| /* |
| * @(#)$Id$ |
| * |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2001 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.text.*; |
| import java.util.*; |
| |
| import javax.servlet.*; |
| import javax.servlet.http.*; |
| |
| import org.xml.sax.*; |
| |
| import org.apache.xalan.xsltc.*; |
| import org.apache.xalan.xsltc.runtime.*; |
| import org.apache.xalan.xsltc.dom.*; |
| |
| /** |
| * This servlet demonstrates how XSL transformations can be made available as |
| * a web service. See the CompileServlet for an example on how stylesheets |
| * can be pre-compiled before this servlet is invoked. |
| * |
| * 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 TransformServlet extends HttpServlet { |
| |
| /* |
| * This is a document cache with 32 document slots. This servlet returns |
| * cache statistics if the 'stats' parameter is passed with the HTTP |
| * request in doGet(). |
| */ |
| private static DocumentCache cache = null; |
| |
| /** |
| * Main servlet entry point |
| */ |
| public void doGet(HttpServletRequest request, |
| HttpServletResponse response) |
| throws IOException, ServletException { |
| |
| // Initialise the output writer |
| response.setContentType("text/html"); |
| PrintWriter out = response.getWriter(); |
| |
| // Get the two paramters "class" and "source". |
| String className = request.getParameter("class"); |
| String documentURI = request.getParameter("source"); |
| |
| try { |
| // Initialize document cache with 32 DOM slots |
| if (cache == null) cache = new DocumentCache(32); |
| |
| if (request.getParameter("stats") != null) { |
| cache.getStatistics(out); |
| } |
| else if ((className == null) || (documentURI == null)) { |
| out.println("<h1>XSL transformation error</h1>"); |
| out.println("The parameters <b><tt>class</tt></b> and " + |
| "<b><tt>source</tt></b> must be specified"); |
| } |
| else { |
| // Get a reference to the translet class (not object yet) |
| Class tc = Class.forName(className); |
| // Instanciate a translet object (inherits AbstractTranslet) |
| AbstractTranslet translet = (AbstractTranslet)tc.newInstance(); |
| |
| // Set the document cache for the translet. This is needed in |
| // case the translet uses the document() function. |
| translet.setDOMCache(cache); |
| |
| // Read input document from the DOM cache |
| DOMImpl dom = cache.retrieveDocument(documentURI, 0, translet); |
| |
| // Initialize the output handler |
| DefaultSAXOutputHandler saxHandler = |
| new DefaultSAXOutputHandler(out); |
| |
| // Start the transformation |
| final long start = System.currentTimeMillis(); |
| translet.transform(dom, new TextOutput(saxHandler)); |
| final long done = System.currentTimeMillis() - start; |
| out.println("<!-- transformed by XSLTC in "+done+"msecs -->"); |
| } |
| } |
| catch (IOException e) { |
| out.println("<h1>Error</h1>"); |
| out.println("Could not locate source document: " + documentURI); |
| out.println(e.toString()); |
| } |
| catch (ClassNotFoundException e) { |
| out.println("<h1>Error</h1>"); |
| out.println("Could not locate the translet class: " + className); |
| out.println(e.toString()); |
| } |
| catch (SAXException e) { |
| out.println("<h1>Error</h1>"); |
| out.println("Error parsing document " + documentURI); |
| } |
| catch (Exception e) { |
| out.println("<h1>Error</h1>"); |
| out.println(e.toString()); |
| } |
| } |
| } |