samples/CompiledApplet/TransformApplet.java - xalan-j - Git at Google

 /*
  * @(#)$Id$
  *
  * The Apache Software License, Version 1.1
  *
  * Copyright (c) 2001-2003 The Apache Software Foundation.  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 following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * 3. The end-user documentation included with the redistribution,
  *    if any, must include the following acknowledgment:
  *       "This product includes software developed by the
  *        Apache Software Foundation (http://www.apache.org/)."
  *    Alternately, this acknowledgment may appear in the software itself,
  *    if and wherever such third-party acknowledgments normally appear.
  *
  * 4. The names "Xalan" and "Apache Software Foundation" must
  *    not be used to endorse or promote products derived from this
  *    software without prior written permission. For written
  *    permission, please contact apache@apache.org.
  *
  * 5. Products derived from this software may not be called "Apache",
  *    nor may "Apache" appear in their name, without prior written
  *    permission of the Apache Software Foundation.
  *
  * 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 APACHE SOFTWARE FOUNDATION OR
  * ITS 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.
  * ====================================================================
  *
  * This software consists of voluntary contributions made by many
  * individuals on behalf of the Apache Software Foundation and was
  * originally based on software copyright (c) 2001, Sun
  * Microsystems., http://www.sun.com.  For more
  * information on the Apache Software Foundation, please see
  * <http://www.apache.org/>.
  *
  * @author Morten Jorgensen
  * @author Jacek Ambroziak
  *
  */

 import java.io.*;
 import java.applet.*;
 import java.awt.*;
 import java.awt.event.*;

 import javax.xml.parsers.SAXParser;
 import javax.xml.parsers.SAXParserFactory;
 import javax.xml.parsers.ParserConfigurationException;

 import org.xml.sax.XMLReader;
 import org.xml.sax.SAXException;

 import org.apache.xalan.xsltc.*;
 import org.apache.xalan.xsltc.runtime.AbstractTranslet;
 import org.apache.xalan.xsltc.runtime.MessageHandler;
 import org.apache.xalan.xsltc.runtime.output.*;
 import org.apache.xalan.xsltc.dom.*;

 /**
  * This applet demonstrates how XSL transformations can be made run in
  * browsers without native XSLT support.
  *
  * Note that the XSLTC transformation engine is invoked through its native
  * interface and not the javax.xml.transform (JAXP) interface. This because
  * XSLTC still does not offer precompiled transformations through JAXP.
  */
 public final class TransformApplet extends Applet {

     // Single document cache
     private String _documentUrl = "";
     private DOMImpl _dom = null;
     private DTDMonitor _dtdMonitor = null;

     private static final String NAMESPACE_FEATURE =
 	"http://xml.org/sax/features/namespaces";

     /**
      * This class implements a dialog box used for XSL messages/comments
      */
     public class MessageFrame extends Frame {

 	public Frame frame;

         public class ButtonHandler implements ActionListener {
 	    public void actionPerformed(ActionEvent e) {
 	        frame.setVisible(false);
 	    }
 	}

 	/**
 	 * This method handles xml:message and xsl:comment by displaying
 	 * the message/comment in a dialog box.
 	 */
 	public MessageFrame(String title, String message) {
 	    super(title);
 	    frame = this; // Make visible to ButtonHandler
 	    setSize(320,200);

 	    // Create a panel for the message itself
 	    Panel center = new Panel();
 	    center.add(new Label(message));

 	    // Create a panel for the 'OK' button
 	    Panel bottom = new Panel();
 	    Button okButton = new Button("   OK   ");
 	    okButton.addActionListener(new ButtonHandler());
 	    bottom.add(okButton);

 	    // Add the two panels to the window/frame
 	    add(center, BorderLayout.CENTER);
 	    add(bottom,BorderLayout.SOUTH);

