/*
    * $Id$
    *
    * 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.
   */
  package org.apache.struts.chain.commands.servlet;
  
  import org.apache.struts.chain.Constants;
  import org.apache.struts.chain.commands.AbstractSelectAction;
  import org.apache.struts.chain.contexts.ActionContext;
  import org.apache.struts.chain.contexts.ServletActionContext;
  import org.apache.struts.config.ModuleConfig;
  
  import jakarta.servlet.http.HttpServletRequest;
  
  /**
   * <p>Cache the <code>ActionConfig</code> instance for the action to be used
   * for processing this request.</p>
   *
   * @version $Rev$ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
   *          $
   */
  public class SelectAction extends AbstractSelectAction {
      // ------------------------------------------------------- Protected Methods
      protected String getPath(ActionContext context) {
          ServletActionContext saContext = (ServletActionContext) context;
          HttpServletRequest request = saContext.getRequest();
          String path = null;
          boolean extension = false;
  
          // For prefix matching, match on the path info
          path = (String) request.getAttribute(Constants.INCLUDE_PATH_INFO);
  
          if ((path == null) || (path.length() == 0)) {
              path = request.getPathInfo();
          }
  
          // For extension matching, match on the servlet path
          if ((path == null) || (path.length() == 0)) {
              path =
                  (String) request.getAttribute(Constants.INCLUDE_SERVLET_PATH);
  
              if ((path == null) || (path.length() == 0)) {
                  path = request.getServletPath();
              }
  
              if ((path == null) || (path.length() == 0)) {
                  throw new IllegalArgumentException(
                      "No path information in request");
              }
  
              extension = true;
          }
  
          // Strip the module prefix and extension (if any)
          ModuleConfig moduleConfig = saContext.getModuleConfig();
          String prefix = moduleConfig.getPrefix();
  
          if (!path.startsWith(prefix)) {
              throw new IllegalArgumentException("Path does not start with '"
                  + prefix + "'");
          }
  
          path = path.substring(prefix.length());
  
          if (extension) {
              int slash = path.lastIndexOf("/");
              int period = path.lastIndexOf(".");
  
              if ((period >= 0) && (period > slash)) {
                  path = path.substring(0, period);
              }
          }
  
          return (path);
      }
  }