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2    * Licensed to the Apache Software Foundation (ASF) under one   *
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17   * under the License.                                           *
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19  
20  
21  
22  package org.apache.james.pop3server;
23  
24  /**
25    * Handles NOOP command
26    */
27  public class UserCmdHandler implements CommandHandler {
28  
29      /**
30       * @see org.apache.james.pop3server.CommandHandler#onCommand(POP3Session)
31       */
32      public void onCommand(POP3Session session) {
33          doUSER(session,session.getCommandArgument());
34      }
35  
36      /**
37       * Handler method called upon receipt of a USER command.
38       * Reads in the user id.
39       *
40       * @param argument the first argument parsed by the parseCommand method
41       */
42      private void doUSER(POP3Session session,String argument) {
43          String responseString = null;
44          if (session.getHandlerState() == POP3Handler.AUTHENTICATION_READY && argument != null) {
45              session.setUser(argument);
46              session.setHandlerState(POP3Handler.AUTHENTICATION_USERSET);
47              responseString = POP3Handler.OK_RESPONSE;
48          } else {
49              responseString = POP3Handler.ERR_RESPONSE;
50          }
51          session.writeResponse(responseString);
52      }
53  
54  
55  }