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    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  package org.apache.mina.example.chat;
    21
    22  /**
    23   * Encapsulates a chat command. Use {@link #valueOf(String)} to create an
    24   * instance given a command string.
    25   *
    26   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    27   */
    28  public class ChatCommand {
    29      public static final int LOGIN = 0;
    30
    31      public static final int QUIT = 1;
    32
    33      public static final int BROADCAST = 2;
    34
    35      private final int num;
    36
    37      private ChatCommand(int num) {
    38          this.num = num;
    39      }
    40
    41      public int toInt() {
    42          return num;
    43      }
    44
    45      public static ChatCommand valueOf(String s) {
    46          s = s.toUpperCase();
    47          if ("LOGIN".equals(s)) {
    48              return new ChatCommand(LOGIN);
    49          }
    50          if ("QUIT".equals(s)) {
    51              return new ChatCommand(QUIT);
    52          }
    53          if ("BROADCAST".equals(s)) {
    54              return new ChatCommand(BROADCAST);
    55          }
    56
    57          throw new IllegalArgumentException("Unrecognized command: " + s);
    58      }
    59  }