1.1 --- a/org/sonews/daemon/CommandSelector.java Sun Aug 29 17:04:25 2010 +0200
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,141 +0,0 @@
1.4 -/*
1.5 - * SONEWS News Server
1.6 - * see AUTHORS for the list of contributors
1.7 - *
1.8 - * This program is free software: you can redistribute it and/or modify
1.9 - * it under the terms of the GNU General Public License as published by
1.10 - * the Free Software Foundation, either version 3 of the License, or
1.11 - * (at your option) any later version.
1.12 - *
1.13 - * This program is distributed in the hope that it will be useful,
1.14 - * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.15 - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.16 - * GNU General Public License for more details.
1.17 - *
1.18 - * You should have received a copy of the GNU General Public License
1.19 - * along with this program. If not, see <http://www.gnu.org/licenses/>.
1.20 - */
1.21 -
1.22 -package org.sonews.daemon;
1.23 -
1.24 -import java.util.HashMap;
1.25 -import java.util.Map;
1.26 -import java.util.Set;
1.27 -import java.util.concurrent.ConcurrentHashMap;
1.28 -import org.sonews.daemon.command.Command;
1.29 -import org.sonews.daemon.command.UnsupportedCommand;
1.30 -import org.sonews.util.Log;
1.31 -import org.sonews.util.io.Resource;
1.32 -
1.33 -/**
1.34 - * Selects the correct command processing class.
1.35 - * @author Christian Lins
1.36 - * @since sonews/1.0
1.37 - */
1.38 -public class CommandSelector
1.39 -{
1.40 -
1.41 - private static Map<Thread, CommandSelector> instances
1.42 - = new ConcurrentHashMap<Thread, CommandSelector>();
1.43 - private static Map<String, Class<?>> commandClassesMapping
1.44 - = new ConcurrentHashMap<String, Class<?>>();
1.45 -
1.46 - static
1.47 - {
1.48 - String[] classes = Resource.getAsString("helpers/commands.list", true).split("\n");
1.49 - for(String className : classes)
1.50 - {
1.51 - if(className.charAt(0) == '#')
1.52 - {
1.53 - // Skip comments
1.54 - continue;
1.55 - }
1.56 -
1.57 - try
1.58 - {
1.59 - addCommandHandler(className);
1.60 - }
1.61 - catch(ClassNotFoundException ex)
1.62 - {
1.63 - Log.get().warning("Could not load command class: " + ex);
1.64 - }
1.65 - catch(InstantiationException ex)
1.66 - {
1.67 - Log.get().severe("Could not instantiate command class: " + ex);
1.68 - }
1.69 - catch(IllegalAccessException ex)
1.70 - {
1.71 - Log.get().severe("Could not access command class: " + ex);
1.72 - }
1.73 - }
1.74 - }
1.75 -
1.76 - public static void addCommandHandler(String className)
1.77 - throws ClassNotFoundException, InstantiationException, IllegalAccessException
1.78 - {
1.79 - Class<?> clazz = Class.forName(className);
1.80 - Command cmd = (Command)clazz.newInstance();
1.81 - String[] cmdStrs = cmd.getSupportedCommandStrings();
1.82 - for (String cmdStr : cmdStrs)
1.83 - {
1.84 - commandClassesMapping.put(cmdStr, clazz);
1.85 - }
1.86 - }
1.87 -
1.88 - public static Set<String> getCommandNames()
1.89 - {
1.90 - return commandClassesMapping.keySet();
1.91 - }
1.92 -
1.93 - public static CommandSelector getInstance()
1.94 - {
1.95 - CommandSelector csel = instances.get(Thread.currentThread());
1.96 - if(csel == null)
1.97 - {
1.98 - csel = new CommandSelector();
1.99 - instances.put(Thread.currentThread(), csel);
1.100 - }
1.101 - return csel;
1.102 - }
1.103 -
1.104 - private Map<String, Command> commandMapping = new HashMap<String, Command>();
1.105 - private Command unsupportedCmd = new UnsupportedCommand();
1.106 -
1.107 - private CommandSelector()
1.108 - {}
1.109 -
1.110 - public Command get(String commandName)
1.111 - {
1.112 - try
1.113 - {
1.114 - commandName = commandName.toUpperCase();
1.115 - Command cmd = this.commandMapping.get(commandName);
1.116 -
1.117 - if(cmd == null)
1.118 - {
1.119 - Class<?> clazz = commandClassesMapping.get(commandName);
1.120 - if(clazz == null)
1.121 - {
1.122 - cmd = this.unsupportedCmd;
1.123 - }
1.124 - else
1.125 - {
1.126 - cmd = (Command)clazz.newInstance();
1.127 - this.commandMapping.put(commandName, cmd);
1.128 - }
1.129 - }
1.130 - else if(cmd.isStateful())
1.131 - {
1.132 - cmd = cmd.getClass().newInstance();
1.133 - }
1.134 -
1.135 - return cmd;
1.136 - }
1.137 - catch(Exception ex)
1.138 - {
1.139 - ex.printStackTrace();
1.140 - return this.unsupportedCmd;
1.141 - }
1.142 - }
1.143 -
1.144 -}