saxDemo.rar_Eclipse_sax_xml

/* * Created on 2005-11-20 * * TODO To change the template for this generated file go to * Window - Preferences - Java - Code Style - Code Templates */ /*-- Copyright (C) 2001 Brett McLaughlin. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions, and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the disclaimer that follows these conditions in the documentation and/or other materials provided with the distribution. 3. The name "Java and XML" must not be used to endorse or promote products derived from this software without prior written permission. For written permission, please contact brett@newInstance.com. In addition, we request (but do not require) that you include in the end-user documentation provided with the redistribution and/or in the software itself an acknowledgement equivalent to the following: "This product includes software developed for the 'Java and XML' book, by Brett McLaughlin (O'Reilly & Associates)." THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ import java.io.IOException; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import org.xml.sax.Attributes; import org.xml.sax.ContentHandler; import org.xml.sax.ErrorHandler; import org.xml.sax.InputSource; import org.xml.sax.Locator; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.XMLReaderFactory; // This is an XML book - no need for explicit Swing imports import java.awt.*; import javax.swing.*; import javax.swing.tree.*; /** * @author Administrator * * TODO To change the template for this generated type comment go to * Window - Preferences - Java - Code Style - Code Templates */ public class SAXTreeValidator extends JFrame { /** Default parser to use */ private String vendorParserClass = "org.apache.xerces.parsers.SAXParser"; /** The base tree to render */ private JTree jTree; /** Tree model to use */ DefaultTreeModel defaultTreeModel; /** * <p> This initializes the needed Swing settings. </p> */ public SAXTreeValidator() { // Handle Swing setup super("SAX Tree Validator"); setSize(600, 450); } /** * <p> This will construct the tree using Swing. </p> * * @param filename <code>String</code> path to XML document. */ public void init(String xmlURI) throws IOException, SAXException { 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); } /** * <p>This handles building the Swing UI tree.</p> * * @param treeModel Swing component to build upon. * @param base tree node to build on. * @param xmlURI URI to build XML document from. * @throws <code>IOException</code> - when reading the XML URI fails. * @throws <code>SAXException</code> - when errors in parsing occur. */ public void buildTree(DefaultTreeModel treeModel, DefaultMutableTreeNode base, String xmlURI) throws IOException, SAXException { // Create instances needed for parsing XMLReader reader = XMLReaderFactory.createXMLReader(vendorParserClass); ContentHandler jTreeContentHandler = new JValidatorContentHandler(treeModel, base); ErrorHandler jTreeErrorHandler = new JValidatorErrorHandler(); // Register content handler reader.setContentHandler(jTreeContentHandler); // Register error handler reader.setErrorHandler(jTreeErrorHandler); // Turn on validation reader.setFeature("http://xml.org/sax/features/validation", true); reader.setFeature("http://apache.org/xml/features/validation/schema-full-checking", true); // Parse InputSource inputSource = new InputSource(xmlURI); reader.parse(inputSource); } /** * <p> Static entry point for running the viewer. </p> */ public static void main(String[] args) { try { if (args.length != 1) { System.out.println( "Usage: java SAXTreeViewer " + "[XML Document URI]"); System.exit(0); } SAXTreeValidator viewer = new SAXTreeValidator(); viewer.init(args[0]); viewer.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } } /** * <b><code>JValidatorContentHandler</code></b> implements the SAX * <code>ContentHandler</code> interface and defines callback * behavior for the SAX callbacks associated with an XML * document's content, bulding up JTree nodes. */ class JValidatorContentHandler implements ContentHandler { /** Hold onto the locator for location information */ private Locator locator; /** Store URI to prefix mappings */ private Map namespaceMappings; /** Tree Model to add nodes to */ private DefaultTreeModel treeModel; /** Current node to add sub-nodes to */ private DefaultMutableTreeNode current; /** * <p> Set up for working with the JTree. </p> * * @param treeModel tree to add nodes to. * @param base node to start adding sub-nodes to. */ public JValidatorContentHandler(DefaultTreeModel treeModel, DefaultMutableTreeNode base) { this.treeModel = treeModel; this.current = base; this.namespaceMappings = new HashMap(); } /** * <p> * Provide reference to <code>Locator</code> which provides * information about where in a document callbacks occur. * </p> * * @param locator <code>Locator</code> object tied to callback * process */ public void setDocumentLocator(Locator locator) { // Save this for later use this.locator = locator; } /** * <p> * This indicates the start of a Document parse-this precedes * all callbacks in all SAX Handlers with the sole exception * of <code>{@link #setDocumentLocator}</code>. * </p> * * @throws <code>SAXException</code> when things go wrong */ public void startDocument() throws SAXException { // No visual events occur here } /** * <p> * This indicates the end of a Document parse-this occ