View Javadoc

1   /****************************************************************
2    * Licensed to the Apache Software Foundation (ASF) under one   *
3    * or more contributor license agreements.  See the NOTICE file *
4    * distributed with this work for additional information        *
5    * regarding copyright ownership.  The ASF licenses this file   *
6    * to you under the Apache License, Version 2.0 (the            *
7    * "License"); you may not use this file except in compliance   *
8    * with the License.  You may obtain a copy of the License at   *
9    *                                                              *
10   *   http://www.apache.org/licenses/LICENSE-2.0                 *
11   *                                                              *
12   * Unless required by applicable law or agreed to in writing,   *
13   * software distributed under the License is distributed on an  *
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
15   * KIND, either express or implied.  See the License for the    *
16   * specific language governing permissions and limitations      *
17   * under the License.                                           *
18   ****************************************************************/
19  
20  
21  
22  package org.apache.james.pop3server;
23  
24  /**
25    * Handles NOOP command
26    */
27  public class NoopCmdHandler implements CommandHandler {
28  
29      /**
30       * @see org.apache.james.pop3server.CommandHandler#onCommand(POP3Session)
31       */
32      public void onCommand(POP3Session session) {
33          doNOOP(session,session.getCommandArgument());
34      }
35  
36      /**
37       * Handler method called upon receipt of a NOOP command.
38       * Like all good NOOPs, does nothing much.
39       *
40       * @param argument the first argument parsed by the parseCommand method
41       */
42      private void doNOOP(POP3Session session,String argument) {
43          String responseString = null;
44          if (session.getHandlerState() == POP3Handler.TRANSACTION) {
45              responseString = POP3Handler.OK_RESPONSE;
46              session.writeResponse(responseString);
47          } else {
48              responseString = POP3Handler.ERR_RESPONSE;
49              session.writeResponse(responseString);
50          }
51      }
52  
53  
54  }