| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id$ |
| */ |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.stream.StreamResult; |
| import javax.xml.transform.stream.StreamSource; |
| |
| import org.xml.sax.SAXException; |
| |
| /** |
| * 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 the JAXP |
| * interface, using the XSLTC "use-classpath" attribute. The |
| * "use-classpath" attribute specifies to the XSLTC TransformerFactory |
| * that a precompiled version of the stylesheet (translet) may be available, |
| * and that that should be used in preference to recompiling the stylesheet. |
| * @author Morten Jorgensen |
| * @author Jacek Ambroziak |
| */ |
| public final class TransformServlet extends HttpServlet { |
| |
| /** |
| * 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 transletName = request.getParameter("class"); |
| String documentURI = request.getParameter("source"); |
| |
| try { |
| if ((transletName == 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 { |
| TransformerFactory tf = TransformerFactory.newInstance(); |
| try { |
| tf.setAttribute("use-classpath", Boolean.TRUE); |
| } catch (IllegalArgumentException iae) { |
| System.err.println( |
| "Could not set XSLTC-specific TransformerFactory " |
| + "attributes. Transformation failed."); |
| } |
| Transformer t = |
| tf.newTransformer(new StreamSource(transletName)); |
| |
| // Start the transformation |
| final long start = System.currentTimeMillis(); |
| t.transform(new StreamSource(documentURI), |
| new StreamResult(out)); |
| final long done = System.currentTimeMillis() - start; |
| out.println("<!-- transformed by XSLTC in "+done+"msecs -->"); |
| } |
| } |
| catch (Exception e) { |
| out.println("<h1>Error</h1>"); |
| out.println(e.toString()); |
| } |
| } |
| } |