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From un...@apache.org
Subject cvs commit: cocoon-2.1/src/blocks/jsp/java/org/apache/cocoon/generation JSPGenerator.java JspGenerator.java
Date Fri, 16 Jan 2004 13:50:37 GMT
unico       2004/01/16 05:50:37

  Added:       src/blocks/jsp/java/org/apache/cocoon/generation
                        JSPGenerator.java
  Removed:     src/blocks/jsp/java/org/apache/cocoon/generation
                        JspGenerator.java
  Log:
  rename JspGenerator to JSPGenerator; documentation improvements
  
  Revision  Changes    Path
  1.1                  cocoon-2.1/src/blocks/jsp/java/org/apache/cocoon/generation/JSPGenerator.java
  
  Index: JSPGenerator.java
  ===================================================================
  /*
  
   ============================================================================
                     The Apache Software License, Version 1.1
   ============================================================================
  
   Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
  
   Redistribution and use in source and binary forms, with or without modifica-
   tion, 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 "Apache Cocoon" 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 (INCLU-
   DING, 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 created by
   Stefano Mazzocchi  <stefano@apache.org>. For more  information on the Apache
   Software Foundation, please see <http://www.apache.org/>.
  
  */
  package org.apache.cocoon.generation;
  
  import org.apache.cocoon.ProcessingException;
  import org.apache.cocoon.components.jsp.JSPEngine;
  import org.apache.cocoon.environment.ObjectModelHelper;
  import org.apache.cocoon.environment.http.HttpEnvironment;
  import org.apache.excalibur.xml.sax.SAXParser;
  import org.xml.sax.InputSource;
  import org.xml.sax.SAXException;
  
  import javax.servlet.ServletContext;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  
  /**
   * Allows Servlets and JSPs to be used as a generator.
   *
   * @author <a href="mailto:dims@yahoo.com">Davanum Srinivas</a>
   * @version CVS $Id: JSPGenerator.java,v 1.1 2004/01/16 13:50:37 unico Exp $
   */
  public class JSPGenerator extends ServiceableGenerator {
  
      /**
       * Generate XML data from JSPEngine output.
       */
      public void generate() throws ProcessingException {
  
          final HttpServletResponse servletResponse =
              (HttpServletResponse) this.objectModel.get(HttpEnvironment.HTTP_RESPONSE_OBJECT);
          final HttpServletRequest servletRequest =
              (HttpServletRequest) this.objectModel.get(HttpEnvironment.HTTP_REQUEST_OBJECT);
          final ServletContext servletContext =
              (ServletContext) this.objectModel.get(HttpEnvironment.HTTP_SERVLET_CONTEXT);
  
          // ensure that we are running in a servlet environment
          if (servletResponse == null || servletRequest == null || servletContext == null)
{
              throw new ProcessingException("JSPReader can only be used from within a Servlet
environment.");
          }
  
          JSPEngine engine = null;
          SAXParser parser = null;
          try {
              // TODO (KP): Should we exclude not supported protocols, say 'context'?
              String url = super.source;
              // absolute path is processed as is
              if (!url.startsWith("/")) {
                  // get current request path
                  String servletPath = servletRequest.getServletPath();
                  // remove sitemap URI part
                  String sitemapURI = ObjectModelHelper.getRequest(objectModel).getSitemapURI();
                  if (sitemapURI != null) {
                      servletPath = servletPath.substring(0, servletPath.indexOf(sitemapURI));
                  } else {
                      // for example when using cocoon:/ pseudo protocol
                      servletPath = servletPath.substring(0, servletPath.lastIndexOf("/")
+ 1);
                  }
                  url = servletPath + url;
              }
  
              engine = (JSPEngine) super.manager.lookup(JSPEngine.ROLE);
  
              if (getLogger().isDebugEnabled()) {
                  getLogger().debug("JSPGenerator executing:" + url);
              }
  
              byte[] bytes = engine.executeJSP(url, servletRequest, servletResponse, servletContext);
  
              InputSource input = new InputSource(new ByteArrayInputStream(bytes));
              // utf-8 is default encoding; specified explicitely here as a reminder.
              input.setEncoding("utf-8");
  
              // pipe the results into the parser
              parser = (SAXParser) super.manager.lookup(SAXParser.ROLE);
              parser.parse(input, super.xmlConsumer);
          } catch (ServletException e) {
              throw new ProcessingException("ServletException while executing JSPEngine",
e.getRootCause());
          } catch (SAXException e) {
              // FIXME: e.getException can be null
              throw new ProcessingException("SAXException while parsing JSPEngine output",
e.getException());
          } catch (IOException e) {
              throw new ProcessingException("IOException JSPGenerator.generate()", e);
          } catch (ProcessingException e) {
              throw e;
          } catch (Exception e) {
              throw new ProcessingException("Exception JSPGenerator.generate()", e);
          } finally {
              super.manager.release(parser);
              super.manager.release(engine);
          }
      }
  }
  
  
  

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