How do I create a new Instance of a DataWatcher on a Packet?

Code:

Code:

package com.Agentleader1.DarkThunder;

import java.lang.reflect.Field;

import net.minecraft.server.v1_7_R4.DataWatcher;
import net.minecraft.server.v1_7_R4.PacketPlayOutEntityDestroy;
import net.minecraft.server.v1_7_R4.PacketPlayOutSpawnEntity;
import net.minecraft.server.v1_7_R4.PacketPlayOutSpawnEntityLiving;
import net.minecraft.server.v1_7_R4.PlayerConnection;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.craftbukkit.v1_7_R4.entity.CraftPlayer;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;

@SuppressWarnings({"deprecation", "unused"})
public class BossBar {
    private int efjnggermkrkfk30rfv;
    public static void start(){
        Bukkit.getScheduler().scheduleSyncRepeatingTask(Main.instance, new Runnable(){
            public void run(){
                for(Player p : Bukkit.getOnlinePlayers()){
                    CraftPlayer player = (CraftPlayer) p;
                    PlayerConnection connection = player.getHandle().playerConnection;
                    try {
                        connection.sendPacket(spawnMob(player.getTargetBlock(null, 6).getState().getLocation()));
                    } catch (SecurityException|NoSuchFieldException|IllegalArgumentException|IllegalAccessException e) {}
                    Bukkit.getScheduler().scheduleSyncDelayedTask(Main.instance, new Runnable(){
                        public void run(){
                            connection.sendPacket(destroyEntity(123));
                        }
                    }, 1);
                }
            }
        }, 20, 5);
    }
    private static PacketPlayOutEntityDestroy destroyEntity(int id)
    {
        return new PacketPlayOutEntityDestroy(id);
    }
    private static PacketPlayOutSpawnEntityLiving spawnMob(Location loc) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException{
        PacketPlayOutSpawnEntityLiving packet = new PacketPlayOutSpawnEntityLiving();
       
         Field a = packet.getClass().getDeclaredField("a");
            Field b = packet.getClass().getDeclaredField("b");
            Field c = packet.getClass().getDeclaredField("c");
            Field d = packet.getClass().getDeclaredField("d");
            Field e = packet.getClass().getDeclaredField("e");
            Field f = packet.getClass().getDeclaredField("f");
            Field g = packet.getClass().getDeclaredField("g");
            Field h = packet.getClass().getDeclaredField("h");
            Field i = packet.getClass().getDeclaredField("i");
            Field j = packet.getClass().getDeclaredField("j");
            Field k = packet.getClass().getDeclaredField("k");
    
            a.setAccessible(true);
            b.setAccessible(true);
            c.setAccessible(true);
            d.setAccessible(true);
            e.setAccessible(true);
            f.setAccessible(true);
            g.setAccessible(true);
            h.setAccessible(true);
            i.setAccessible(true);
            j.setAccessible(true);
            k.setAccessible(true);
    
            a.set(packet, (int) 123); //Entity ID
            b.set(packet, (byte) 64); //Mob type (ID: 64)
            c.set(packet, (int) Math.floor(loc.getBlockX() * 32.0D)); //X positions
            d.set(packet, (int) Math.floor(loc.getBlockY() * 32.0D)); //Y position
            e.set(packet, (int) Math.floor(loc.getBlockZ() * 32.0D)); //Z position
            f.set(packet, (byte) 0); //Pitch
            g.set(packet, (byte) 0); //Head Pitch
            h.set(packet, (byte) 0); //Yaw
    
           
            DataWatcher watcher = new DataWatcher(); //here's the issue, I can't use null for the parameter.
            //watcher.a(0, 0x20); //Flags, 0x20 = invisible
            watcher.a(5, ChatColor.AQUA + "Test"); //Entity name
            watcher.a(6, 0); //Snow name, 1 = show, 0 = don't show
            watcher.a(8, 0); //Firework effects, 0 = none
            watcher.a(16, 1); //Wither health, 300 = full health
    
            try{
                Field t = PacketPlayOutSpawnEntity.class.getDeclaredField("t");
                t.setAccessible(true);
                t.set(packet, watcher);
                t.setAccessible(false);
            } catch(Exception ex){
            }
        return packet;
    }
}

How do I create a DataWatcher for a Packet? The only constructor has a parameter for entity, and I can not use null.

@Comphenix Do you know how to do this without ProtocolLib?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@Agentleader1 I haven't really looked in your code, nor I have done sth with packets (without ProtocolLib) before, but maybe spawn an Entity, grab the watcher and remove it? I think I read that somewhere in an ProtocolLib tutorial, but maybe it will work for you too.

 

@I Al Istannen I'll almost confident it won't work, but I guess its worth a try.

 

Bump. Looking for alternate solutions.

 

@Agentleader1 I know you said without protocollib, and since I don't really have knowledge about that topic I can't help you much. However, as you probably have found already, here is the source of ProtocolLibs WrappedDataWatcher:
https://github.com/dmulloy2/Protoco...nix/protocol/wrappers/WrappedDataWatcher.java