QueryBlocker

package com.bringholm.queryblocker;

import com.bringholm.queryblocker.bukkitutils.BukkitReflectionUtils;
import com.comphenix.protocol.PacketType;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.PacketAdapter;
import com.comphenix.protocol.events.PacketEvent;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.plugin.java.JavaPlugin;

public class QueryBlocker extends JavaPlugin {
    private String queryResponse = "";
    private String serverSoftware = this.getServerSoftware();
    private String serverVersion = this.getServerVersion();

    @Override
    public void onEnable() {
        this.updateConfig();
        if (!this.getServer().getPluginManager().isPluginEnabled("ProtocolLib")) {
            this.getLogger().severe("ProtocolLib not found! Please install a working version of ProtocolLib, otherwise this plugin will not work!");
            this.setEnabled(false);
            return;
        }
        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(this, PacketType.Status.Server.SERVER_INFO) {
            @Override
            public void onPacketSending(PacketEvent event) {

                /* Field field = PacketStatusOutServerInfo.class.getDeclaredField("b");
                   field.setAccessible(true);
                   ServerPing serverPing = (ServerPing) field.get(event.getPacket().getHandle());
                   ServerPing.ServerData serverData = serverPing.getServerData();
                   serverPing.setServerInfo(new ServerPing.ServerData(queryResponse, serverData.getProtocolVersion())); */

                Object serverPing = BukkitReflectionUtils.getDeclaredField(event.getPacket().getHandle(), "b");
                Object serverData = BukkitReflectionUtils.invokeMethod(serverPing, "getServerData");
                Object newServerData = BukkitReflectionUtils.getAndInvokeNMSConstructor("ServerPing$ServerData", queryResponse, BukkitReflectionUtils.invokeMethod(serverData, "getProtocolVersion"));
                BukkitReflectionUtils.invokeMethod(serverPing, "setServerInfo", newServerData);
            }
        });
    }

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (args.length == 1) {
            if (sender.hasPermission("queryblocker.reload")) {
                this.updateConfig();
                sender.sendMessage(ChatColor.GOLD + "Successfully reloaded the config file!");
            } else {
                sender.sendMessage(ChatColor.RED + "You don't have permission to do this!");
            }
        } else {
            sender.sendMessage(ChatColor.RED + "Invalid arguments!");
        }
        return true;
    }

    private void updateConfig() {
        this.saveDefaultConfig();
        this.reloadConfig();
        queryResponse = !this.getConfig().getString("software").isEmpty() ? this.getConfig().getString("software").replace("%current%", serverSoftware) + " " : "";
        queryResponse += !this.getConfig().getString("version").isEmpty() ? this.getConfig().getString("version").replace("%current%", serverVersion) : "";
    }

    private String getServerSoftware() {
        String software = "";

        /* software = ((CraftServer) Bukkit.getServer()).getServer().getServerModName(); */

        Object minecraftServer = BukkitReflectionUtils.invokeMethod(Bukkit.getServer(), "getServer");
        software = (String) BukkitReflectionUtils.invokeMethod(minecraftServer, "getServerModName");
        return software;
    }

    private String getServerVersion() {
        String version = "";

        /* version = ((CraftServer) Bukkit.getServer()).getServer().getVersion(); */

        Object minecraftServer = BukkitReflectionUtils.invokeMethod(Bukkit.getServer(), "getServer");
        version = (String) BukkitReflectionUtils.invokeMethod(minecraftServer, "getVersion");
        return version;
    }
}