001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *   http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package org.apache.myfaces.tobago.servlet;
021    
022    import org.apache.commons.logging.Log;
023    import org.apache.commons.logging.LogFactory;
024    import org.apache.myfaces.tobago.config.Attribute;
025    import org.apache.myfaces.tobago.config.MappingRule;
026    import org.apache.myfaces.tobago.config.TobagoConfig;
027    
028    import javax.faces.context.FacesContext;
029    import javax.servlet.RequestDispatcher;
030    import javax.servlet.ServletException;
031    import javax.servlet.ServletRequest;
032    import javax.servlet.http.HttpServlet;
033    import javax.servlet.http.HttpServletRequest;
034    import javax.servlet.http.HttpServletResponse;
035    import java.io.IOException;
036    import java.util.Iterator;
037    
038    /**
039     * @deprecated Please use JSP 2.0 tag-files or an other template mechanism.
040     */
041    @Deprecated
042    public class TemplateServlet extends HttpServlet {
043    
044      private static final long serialVersionUID = -646440036923109210L;
045    
046      private static final Log LOG = LogFactory.getLog(TemplateServlet.class);
047    
048      public void service(
049          HttpServletRequest request, HttpServletResponse response)
050          throws ServletException, IOException {
051    
052        String viewId = request.getRequestURI().substring(
053            request.getContextPath().length());
054    
055        if (LOG.isDebugEnabled()) {
056          LOG.debug("viewId = '" + viewId + "'");
057        }
058        String requestUri = remap(request, viewId);
059        if (LOG.isDebugEnabled()) {
060          LOG.debug("requestUri = '" + requestUri + "'");
061        }
062    
063        if (requestUri.endsWith(".view")) { // TODO: make .view configurable
064          String error = "cannot find URI in config file: '" + requestUri + "'";
065          LOG.error(error);
066          throw new ServletException(error);
067        }
068    
069        if (LOG.isDebugEnabled()) {
070          LOG.debug("requestUri = '" + requestUri + "'");
071        }
072    
073        try {
074          RequestDispatcher dispatcher = request.getRequestDispatcher(requestUri);
075          dispatcher.forward(request, response);
076        } catch (IOException e) {
077          LOG.error("requestUri '" + requestUri + "' "
078              + "viewId '" + viewId + "' ", e);
079          throw e;
080        } catch (ServletException e) {
081          LOG.error("requestUri '" + requestUri + "' "
082              + "viewId '" + viewId + "' ", e);
083          throw e;
084        }
085      }
086    
087      private String remap(ServletRequest request, String requestURI) {
088        FacesContext facesContext = FacesContext.getCurrentInstance();
089        TobagoConfig config = TobagoConfig.getInstance(facesContext);
090        MappingRule mappingRule = config.getMappingRule(requestURI);
091        if (mappingRule == null) {
092          return requestURI;
093        }
094        for (Iterator i = mappingRule.getAttributes().iterator(); i.hasNext();) {
095          Attribute attribute = (Attribute) i.next();
096          request.setAttribute(attribute.getKey(), attribute.getValue());
097        }
098        return mappingRule.getForwardUri();
099      }
100    
101    }