code: /*
   * 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.PrintWriter;
  import java.io.StringWriter;
  
  import javax.xml.transform.Transformer;
  import javax.xml.transform.TransformerFactory;
  import javax.xml.transform.ErrorListener;
  import javax.xml.transform.stream.StreamResult;
  import javax.xml.transform.stream.StreamSource;
  
  import javax.ejb.SessionBean;
  import javax.ejb.SessionContext;
  
  /**
   * @author Morten Jorgensen
   */
  public class TransformBean implements SessionBean {
  
      private SessionContext m_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";
  
      /**
       * 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 {
                  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));
  
                  // Do the actual transformation
                  final long start = System.currentTimeMillis();
                  t.transform(new StreamSource(document),
                              new StreamResult(out));
                  final long done = System.currentTimeMillis() - start;
                  out.println("<!-- transformed by XSLTC in "+done+"msecs -->");
  	    }
  	}
  
  	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) {
  	m_context = context;
      }
  
      // General EJB entry points
      public void ejbCreate() { }
      public void ejbRemove() { }
      public void ejbActivate() { }
      public void ejbPassivate() { }
      public void ejbLoad() { }
      public void ejbStore() { }
  }
  