Bukkit - MultipleSpawns Plugin example

package net.skdev.spawns;

import java.util.Set;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class MultiSpawns extends JavaPlugin {

    private final MultiSpawns plugin = this;

    private enum SubCmd{ // Sub Command Aliases

        SET     (new String[]{"set","assign"}),
        REMOVE  (new String[]{"remove","rem","rm","delete","del"}),
        SPAWN   (new String[]{"spawn","tp","tele","teleport"});

        private final String s[];

        SubCmd(String s[]){ this.s = s; }

        static SubCmd getCmd(String s){
            for (SubCmd sc : SubCmd.values()){
                for (String v : sc.s){
                    if (v.equalsIgnoreCase(s)) return sc;
                }
            }
            return null;
        }

    }

    private static boolean isInt(String s){
        try{
            Integer.parseInt(s);
            return true;
        }catch(NumberFormatException e){
            return false;
        }
    }

    public void onEnable(){



        plugin.getCommand("ms").setExecutor(new CommandExecutor(){

            @Override
            public boolean onCommand(CommandSender sender, Command cmd,
                    String label, String[] args) {

                SubCmd sc = SubCmd.getCmd(args[0]);

                if (sender instanceof Player){
                    Player p = (Player) sender;
                    switch (sc){

                        case SET: // /ms set <[int] | [int string] | [string] | []>
                            Location loc = p.getLocation();
                            if (p.hasPermission("ms.set")){
                                if (args.length >= 2 && args[1] != null && !(args[1] instanceof String)){

                                    if (isInt(args[1])){
                                        String node = "Spawn." + Integer.parseInt(args[1]);

                                        plugin.getConfig().set(node, null); // overwrite any existing

                                        plugin.getConfig().set(node + ".World", loc.getWorld().getName());
                                        plugin.getConfig().set(node + ".X", loc.getBlockX());
                                        plugin.getConfig().set(node + ".Y", loc.getBlockY());
                                        plugin.getConfig().set(node + ".Z", loc.getBlockZ());
                                        if (args[2] != null){ // int string
                                            plugin.getConfig().set(node + ".Name", args[2]);
                                        }

                                        //TODO: Message to player of successful assignment.
                                    }else{

                                        //TODO: Display Syntax error

                                    }

                                }else{ // Assign unused number [string] | []

                                    Set<String> keys = plugin.getConfig().getKeys(false);
                                    String last = keys.toArray(new String[keys.size()])[keys.size()];
                                    if (isInt(last)){
                                        int i = Integer.parseInt(last) +1;
                                        String node = "Spawn." + i;

                                        plugin.getConfig().set(node, null); // overwrite any existing

                                        plugin.getConfig().set(node + ".World", loc.getWorld().getName());
                                        plugin.getConfig().set(node + ".X", loc.getBlockX());
                                        plugin.getConfig().set(node + ".Y", loc.getBlockY());
                                        plugin.getConfig().set(node + ".Z", loc.getBlockZ());
                                        if (args[1] != null){
                                            plugin.getConfig().set(node + ".Name", args[1]);
                                        }
                                    }else{
                                        // TODO: Display Parse error
                                    }

                                }
                            }
                            break;

                        case REMOVE: // /ms remove <[int] | [string]>
                            if (p.hasPermission("ms.rm")){
                                if (isInt(args[1])){ // Find by id
                                    int i = Integer.parseInt(args[1]);;
                                    plugin.getConfig().set("Spawn." + i , null);

                                    // TODO: Display confirmation message
                                }else{ // Find by name

                                    for (String key : plugin.getConfig().getConfigurationSection("Spawn").getKeys(true)){
                                        if (key.toLowerCase().contains(args[1].toLowerCase())){
                                            String path = plugin.getConfig().getConfigurationSection(key).getParent().getCurrentPath();
                                            plugin.getConfig().set(path, null);
                                        }
                                    }

                                }
                            }
                            break;

                        case SPAWN: // /ms spawn <*|int>
                            // ms.spawn.<*|int>
                            try{

                                int x,y,z;
                                String world;

                                if (isInt(args[1])){ // Find by id
                                    int i = Integer.parseInt(args[1]);
                                    String node = "Spawn." + i;
                                    x = plugin.getConfig().getInt(node + ".X");
                                    y = plugin.getConfig().getInt(node + ".Y");
                                    z = plugin.getConfig().getInt(node + ".Z");
                                    world = plugin.getConfig().getString(node + ".World");
                                    Location newLoc = new Location(Bukkit.getWorld(world), x, y, z);
                                    p.teleport(newLoc);

                                }else{ // Find by name
                                    for (String key : plugin.getConfig().getConfigurationSection("Spawn").getKeys(true)){
                                        if (key.toLowerCase().contains(args[1].toLowerCase())){

                                            String path = plugin.getConfig().getConfigurationSection(key).getParent().getCurrentPath();
                                            x = plugin.getConfig().getInt(path + ".X");
                                            y = plugin.getConfig().getInt(path + ".Y");
                                            z = plugin.getConfig().getInt(path + ".Z");
                                            world = plugin.getConfig().getString(path + ".World");
                                            Location newLoc = new Location(Bukkit.getWorld(world), x, y, z);
                                            p.teleport(newLoc);

                                            break;
                                        }
                                    }
                                }
                            }catch(Exception e){
                                // TODO: Display Config Error, unable to find warp point
                            }
                            break;

                        default:

                    }

                }else{ // Non-player

                    switch (sc){

                        case SET:

                            break;

                        case REMOVE:

                            break;

                        default:

                    }

                }

                return false;
            }

        });

    }

}