diff -r 9f0b95aafaa3 -r ed84c8bdd87b org/sonews/daemon/CommandSelector.java --- a/org/sonews/daemon/CommandSelector.java Sun Aug 29 17:04:25 2010 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,141 +0,0 @@ -/* - * SONEWS News Server - * see AUTHORS for the list of contributors - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -package org.sonews.daemon; - -import java.util.HashMap; -import java.util.Map; -import java.util.Set; -import java.util.concurrent.ConcurrentHashMap; -import org.sonews.daemon.command.Command; -import org.sonews.daemon.command.UnsupportedCommand; -import org.sonews.util.Log; -import org.sonews.util.io.Resource; - -/** - * Selects the correct command processing class. - * @author Christian Lins - * @since sonews/1.0 - */ -public class CommandSelector -{ - - private static Map instances - = new ConcurrentHashMap(); - private static Map> commandClassesMapping - = new ConcurrentHashMap>(); - - static - { - String[] classes = Resource.getAsString("helpers/commands.list", true).split("\n"); - for(String className : classes) - { - if(className.charAt(0) == '#') - { - // Skip comments - continue; - } - - try - { - addCommandHandler(className); - } - catch(ClassNotFoundException ex) - { - Log.get().warning("Could not load command class: " + ex); - } - catch(InstantiationException ex) - { - Log.get().severe("Could not instantiate command class: " + ex); - } - catch(IllegalAccessException ex) - { - Log.get().severe("Could not access command class: " + ex); - } - } - } - - public static void addCommandHandler(String className) - throws ClassNotFoundException, InstantiationException, IllegalAccessException - { - Class clazz = Class.forName(className); - Command cmd = (Command)clazz.newInstance(); - String[] cmdStrs = cmd.getSupportedCommandStrings(); - for (String cmdStr : cmdStrs) - { - commandClassesMapping.put(cmdStr, clazz); - } - } - - public static Set getCommandNames() - { - return commandClassesMapping.keySet(); - } - - public static CommandSelector getInstance() - { - CommandSelector csel = instances.get(Thread.currentThread()); - if(csel == null) - { - csel = new CommandSelector(); - instances.put(Thread.currentThread(), csel); - } - return csel; - } - - private Map commandMapping = new HashMap(); - private Command unsupportedCmd = new UnsupportedCommand(); - - private CommandSelector() - {} - - public Command get(String commandName) - { - try - { - commandName = commandName.toUpperCase(); - Command cmd = this.commandMapping.get(commandName); - - if(cmd == null) - { - Class clazz = commandClassesMapping.get(commandName); - if(clazz == null) - { - cmd = this.unsupportedCmd; - } - else - { - cmd = (Command)clazz.newInstance(); - this.commandMapping.put(commandName, cmd); - } - } - else if(cmd.isStateful()) - { - cmd = cmd.getClass().newInstance(); - } - - return cmd; - } - catch(Exception ex) - { - ex.printStackTrace(); - return this.unsupportedCmd; - } - } - -}