File	Doc	Category	Size	Date	Package
SAXTreeViewer.java	API Doc	Example	24233	Thu Aug 16 16:42:30 BST 2001	javaxml2

SAXTreeViewer

• java.lang.Object
  • java.awt.Component
    • java.awt.Container
      • java.awt.Window
        • java.awt.Frame
          • javax.swing.JFrame

Fields Summary
private String	vendorParserClass Default parser to use
private JTree	jTree The base tree to render
DefaultTreeModel	defaultTreeModel Tree model to use

Constructors Summary
public SAXTreeViewer() This initializes the needed Swing settings. // Handle Swing setup super("SAX Tree Viewer"); setSize(600, 450);

Methods Summary
public void	buildTree(javax.swing.tree.DefaultTreeModel treeModel, javax.swing.tree.DefaultMutableTreeNode base, java.lang.String xmlURI) This handles building the Swing UI tree. param treeModel Swing component to build upon. param base tree node to build on. param xmlURI URI to build XML document from. throws IOException - when reading the XML URI fails. throws SAXException - when errors in parsing occur. // Create instances needed for parsing XMLReader reader = XMLReaderFactory.createXMLReader(vendorParserClass); XMLWriter writer = new XMLWriter(reader, new FileWriter("snapshot.xml")); NamespaceFilter filter = new NamespaceFilter(writer, "http://www.oreilly.com/javaxml2", "http://www.oreilly.com/catalog/javaxml2"); ContentHandler jTreeContentHandler = new JTreeContentHandler(treeModel, base, reader); ErrorHandler jTreeErrorHandler = new JTreeErrorHandler(); // Register content handler filter.setContentHandler(jTreeContentHandler); // Register error handler filter.setErrorHandler(jTreeErrorHandler); // Register entity resolver filter.setEntityResolver(new SimpleEntityResolver()); // Register lexical handler filter.setProperty( "http://xml.org/sax/properties/lexical-handler", jTreeContentHandler); // Register declaration handler filter.setProperty( "http://xml.org/sax/properties/declaration-handler", new MyDeclHandler()); // Parse InputSource inputSource = new InputSource(xmlURI); filter.parse(inputSource);
public void	init(java.lang.String xmlURI) This will construct the tree using Swing. param filename String path to XML document. DefaultMutableTreeNode base = new DefaultMutableTreeNode("XML Document: " + xmlURI); // Build the tree model defaultTreeModel = new DefaultTreeModel(base); jTree = new JTree(defaultTreeModel); // Construct the tree hierarchy buildTree(defaultTreeModel, base, xmlURI); // Display the results getContentPane().add(new JScrollPane(jTree), BorderLayout.CENTER);
public static void	main(java.lang.String[] args) Static entry point for running the viewer. try { if (args.length != 1) { System.out.println( "Usage: java javaxml2.SAXTreeViewer " + "[XML Document URI]"); System.exit(0); } SAXTreeViewer viewer = new SAXTreeViewer(); viewer.init(args[0]); viewer.setVisible(true); } catch (Exception e) { e.printStackTrace(); }
private void	setNamespaceProcessing(org.xml.sax.XMLReader reader, boolean state) reader.setFeature( "http://xml.org/sax/features/namespaces", state); reader.setFeature( "http://xml.org/sax/features/namespace-prefixes", !state);