 	    // Show the fecking thing
 	    setVisible(true);
 	}

     }

     /**
      * The appled uses this method to display messages and comments
      * generated by xsl:message and xsl:comment elements.
      */
     public class AppletMessageHandler extends MessageHandler {
 	public void displayMessage(String msg) {
 	    MessageFrame z = new MessageFrame("XSL transformation alert",msg);
 	}
     }

     /**
      * Reads the input document from the supplied URL and builds the
      * internal "DOM" tree.
      */
     private DOM getDOM(String url) throws Exception {
 	// Check if the document is already in the 1-document cache
 	if (url.equals(_documentUrl) == false) {

 	    // Create a SAX parser and get the XMLReader object it uses
 	    final SAXParserFactory factory = SAXParserFactory.newInstance();
 	    try {
 		factory.setFeature(NAMESPACE_FEATURE,true);
 	    }
 	    catch (Exception e) {
 		factory.setNamespaceAware(true);
 	    }
 	    final SAXParser parser = factory.newSAXParser();
 	    final XMLReader reader = parser.getXMLReader();

 	    // Set the DOM's builder as the XMLReader's SAX2 content handler
 	    _dom = new DOMImpl();
 	    reader.setContentHandler(_dom.getBuilder());

 	    // Create a DTD monitor and pass it to the XMLReader object
 	    _dtdMonitor = new DTDMonitor();
 	    _dtdMonitor.handleDTD(reader);

 	    // Parse the input document
 	    reader.parse(url);

 	    // Update the 1-document cahce with this DOM
 	    _documentUrl = url;
 	}
 	return _dom;
     }

     /**
      * This method is the main body of the applet. The method is called
      * by some JavaScript code in an HTML document.
      */
     public String transform(Object arg1, Object arg2) {

 	// Convert the two arguments to strings.
 	final String transletName = (String)arg1;
 	final String documentUrl = (String)arg2;

 	// Initialise the output stream
 	final StringWriter sout = new StringWriter();
 	final PrintWriter out = new PrintWriter(sout);

 	try {
 	    // Check that the parameters are valid
 	    if (transletName == null || documentUrl == null) {
 		out.println("<h1>Transformation error</h1>");
 		out.println("The parameters <b><tt>class</tt></b> "+
 			    "and <b><tt>source</tt></b> must be specified");
 	    }
 	    else {
 		// Instanciate a message handler for xsl:message/xsl:comment
 		AppletMessageHandler msgHandler = new AppletMessageHandler();

 		// Get a refenrence to the translet class
 		final Class tc = Class.forName(transletName);

 		// Instanciate and initialise the tranlet object
 		AbstractTranslet translet = (AbstractTranslet)tc.newInstance();
 		((AbstractTranslet)translet).setMessageHandler(msgHandler);

 		// Create output handler
 		TransletOutputHandlerFactory tohFactory =
 		    TransletOutputHandlerFactory.newInstance();
 		tohFactory.setOutputType(TransletOutputHandlerFactory.STREAM);
 		tohFactory.setEncoding(translet._encoding);
 		tohFactory.setOutputMethod(translet._method);
 		tohFactory.setWriter(out);

 		getDOM(documentUrl);

 		final long start = System.currentTimeMillis();

 		// Set size of key/id indices
 		translet.setIndexSize(_dom.getSize());
 		// If there are any elements with ID attributes, build an index

 		_dtdMonitor.buildIdIndex(_dom, 0, translet);
 		// Pass unparsed entities to translet
 		translet.setUnparsedEntityURIs(_dtdMonitor.
 					       getUnparsedEntityURIs());
 		// Do the actual transformation
 		translet.transform(_dom, tohFactory.getTransletOutputHandler());

