Reloading a PLUGIN

Hello!

I was wondering if I can create a command that reloads the actual .jar of the plugin - Not the config file.

Here is the code I have.

Code:java

  if(commandLabel.equalsIgnoreCase("umsfreload")) {
                    if (args.length > 0) {
                        sender.sendMessage(prefix + ChatColor.RED + "Syntax Error!\nUsage: /umsfreload ");
                        return false;
                    }
                    if (sender instanceof Player) {
 
                        if (player.hasPermission(new Permissions().umsfreload)) {
                            plugin.getPluginLoader().disablePlugin(plugin);
                            plugin.getPluginLoader().enablePlugin(plugin);
                            sender.sendMessage(ChatColor.GREEN + "Reloaded "+ ChatColor.GRAY + "UnitedMcSvrs - Factions!");
                        } else {
                            sender.sendMessage(prefix + ChatColor.RED + "You do not have access to that.");
                        }
                    } else {
                        plugin.getPluginLoader().disablePlugin(plugin);
                        plugin.getPluginLoader().enablePlugin(plugin);
                        sender.sendMessage(prefix + ChatColor.GREEN + "Reloaded "+ ChatColor.GRAY + "UnitedMcSvrs - Factions!");
                    }
                    return true;
                }

I have tried

Code:java

  plugin.getPluginLoader().disablePlugin(plugin);
                            plugin.getPluginLoader().enablePlugin(plugin);

But it throws off a NPE.


If anyone can tell me where I am going wrong that would be great!

 

CaLxCyMru
getServer().getPluginManager().disablePlugin()

 

I'm currently testing it, but looks like this code will work.
I'm using this in development version of one of my plugins

Code:java

 
PluginManager pluginmanager = Bukkit.getPluginManager();
Class<? extends PluginManager> managerclass = pluginmanager.getClass();
//disable plugin
pluginmanager.disablePlugin(plugin);
//remove from plugins field
Field pluginsField = managerclass.getDeclaredField("plugins");
pluginsField.setAccessible(true);
List<Plugin> plugins = (List<Plugin>) pluginsField.get(pluginmanager);
plugins.remove(plugin);
//remove from lookupnames
Field lookupNamesField = managerclass.getDeclaredField("lookupNames");
lookupNamesField.setAccessible(true);
Map<String, Plugin> lookupNames = (Map<String, Plugin>) lookupNamesField.get(pluginmanager);
lookupNames.remove(plugin.getName());
//remove from command fields
Field commandMapField = managerclass.getDeclaredField("commandMap");
commandMapField.setAccessible(true);
CommandMap commandMap = (CommandMap) commandMapField.get(pluginmanager);
Field knownCommandsField = null;
Map<String, Command> knownCommands = null;
knownCommandsField = commandMap.getClass().getDeclaredField("knownCommands");
knownCommandsField.setAccessible(true);
knownCommands = (Map<String, Command>) knownCommandsField.get(commandMap);
for (String plugincommandName : new HashSet<String>(knownCommands.keySet()))
{
if (knownCommands.get(plugincommandName) instanceof PluginCommand)
{
PluginCommand plugincommand = (PluginCommand) knownCommands.get(plugincommandName);
if (plugincommand.getPlugin().getName().equals(plugin.getName()))
{
plugincommand.unregister(commandMap);
knownCommands.remove(plugincommandName);
}
}
}
//load plugin
File pluginfile = new File(plugin.getClass().getProtectionDomain().getCodeSource().getLocation().getFile());
Plugin p = Bukkit.getPluginManager().loadPlugin(pluginfile);
//enable plugin
pluginmanager.enablePlugin(p);