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 */
020package org.apache.mina.example.chat;
021
022/**
023 * Encapsulates a chat command. Use {@link #valueOf(String)} to create an
024 * instance given a command string.
025 *
026 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
027 */
028public class ChatCommand {
029    public static final int LOGIN = 0;
030
031    public static final int QUIT = 1;
032
033    public static final int BROADCAST = 2;
034
035    private final int num;
036
037    private ChatCommand(int num) {
038        this.num = num;
039    }
040
041    public int toInt() {
042        return num;
043    }
044
045    public static ChatCommand valueOf(String s) {
046        s = s.toUpperCase();
047        if ("LOGIN".equals(s)) {
048            return new ChatCommand(LOGIN);
049        }
050        if ("QUIT".equals(s)) {
051            return new ChatCommand(QUIT);
052        }
053        if ("BROADCAST".equals(s)) {
054            return new ChatCommand(BROADCAST);
055        }
056
057        throw new IllegalArgumentException("Unrecognized command: " + s);
058    }
059}