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1   //========================================================================
2   //Copyright 2006 Mort Bay Consulting Pty. Ltd.
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   //http://www.apache.org/licenses/LICENSE-2.0
8   //Unless required by applicable law or agreed to in writing, software
9   //distributed under the License is distributed on an "AS IS" BASIS,
10  //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11  //See the License for the specific language governing permissions and
12  //limitations under the License.
13  //========================================================================
14  
15  package org.mortbay.jetty.handler;
16  
17  import java.io.IOException;
18  
19  import javax.servlet.ServletException;
20  import javax.servlet.http.HttpServletRequest;
21  import javax.servlet.http.HttpServletResponse;
22  
23  import org.mortbay.jetty.Handler;
24  import org.mortbay.jetty.HttpConnection;
25  import org.mortbay.jetty.Request;
26  
27  /* ------------------------------------------------------------ */
28  /** HandlerList.
29   * This extension of {@link org.mortbay.jetty.handler.HandlerCollection} will call
30   * each contained handler in turn until either an exception is thrown, the response 
31   * is committed or a positive response status is set.
32   */
33  public class HandlerList extends HandlerCollection
34  {
35      /* ------------------------------------------------------------ */
36      /* 
37       * @see org.mortbay.jetty.EventHandler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
38       */
39      public void handle(String target, HttpServletRequest request, HttpServletResponse response, int dispatch) 
40          throws IOException, ServletException
41      {
42          Handler[] handlers = getHandlers();
43          
44          if (handlers!=null && isStarted())
45          {
46              Request base_request = HttpConnection.getCurrentConnection().getRequest();
47              for (int i=0;i<handlers.length;i++)
48              {
49                  handlers[i].handle(target,request, response, dispatch);
50                  if ( base_request.isHandled())
51                      return;
52              }
53          }
54      }
55  }