| /* |
| * @(#)$Id$ |
| * |
| * 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 |
| * |
| */ |
| |
| import java.io.*; |
| import java.text.*; |
| import java.util.*; |
| |
| import java.rmi.RemoteException; |
| import javax.ejb.SessionBean; |
| import javax.ejb.SessionContext; |
| |
| 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.*; |
| import org.apache.xalan.xsltc.dom.*; |
| |
| public class TransformBean implements SessionBean { |
| |
| private SessionContext _context = null; |
| |
| private final static String nullErrorMsg = |
| "<h1>XSL transformation error</h1>"+ |
| "<p>'null' parameters sent to the XSL transformation bean's "+ |
| "<tt>transform(String document, String translet)</tt> method.</p>"; |
| |
| private static final String NAMESPACE_FEATURE = |
| "http://xml.org/sax/features/namespaces"; |
| |
| /** |
| * Read the input document and build the internal "DOM" tree. |
| */ |
| private DOMImpl getDOM(String url, AbstractTranslet translet) |
| throws Exception { |
| |
| // 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 |
| DOMImpl dom = new DOMImpl(); |
| reader.setContentHandler(dom.getBuilder()); |
| |
| // Create a DTD monitor and pass it to the XMLReader object |
| final DTDMonitor dtdMonitor = new DTDMonitor(); |
| dtdMonitor.handleDTD(reader); |
| translet.setDTDMonitor(dtdMonitor); |
| |
| // Parse the input document |
| reader.parse(url); |
| |
| return dom; |
| } |
| |
| /** |
| * Generates HTML from a basic error message and an exception |
| */ |
| private void errorMsg(PrintWriter out, Exception e, String msg) { |
| out.println("<h1>Error</h1>"); |
| out.println("<p>"+msg+"</p><br>"); |
| out.println(e.toString()); |
| } |
| |
| /** |
| * Main bean entry point |
| */ |
| public String transform(String document, String transletName) { |
| |
| // Initialise the output stream |
| final StringWriter sout = new StringWriter(); |
| final PrintWriter out = new PrintWriter(sout); |
| |
| try { |
| if ((document == null) || (transletName == null)) { |
| out.println(nullErrorMsg); |
| } |
| else { |
| // Instanciate a translet object (inherits AbstractTranslet) |
| Class tc = Class.forName(transletName); |
| AbstractTranslet translet = (AbstractTranslet)tc.newInstance(); |
| |
| // Read input document from the DOM cache |
| DOMImpl dom = getDOM(document, translet); |
| |
| // Initialize the (default) SAX 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) { |
| errorMsg(out, e, "Could not locate source document: "+document); |
| } |
| catch (ClassNotFoundException e) { |
| errorMsg(out, e, "Could not locate the translet class: "+ |
| transletName); |
| } |
| catch (SAXException e) { |
| errorMsg(out, e, "Error parsing document "+document); |
| } |
| catch (Exception e) { |
| errorMsg(out, e, "Impossible state reached."); |
| } |
| |
| // Now close up the sink, and return the HTML output in the |
| // StringWrite object as a string. |
| out.close(); |
| return sout.toString(); |
| } |
| |
| /** |
| * |
| */ |
| public void setSessionContext(SessionContext context) { |
| _context = context; |
| } |
| |
| // General EJB entry points |
| public void ejbCreate() { } |
| public void ejbRemove() { } |
| public void ejbActivate() { } |
| public void ejbPassivate() { } |
| public void ejbLoad() { } |
| public void ejbStore() { } |
| } |