List of usage examples for org.w3c.dom.traversal NodeFilter FILTER_REJECT
short FILTER_REJECT
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From source file:DOMTreeWalkerTreeModel.java
/** * This main() method demonstrates the use of this class, the use of the * Xerces DOM parser, and the creation of a DOM Level 2 TreeWalker object. */// w w w .j av a2 s . co m public static void main(String[] args) throws IOException, SAXException { // Obtain an instance of a Xerces parser to build a DOM tree. // Note that we are not using the JAXP API here, so this // code uses Apache Xerces APIs that are not standards DOMParser parser = new org.apache.xerces.parsers.DOMParser(); // Get a java.io.Reader for the input XML file and // wrap the input file in a SAX input source Reader in = new BufferedReader(new FileReader(args[0])); InputSource input = new org.xml.sax.InputSource(in); // Tell the Xerces parser to parse the input source parser.parse(input); // Ask the parser to give us our DOM Document. Once we've got the DOM // tree, we don't have to use the Apache Xerces APIs any more; from // here on, we use the standard DOM APIs Document document = parser.getDocument(); // If we're using a DOM Level 2 implementation, then our Document // object ought to implement DocumentTraversal DocumentTraversal traversal = (DocumentTraversal) document; // For this demonstration, we create a NodeFilter that filters out // Text nodes containing only space; these just clutter up the tree NodeFilter filter = new NodeFilter() { public short acceptNode(Node n) { if (n.getNodeType() == Node.TEXT_NODE) { // Use trim() to strip off leading and trailing space. // If nothing is left, then reject the node if (((Text) n).getData().trim().length() == 0) return NodeFilter.FILTER_REJECT; } return NodeFilter.FILTER_ACCEPT; } }; // This set of flags says to "show" all node types except comments int whatToShow = NodeFilter.SHOW_ALL & ~NodeFilter.SHOW_COMMENT; // Create a TreeWalker using the filter and the flags TreeWalker walker = traversal.createTreeWalker(document, whatToShow, filter, false); // Instantiate a TreeModel and a JTree to display it JTree tree = new JTree(new DOMTreeWalkerTreeModel(walker)); // Create a frame and a scrollpane to display the tree, and pop them up JFrame frame = new JFrame("DOMTreeWalkerTreeModel Demo"); frame.getContentPane().add(new JScrollPane(tree)); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); frame.setSize(500, 250); frame.setVisible(true); }