1   /*
    2    * Copyright 2003,2004 The Apache Software Foundation.
    3    * 
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    * 
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    * 
   10    * Unless required by applicable law or agreed to in writing, software
   11    * distributed under the License is distributed on an "AS IS" BASIS,
   12    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   13    * See the License for the specific language governing permissions and
   14    * limitations under the License.
   15    */
   16   
   17   package org.apache.struts.chain.servlet;
   18   
   19   
   20   import javax.servlet.http.HttpServletRequest;
   21   import org.apache.commons.chain.Context;
   22   import org.apache.commons.chain.web.servlet.ServletWebContext;
   23   import org.apache.struts.chain.AbstractSelectAction;
   24   import org.apache.struts.chain.Constants;
   25   import org.apache.struts.config.ModuleConfig;
   26   
   27   
   28   /**
   29    * <p>Cache the <code>ActionConfig</code> instance for the
   30    * action to be used for processing this request.</p>
   31    *
   32    * @version $Rev: 54933 $ $Date: 2004-10-16 18:04:52 +0100 (Sat, 16 Oct 2004) $
   33    */
   34   
   35   public class SelectAction extends AbstractSelectAction {
   36   
   37   
   38       // ------------------------------------------------------- Protected Methods
   39   
   40   
   41       protected String getPath(Context context) {
   42   
   43           ServletWebContext swcontext = (ServletWebContext) context;
   44           HttpServletRequest request = swcontext.getRequest();
   45           String path = null;
   46           boolean extension = false;
   47   
   48           // For prefix matching, match on the path info
   49           path = (String) request.getAttribute(Constants.INCLUDE_PATH_INFO);
   50           if (path == null) {
   51               path = request.getPathInfo();
   52           }
   53   
   54           // For extension matching, match on the servlet path
   55           if (path == null) {
   56               path =
   57                   (String) request.getAttribute(Constants.INCLUDE_SERVLET_PATH);
   58               if (path == null) {
   59                   path = request.getServletPath();
   60               }
   61               if (path == null) {
   62                   throw new IllegalArgumentException
   63                       ("No path information in request");
   64               }
   65               extension = true;
   66           }
   67   
   68           // Strip the module prefix and extension (if any)
   69           ModuleConfig moduleConfig = (ModuleConfig)
   70               swcontext.get(getModuleConfigKey());
   71           String prefix = moduleConfig.getPrefix();
   72           if (!path.startsWith(prefix)) {
   73               throw new IllegalArgumentException("Path does not start with '" +
   74                                                  prefix + "'");
   75           }
   76           path = path.substring(prefix.length());
   77           if (extension) {
   78               int slash = path.lastIndexOf("/");
   79               int period = path.lastIndexOf(".");
   80               if ((period >= 0) && (period > slash)) {
   81                   path = path.substring(0, period);
   82               }
   83           }
   84           return (path);
   85   
   86       }
   87   
   88   
   89   }