Mega Code Archive
Create a StAX Event Tree Viewer
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import java.awt.BorderLayout;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.DTD;
import javax.xml.stream.events.StartDocument;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
public class StAXEventTreeViewer extends JFrame {
DefaultMutableTreeNode base = new DefaultMutableTreeNode("XML File");
DefaultTreeModel defaultTreeModel= new DefaultTreeModel(base);
private JTree jTree= new JTree(defaultTreeModel);
public StAXEventTreeViewer()throws XMLStreamException, FileNotFoundException {
setSize(800, 650);
buildTree(defaultTreeModel, base, new File("yourXML.xml"));
getContentPane().add(new JScrollPane(jTree), BorderLayout.CENTER);
setVisible(true);
}
public static void main(String[] args) throws Exception {
new StAXEventTreeViewer();
}
public void buildTree(DefaultTreeModel treeModel, DefaultMutableTreeNode current, File file)
throws XMLStreamException, FileNotFoundException {
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLEventReader reader = inputFactory.createXMLEventReader(new FileInputStream(file));
while (reader.hasNext()) {
XMLEvent event = reader.nextEvent();
switch (event.getEventType()) {
case XMLStreamConstants.START_DOCUMENT:
StartDocument startDocument = (StartDocument) event;
DefaultMutableTreeNode version = new DefaultMutableTreeNode(startDocument.getVersion());
current.add(version);
current.add(new DefaultMutableTreeNode(startDocument.isStandalone()));
current.add(new DefaultMutableTreeNode(startDocument.standaloneSet()));
current.add(new DefaultMutableTreeNode(startDocument.encodingSet()));
current.add(new DefaultMutableTreeNode(startDocument.getCharacterEncodingScheme()));
break;
case XMLStreamConstants.START_ELEMENT:
StartElement startElement = (StartElement) event;
QName elementName = startElement.getName();
DefaultMutableTreeNode element = new DefaultMutableTreeNode(elementName.getLocalPart());
current.add(element);
current = element;
if (!elementName.getNamespaceURI().equals("")) {
String prefix = elementName.getPrefix();
if (prefix.equals("")) {
prefix = "[None]";
}
DefaultMutableTreeNode namespace = new DefaultMutableTreeNode("prefix="
+ prefix + ",URI=" + elementName.getNamespaceURI());
current.add(namespace);
}
for (Iterator it = startElement.getAttributes(); it.hasNext();) {
Attribute attr = (Attribute) it.next();
DefaultMutableTreeNode attribute = new DefaultMutableTreeNode("Attribute (name="
+ attr.getName().getLocalPart() + ",value=" + attr.getValue() + "')");
String attURI = attr.getName().getNamespaceURI();
if (!attURI.equals("")) {
String attPrefix = attr.getName().getPrefix();
if (attPrefix.equals("")) {
attPrefix = "[None]";
}
attribute.add(new DefaultMutableTreeNode("prefix = " + attPrefix + ", URI = " + attURI));
}
current.add(attribute);
}
break;
case XMLStreamConstants.END_ELEMENT:
current = (DefaultMutableTreeNode) current.getParent();
break;
case XMLStreamConstants.CHARACTERS:
Characters characters = (Characters) event;
if (!characters.isIgnorableWhiteSpace() && !characters.isWhiteSpace()) {
String data = characters.getData();
if (data.length() != 0) {
current.add(new DefaultMutableTreeNode(characters.getData()));
}
}
break;
case XMLStreamConstants.DTD:
DTD dtde = (DTD) event;
current.add(new DefaultMutableTreeNode(dtde.getDocumentTypeDeclaration()));
default:
System.out.println(event.getClass().getName());
}
}
}
}
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