001 /****************************************************************
002 * Licensed to the Apache Software Foundation (ASF) under one *
003 * or more contributor license agreements. See the NOTICE file *
004 * distributed with this work for additional information *
005 * regarding copyright ownership. The ASF licenses this file *
006 * to you under the Apache License, Version 2.0 (the *
007 * "License"); you may not use this file except in compliance *
008 * with the License. You may obtain a copy of the License at *
009 * *
010 * http://www.apache.org/licenses/LICENSE-2.0 *
011 * *
012 * Unless required by applicable law or agreed to in writing, *
013 * software distributed under the License is distributed on an *
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
015 * KIND, either express or implied. See the License for the *
016 * specific language governing permissions and limitations *
017 * under the License. *
018 ****************************************************************/
019
020
021
022 package org.apache.james.protocols.smtp.core;
023
024 import java.util.ArrayList;
025 import java.util.Collection;
026
027 import org.apache.james.protocols.api.Request;
028 import org.apache.james.protocols.api.Response;
029 import org.apache.james.protocols.api.handler.CommandHandler;
030 import org.apache.james.protocols.smtp.SMTPResponse;
031 import org.apache.james.protocols.smtp.SMTPRetCode;
032 import org.apache.james.protocols.smtp.SMTPSession;
033 import org.apache.james.protocols.smtp.dsn.DSNStatus;
034
035 /**
036 * Handles RSET command
037 */
038 public class RsetCmdHandler implements CommandHandler<SMTPSession> {
039 /**
040 * The name of the command handled by the command handler
041 */
042 private final static String COMMAND_NAME = "RSET";
043
044 /**
045 * handles RSET command
046 *
047 **/
048 public Response onCommand(SMTPSession session, Request request) {
049 return doRSET(session, request.getArgument());
050 }
051
052
053 /**
054 * Handler method called upon receipt of a RSET command.
055 * Resets message-specific, but not authenticated user, state.
056 *
057 * @param session SMTP session object
058 * @param argument the argument passed in with the command by the SMTP client
059 * @return
060 */
061 private SMTPResponse doRSET(SMTPSession session, String argument) {
062 if ((argument == null) || (argument.length() == 0)) {
063 session.resetState();
064 return new SMTPResponse(SMTPRetCode.MAIL_OK, DSNStatus.getStatus(DSNStatus.SUCCESS,DSNStatus.UNDEFINED_STATUS)+" OK");
065 } else {
066 return new SMTPResponse(SMTPRetCode.SYNTAX_ERROR_COMMAND_UNRECOGNIZED, DSNStatus.getStatus(DSNStatus.PERMANENT,DSNStatus.DELIVERY_INVALID_ARG)+" Unexpected argument provided with RSET command");
067 }
068 }
069
070 /**
071 * @see org.apache.james.protocols.api.handler.CommandHandler#getImplCommands()
072 */
073 public Collection<String> getImplCommands() {
074 Collection<String> implCommands = new ArrayList<String>();
075 implCommands.add(COMMAND_NAME);
076
077 return implCommands;
078 }
079
080 }