NullPointer

In my code @ Line 50, where I insert my data into my database I keep getting a NPE, and can't seem to figure out why

Code:

package net.thedemise.teams.commands;

import com.mongodb.BasicDBObject;
import net.thedemise.teams.MongoManager;
import net.thedemise.teams.PlayerData;
import net.thedemise.teams.TeamData;
import org.bson.BSONObject;
import org.bson.Document;
import org.bson.types.ObjectId;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import java.util.HashMap;
import java.util.UUID;

public class TeamCommand implements CommandExecutor {
    private MongoManager mongoManager;

    public MongoManager getMongoManager() {
        return mongoManager;
    }

    @Override
    public boolean onCommand(CommandSender commandSender, Command command, String string, String[] args) {
        if (command.getName().equalsIgnoreCase("team")) {
            Player player = (Player) commandSender;
            if(commandSender instanceof Player){
                if (args.length == 0) {
                    player.sendMessage("Team help: ");
                    player.sendMessage("team create");
                } else {
                    if (args[0].equalsIgnoreCase("create")) {
                        player.sendMessage(ChatColor.BLUE + "Please do /team create <name>");
                        if (args.length >= 2) {
                            StringBuilder message = new StringBuilder();
                            for (int i = 1; i < args.length; i++) {
                                message.append(" ").append(args);
                            }
                            String msg = message.toString();
                            ObjectId id = new ObjectId("4f693d40e4b04cde19f17205");
                            BasicDBObject obj = new BasicDBObject();
                            obj.append("_id", id);
                            HashMap<UUID, TeamData> teamDataHashMap = new HashMap<>();
                            BasicDBObject query = new BasicDBObject();
                            query.putAll((BSONObject) query);
                            Document teamdoc = new Document("_id", id);
                            System.out.println("Team created");
                            player.sendMessage(msg + " Has been created!");
                            teamdoc.append("NAME", message.toString());
                            teamdoc.append("owner", player.getName().toString());
                            getMongoManager().players.insertOne(teamdoc);
                            teamDataHashMap.put(player.getUniqueId(), new TeamData(message.toString(), player.getName()));
                        }
                        return true;
                    }
                }
            }else{
                player.sendMessage("Only players can use this command!");
                return true;
            }
        }
        return false;
    }
}

 

Include some line numbers. If it is this line:

PHP:

getMongoManager().players.insertOne(teamdoc);

then my guess would be players is null or getMongoManager() is returning null. Add some debugs like: System.out.println(getMongoManager() == null) & players == null

 

I'd have to agree, I do not see where you initialize mongoManager. It is not static either, so I believe the way its currently written, it will always be null.

I do not know how your mongoManager class works but you should initialize it, either with

Code:

private MongoManager mongoManager =  new MongoManager(/*params*/);

or in the constructor for your commandExecutor (make one)

Code:

public TeamCommand(/*params*/) {
  //Stuff
  mongoManager = new MongoManager(/*params*/);
  //More stuff
}