals("*") && !tagName.equals(node.getNodeName())) {
                                // tagName given but doesn't match.

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            }
        }


        // TreeWalker to walk DOM tree starting with the scopeNode. Nodes maybe visited multiple times.
        TreeWalker treeWalker = ((DocumentTraversal) scopeNode.getOwnerDocument())
            .createTreeWalker(scopeNode, NodeFilter.SHOW_ELEMENT, new NodeFilter() {
            @Override
            public short acceptNode(Node node) {
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    NamedNodeMap attributes = node.getAttributes();
                    if (attributes.getNamedItem(ITEMPROP_ATTRIBUTE) != null && !scopeNode.equals(node)) {

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  public static List<Element> getElementsByTagNameCaseInsensitive(Document doc,
      final Set<String> lowerCaseNames) {
    final List<Element> result = Lists.newArrayList();
    NodeIterator nodeIterator = ((DocumentTraversal) doc)
        .createNodeIterator(doc, NodeFilter.SHOW_ELEMENT,
            new NodeFilter() {
              public short acceptNode(Node n) {
                if (lowerCaseNames.contains(n.getNodeName().toLowerCase())) {
                  return NodeFilter.FILTER_ACCEPT;
                }
                return NodeFilter.FILTER_REJECT;

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                XRLog.general(Level.FINE, "null text node");
            }


            final Range acceptRange = docRange.createRange();
            final Range tr = range;
            NodeFilter f = new NodeFilter() {
                public short acceptNode(Node n) {
                    acceptRange.setStart(n, 0);
                    if (tr.getStartContainer() == n) {
                        return FILTER_ACCEPT;
                    }

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                  input.getOctetStream());
            DocumentTraversal dt = ((DocumentTraversal) doc);
            Node rootNode = (Node) doc;


            // we accept all nodes
            NodeFilter nodefilter = new AlwaysAcceptNodeFilter();
            TreeWalker treewalker = dt.createTreeWalker(rootNode,
                                                        NodeFilter.SHOW_ALL,
                                                        nodefilter, true);
            StringBuffer sb = new StringBuffer();

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