 		final long done = System.currentTimeMillis() - start;
 		out.println("<!-- transformed by XSLTC in "+done+"msecs -->");
 	    }
 	    // Now close up the sink, and return the HTML output in the
 	    // StringWrite object as a string.
 	    out.close();
 	    System.err.println("Transformation complete!");
 	    System.err.println(sout.toString());
 	    return sout.toString();
 	}
 	catch (RuntimeException e) {
 	    out.close();
 	    return sout.toString();
 	}
 	catch (Exception e) {
 	    out.println("<h1>exception</h1>");
 	    out.println(e.toString());
 	    out.close();
 	    return sout.toString();
 	}
     }
 }
	/*
	* @(#)$Id$
	*
	* The Apache Software License, Version 1.1
	*
	* Copyright (c) 2001-2003 The Apache Software Foundation. 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 following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* 3. The end-user documentation included with the redistribution,
	* if any, must include the following acknowledgment:
	* "This product includes software developed by the
	* Apache Software Foundation (http://www.apache.org/)."
	* Alternately, this acknowledgment may appear in the software itself,
	* if and wherever such third-party acknowledgments normally appear.
	*
	* 4. The names "Xalan" and "Apache Software Foundation" must
	* not be used to endorse or promote products derived from this
	* software without prior written permission. For written
	* permission, please contact apache@apache.org.
	*
	* 5. Products derived from this software may not be called "Apache",
	* nor may "Apache" appear in their name, without prior written
	* permission of the Apache Software Foundation.
	*
	* 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 APACHE SOFTWARE FOUNDATION OR
	* ITS 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.
	* ====================================================================
	*
	* This software consists of voluntary contributions made by many
	* individuals on behalf of the Apache Software Foundation and was
	* originally based on software copyright (c) 2001, Sun
	* Microsystems., http://www.sun.com. For more
	* information on the Apache Software Foundation, please see
	* <http://www.apache.org/>.
	*
	* @author Morten Jorgensen
	* @author Jacek Ambroziak
	*
	*/

	import java.io.*;
	import java.applet.*;
	import java.awt.*;
	import java.awt.event.*;

	import javax.xml.parsers.SAXParser;
	import javax.xml.parsers.SAXParserFactory;
	import javax.xml.parsers.ParserConfigurationException;

	import org.xml.sax.XMLReader;
	import org.xml.sax.SAXException;

	import org.apache.xalan.xsltc.*;
	import org.apache.xalan.xsltc.runtime.AbstractTranslet;
	import org.apache.xalan.xsltc.runtime.MessageHandler;
	import org.apache.xalan.xsltc.runtime.output.*;
	import org.apache.xalan.xsltc.dom.*;

	/**
	* This applet demonstrates how XSL transformations can be made run in
	* browsers without native XSLT support.
	*
	* Note that the XSLTC transformation engine is invoked through its native
	* interface and not the javax.xml.transform (JAXP) interface. This because
	* XSLTC still does not offer precompiled transformations through JAXP.
	*/
	public final class TransformApplet extends Applet {

	// Single document cache
	private String _documentUrl = "";
	private DOMImpl _dom = null;
	private DTDMonitor _dtdMonitor = null;

	private static final String NAMESPACE_FEATURE =
	"http://xml.org/sax/features/namespaces";

	/**
	* This class implements a dialog box used for XSL messages/comments
	*/
	public class MessageFrame extends Frame {

	public Frame frame;

	public class ButtonHandler implements ActionListener {
	public void actionPerformed(ActionEvent e) {
	frame.setVisible(false);
	}
	}

	/**
	* This method handles xml:message and xsl:comment by displaying
	* the message/comment in a dialog box.
	*/
	public MessageFrame(String title, String message) {
	super(title);
	frame = this; // Make visible to ButtonHandler
	setSize(320,200);

	// Create a panel for the message itself
	Panel center = new Panel();
	center.add(new Label(message));

	// Create a panel for the 'OK' button
	Panel bottom = new Panel();
	Button okButton = new Button(" OK ");
	okButton.addActionListener(new ButtonHandler());
	bottom.add(okButton);

	// Add the two panels to the window/frame
	add(center, BorderLayout.CENTER);
	add(bottom,BorderLayout.SOUTH);

