XmlPull

package javaxml3;
import java.awt.BorderLayout;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
public class XmlPullTreeViewer extends JFrame {
 /** The base tree to render */
 private JTree jTree;
 /** Tree model to use */
 DefaultTreeModel defaultTreeModel;
 public XmlPullTreeViewer( ) {
 // Handle Swing setup
 super("XmlPull Tree Viewer");
 setSize(800, 450);
 // setSize(600, 200);
 }
 public void init(File file) throws XmlPullParserException, IOException {
 DefaultMutableTreeNode base = new DefaultMutableTreeNode(
 "XML Document: " + file.getAbsolutePath( ));
 // Build the tree model
 defaultTreeModel = new DefaultTreeModel(base);
 jTree = new JTree(defaultTreeModel);
 // Construct the tree hierarchy
 buildTree(defaultTreeModel, base, file);
 // Display the results
 getContentPane( ).add(new JScrollPane(jTree), BorderLayout.CENTER);
 }
 // Swing-related variables and methods, including
 // setting up a JTree and basic content pane
 public static void main(String[] args) {
 try {
 if (args.length != 1) {
 System.out.println("Usage: java javaxml3.XmlPullTreeViewer "
 + "[XML Document]");
 return;
 }
 XmlPullTreeViewer viewer = new XmlPullTreeViewer( );
 File f = new File(args[0]);
 viewer.init(f);
 viewer.setVisible(true);
 } catch (Exception e) {
 e.printStackTrace( );
 }
 }
 public void buildTree(DefaultTreeModel treeModel,
 DefaultMutableTreeNode current, File file)
 throws XmlPullParserException, IOException {
 FileInputStream inputStream = new FileInputStream(file);
 XmlPullParserFactory factory = XmlPullParserFactory.newInstance( );
 factory.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
 XmlPullParser parser = factory.newPullParser( );
 parser.setInput(inputStream, null);
 parseRestOfDocument(parser, current);
 }
 private void parseRestOfDocument(XmlPullParser parser,
 DefaultMutableTreeNode current) throws XmlPullParserException,
 IOException {
 int type = parser.getEventType( );
 while (type != XmlPullParser.END_DOCUMENT) {
 switch (type) {
 case XmlPullParser.START_TAG:
 DefaultMutableTreeNode element = new DefaultMutableTreeNode(
 "Element: " + parser.getName( ));
 current.add(element);
 current = element;
 // Determine namespace
 if (parser.getNamespace( ) != null) {
 String prefix = parser.getPrefix( );
 if (!"".equals(prefix)) {
 prefix = "[None]";
 }
 DefaultMutableTreeNode namespace = new DefaultMutableTreeNode(
 "Namespace: prefix = '" + prefix + "', URI = '"
 + parser.getNamespace( ) + "'");
 current.add(namespace);
 }
 if (parser.getAttributeCount( ) > 0) {
 for (int i = 0; i < parser.getAttributeCount( ); i++) {
 DefaultMutableTreeNode attrib = new DefaultMutableTreeNode(
 "Attribute (name = '"
 + parser.getAttributeName(i)
 + "', value = '"
 + parser.getAttributeValue(i) + "')");
 String attURI = parser.getAttributeNamespace(i);
 if (!"".equals(attURI)) {
 String attPrefix = parser.getAttributePrefix(i);
 if (attPrefix == null || attPrefix.equals("")) {
 attPrefix = "[None]";
 }
 DefaultMutableTreeNode an = new DefaultMutableTreeNode(
 "Namespace: prefix = '" + attPrefix
 + "', URI = '" + attURI + "'");
 attrib.add(an);
 }
 current.add(attrib);
 }
 }
 break;
 case XmlPullParser.END_TAG:
 current = (DefaultMutableTreeNode) current.getParent( );
 break;
 case XmlPullParser.TEXT:
 if (!parser.isWhitespace( )) {
 DefaultMutableTreeNode data = new DefaultMutableTreeNode(
 "Character Data: '" + parser.getText( ) + "'");
 current.add(data);
 }
 break;
 case XmlPullParser.IGNORABLE_WHITESPACE:
 // let's ignore this
 break;
 case XmlPullParser.COMMENT:
 DefaultMutableTreeNode comment = new DefaultMutableTreeNode(
 "Comment: '" + parser.getText( ) + "'");
 current.add(comment);
 break;
 default:
 System.out.println(type);
 }
 type = parser.next( );
 }
 }
}