Example usage for org.w3c.dom.traversal TreeWalker nextNode

Introduction

In this page you can find the example usage for org.w3c.dom.traversal TreeWalker nextNode.

Prototype

public Node nextNode();

Source Link

Document

Moves the TreeWalker to the next visible node in document order relative to the current node, and returns the new node.

Usage

From source file:DemoTreeWalker.java

public static void main(String args[]) throws SAXException, IOException {

    DOMParser parser = new DOMParser();
    parser.parse("games.xml");

    Document doc = parser.getDocument();

    DocumentTraversal docTraversal = (DocumentTraversal) doc;

    TreeWalker iter = docTraversal.createTreeWalker(doc.getDocumentElement(), NodeFilter.SHOW_ALL, null, false);
    Node n = null;//from  w ww.ja v  a 2  s . c  om
    while ((n = iter.nextNode()) != null) {
        System.out.println("Node name: " + n.getNodeName());
        System.out.println("Node value: " + n.getNodeValue());
    }

}

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From source file:org.apache.any23.extractor.microdata.MicrodataParser.java

/**
 * Returns all the <b>itemprop</b>s for the given <b>itemscope</b> node.
 *
 * @param scopeNode node representing the <b>itemscope</b>
 * @param skipRoot if <code>true</code> the given root <code>node</code>
 *        will be not read as a property, even if it contains the <b>itemprop</b> attribute.
 * @return the list of <b>itemprop</b>s detected within the given <b>itemscope</b>.
 * @throws MicrodataParserException if an error occurs while retrieving an property value.
 *///  w w w .  j a  va 2 s .co m
public List<ItemProp> getItemProps(final Node scopeNode, boolean skipRoot) throws MicrodataParserException {
    final Set<Node> accepted = new LinkedHashSet<>();

    if (!skipRoot) {
        NamedNodeMap attributes = scopeNode.getAttributes();
        if (attributes.getNamedItem(ITEMPROP_ATTRIBUTE) != null) {
            accepted.add(scopeNode);
        }
    }

    // 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)) {
                            accepted.add(node);
                        }

                        if (attributes.getNamedItem(ITEMSCOPE_ATTRIBUTE) != null) {
                            // Don't visit descendants of nodes that define a new scope
                            return FILTER_REJECT;
                        }
                    }
                    return FILTER_ACCEPT;
                }
            }, false);

    // To populate accepted we only need to walk the tree.
    while (treeWalker.nextNode() != null)
        ;

    final List<ItemProp> result = new ArrayList<>();
    for (Node itemPropNode : accepted) {
        final String itemProp = DomUtils.readAttribute(itemPropNode, ITEMPROP_ATTRIBUTE, null);

        if (StringUtils.isBlank(itemProp)) {
            manageError(new MicrodataParserException("invalid property name '" + itemProp + "'", itemPropNode));
            continue;
        }

        final String[] propertyNames = itemProp.trim().split("\\s+");
        ItemPropValue itemPropValue;
        for (String propertyName : propertyNames) {
            try {
                itemPropValue = getPropertyValue(itemPropNode);
            } catch (MicrodataParserException mpe) {
                manageError(mpe);
                continue;
            }
            result.add(new ItemProp(DomUtils.getXPathForNode(itemPropNode), propertyName, itemPropValue));
        }
    }
    return result;
}

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