diff -r 1090e2141798 -r 2fdc9cc89502 org/sonews/daemon/CommandSelector.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org/sonews/daemon/CommandSelector.java	Wed Jul 22 14:04:05 2009 +0200
@@ -0,0 +1,110 @@
+/*
+ *   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 <http://www.gnu.org/licenses/>.
+ */
+
+package org.sonews.daemon;
+
+import java.util.HashMap;
+import java.util.Map;
+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
+ */
+class CommandSelector
+{
+
+  private static Map<Thread, CommandSelector> instances
+    = new ConcurrentHashMap<Thread, CommandSelector>();
+  
+  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<String, Command> commandMapping = new HashMap<String, Command>();
+  private Command              unsupportedCmd = new UnsupportedCommand();
+
+  private CommandSelector()
+  {
+    String[] classes = Resource.getAsString("helpers/commands.list", true).split("\n");
+    for(String className : classes)
+    {
+      try
+      {
+        Class<?> clazz   = Class.forName(className);
+        Command  cmd     = (Command)clazz.newInstance();
+        String[] cmdStrs = cmd.getSupportedCommandStrings();
+        for(String cmdStr : cmdStrs)
+        {
+          this.commandMapping.put(cmdStr, cmd);
+        }
+      }
+      catch(ClassNotFoundException ex)
+      {
+        Log.msg("Could not load command class: " + ex, false);
+      }
+      catch(InstantiationException ex)
+      {
+        Log.msg("Could not instantiate command class: " + ex, false);
+      }
+      catch(IllegalAccessException ex)
+      {
+        Log.msg("Could not access command class: " + ex, false);
+      }
+    }
+  }
+
+  public Command get(String commandName)
+  {
+    try
+    {
+      commandName = commandName.toUpperCase();
+      Command cmd = this.commandMapping.get(commandName);
+
+      if(cmd == null)
+      {
+        return this.unsupportedCmd;
+      }
+      else if(cmd.isStateful())
+      {
+        return cmd.getClass().newInstance();
+      }
+      else
+      {
+        return cmd;
+      }
+    }
+    catch(Exception ex)
+    {
+      ex.printStackTrace();
+      return this.unsupportedCmd;
+    }
+  }
+
+}