	// Show the fecking thing
	setVisible(true);
	}

	}

	/**
	* The appled uses this method to display messages and comments
	* generated by xsl:message and xsl:comment elements.
	*/
	public class AppletMessageHandler extends MessageHandler {
	public void displayMessage(String msg) {
	MessageFrame z = new MessageFrame("XSL transformation alert",msg);
	}
	}

	/**
	* Reads the input document from the supplied URL and builds the
	* internal "DOM" tree.
	*/
	private DOM getDOM(String url) throws Exception {
	// Check if the document is already in the 1-document cache
	if (url.equals(_documentUrl) == false) {

	// Create a SAX parser and get the XMLReader object it uses
	final SAXParserFactory factory = SAXParserFactory.newInstance();
	try {
	factory.setFeature(NAMESPACE_FEATURE,true);
	}
	catch (Exception e) {
	factory.setNamespaceAware(true);
	}
	final SAXParser parser = factory.newSAXParser();
	final XMLReader reader = parser.getXMLReader();

	// Set the DOM's builder as the XMLReader's SAX2 content handler
	_dom = new DOMImpl();
	reader.setContentHandler(_dom.getBuilder());

	// Create a DTD monitor and pass it to the XMLReader object
	_dtdMonitor = new DTDMonitor();
	_dtdMonitor.handleDTD(reader);

	// Parse the input document
	reader.parse(url);

	// Update the 1-document cahce with this DOM
	_documentUrl = url;
	}
	return _dom;
	}

	/**
	* This method is the main body of the applet. The method is called
	* by some JavaScript code in an HTML document.
	*/
	public String transform(Object arg1, Object arg2) {

	// Convert the two arguments to strings.
	final String transletName = (String)arg1;
	final String documentUrl = (String)arg2;

	// Initialise the output stream
	final StringWriter sout = new StringWriter();
	final PrintWriter out = new PrintWriter(sout);

	try {
	// Check that the parameters are valid
	if (transletName == null \|\| documentUrl == null) {
	out.println("<h1>Transformation error</h1>");
	out.println("The parameters <b><tt>class</tt></b> "+
	"and <b><tt>source</tt></b> must be specified");
	}
	else {
	// Instanciate a message handler for xsl:message/xsl:comment
	AppletMessageHandler msgHandler = new AppletMessageHandler();

	// Get a refenrence to the translet class
	final Class tc = Class.forName(transletName);

	// Instanciate and initialise the tranlet object
	AbstractTranslet translet = (AbstractTranslet)tc.newInstance();
	((AbstractTranslet)translet).setMessageHandler(msgHandler);

	// Create output handler
	TransletOutputHandlerFactory tohFactory =
	TransletOutputHandlerFactory.newInstance();
	tohFactory.setOutputType(TransletOutputHandlerFactory.STREAM);
	tohFactory.setEncoding(translet._encoding);
	tohFactory.setOutputMethod(translet._method);
	tohFactory.setWriter(out);

	getDOM(documentUrl);

	final long start = System.currentTimeMillis();

	// Set size of key/id indices
	translet.setIndexSize(_dom.getSize());
	// If there are any elements with ID attributes, build an index

	_dtdMonitor.buildIdIndex(_dom, 0, translet);
	// Pass unparsed entities to translet
	translet.setUnparsedEntityURIs(_dtdMonitor.
	getUnparsedEntityURIs());
	// Do the actual transformation
	translet.transform(_dom, tohFactory.getTransletOutputHandler());

	final long done = System.currentTimeMillis() - start;
	out.println("<!-- transformed by XSLTC in "+done+"msecs -->");
	}
	// Now close up the sink, and return the HTML output in the
	// StringWrite object as a string.
	out.close();
	System.err.println("Transformation complete!");
	System.err.println(sout.toString());
	return sout.toString();
	}
	catch (RuntimeException e) {
	out.close();
	return sout.toString();
	}
	catch (Exception e) {
	out.println("<h1>exception</h1>");
	out.println(e.toString());
	out.close();
	return sout.toString();
	}
	}
	}