Mega Code Archive
Load XML document to a tree with XML stream reader
<![CDATA[
import java.awt.BorderLayout;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
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.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
public class StAXStreamTreeViewer extends JFrame {
private JTree jTree;
DefaultTreeModel defaultTreeModel;
public StAXStreamTreeViewer()throws Exception {
StAXStreamTreeViewer viewer = new StAXStreamTreeViewer();
File file = new File("yourXML.xml");
DefaultMutableTreeNode base = new DefaultMutableTreeNode("XML Document: "
+ file.getAbsolutePath());
defaultTreeModel = new DefaultTreeModel(base);
jTree = new JTree(defaultTreeModel);
buildTree(defaultTreeModel, base, file);
getContentPane().add(new JScrollPane(jTree), BorderLayout.CENTER);
viewer.setVisible(true);
setSize(800, 450);
}
public static void main(String[] args)throws Exception {
new StAXStreamTreeViewer();
}
public void buildTree(DefaultTreeModel treeModel, DefaultMutableTreeNode current, File file)
throws XMLStreamException, FileNotFoundException {
FileInputStream inputStream = new FileInputStream(file);
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(inputStream);
addStartDocumentNodes(reader, current);
parseRestOfDocument(reader, current);
}
private void addStartDocumentNodes(XMLStreamReader reader, DefaultMutableTreeNode current) {
DefaultMutableTreeNode version = new DefaultMutableTreeNode(reader.getVersion());
current.add(version);
DefaultMutableTreeNode standalone = new DefaultMutableTreeNode(reader.isStandalone());
current.add(standalone);
DefaultMutableTreeNode standaloneSet = new DefaultMutableTreeNode(reader.standaloneSet());
current.add(standaloneSet);
DefaultMutableTreeNode encoding = new DefaultMutableTreeNode(reader.getEncoding());
current.add(encoding);
DefaultMutableTreeNode declaredEncoding = new DefaultMutableTreeNode(reader.getCharacterEncodingScheme());
current.add(declaredEncoding);
}
private void parseRestOfDocument(XMLStreamReader reader, DefaultMutableTreeNode current)
throws XMLStreamException {
while (reader.hasNext()) {
int type = reader.next();
switch (type) {
case XMLStreamConstants.START_ELEMENT:
DefaultMutableTreeNode element = new DefaultMutableTreeNode(reader.getLocalName());
current.add(element);
current = element;
if (reader.getNamespaceURI() != null) {
String prefix = reader.getPrefix();
if (prefix == null) {
prefix = "[None]";
}
DefaultMutableTreeNode namespace = new DefaultMutableTreeNode("prefix = '"
+ prefix + "', URI = '" + reader.getNamespaceURI() + "'");
current.add(namespace);
}
if (reader.getAttributeCount() > 0) {
for (int i = 0; i < reader.getAttributeCount(); i++) {
DefaultMutableTreeNode attribute = new DefaultMutableTreeNode("Attribute (name = '"
+ reader.getAttributeLocalName(i) + "', value = '" + reader.getAttributeValue(i)
+ "')");
String attURI = reader.getAttributeNamespace(i);
if (attURI != null) {
String attPrefix = reader.getAttributePrefix(i);
if (attPrefix == null || attPrefix.equals("")) {
attPrefix = "[None]";
}
DefaultMutableTreeNode attNamespace = new DefaultMutableTreeNode(
"prefix=" + attPrefix + ",URI=" + attURI);
attribute.add(attNamespace);
}
current.add(attribute);
}
}
break;
case XMLStreamConstants.END_ELEMENT:
current = (DefaultMutableTreeNode) current.getParent();
break;
case XMLStreamConstants.CHARACTERS:
if (!reader.isWhiteSpace()) {
DefaultMutableTreeNode data = new DefaultMutableTreeNode("CD:"
+ reader.getText());
current.add(data);
}
break;
case XMLStreamConstants.DTD:
DefaultMutableTreeNode dtd = new DefaultMutableTreeNode("DTD:" + reader.getText());
current.add(dtd);
break;
case XMLStreamConstants.SPACE:
break;
case XMLStreamConstants.COMMENT:
DefaultMutableTreeNode comment = new DefaultMutableTreeNode(reader.getText());
current.add(comment);
break;
default:
System.out.println(type);
}
}
}
}
]]>