Checking properties

How can I check if a property exists ?

Here is my main class :

Code:java

 
package me.beatcomet.Freeze;
 
import java.io.File;
import java.util.logging.Logger;
 
import org.bukkit.event.Event;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.util.config.Configuration;
 
public class Frz extends JavaPlugin{
 
	//Getting info from plugin.yml
	PluginDescriptionFile PDFile = this.getDescription();
	//Creating a new data file
	File configFile = new File("plugins/" + PDFile.getName()
			+ "/data.dat");
	Configuration config = new Configuration(configFile);
	//getting Minecraft logger to send console messages
	Logger log = Logger.getLogger("Minecraft");
	//creating Player Listener reference
	PListener playerListener = new PListener(this);
	//What happens when the plugin is being disabled
	public void onDisable(){
		//saving the data
		config.save();
		//sending console message saying the plugin has been disabled
		log.info(PDFile.getName() + " Version " + PDFile.getVersion() + " is DISABLED!");
	}
	public void onEnable(){
		//Sending a console message saying the plugin has been enabled
		log.info(PDFile.getName() + " Version " + PDFile.getVersion() + " is ENABLED!");
		//making a new file if a data file dose not exist
		new File("plugins/" + PDFile.getName()).mkdir();
		if (!configFile.exists()) {
			try {
				configFile.createNewFile();
 
			} catch (Exception e) {
				//sending console message in case the data file could not be created
				log.info("[GlassBreak] Error when creating config file.");
			}
		}
		//Loading data file
		config.load();
		//getting the plugin manager to register events
		PluginManager pm = this.getServer().getPluginManager();
		//player join event registration
		pm.registerEvent(Event.Type.PLAYER_JOIN, playerListener, Event.Priority.Normal, this);
	}
}
 

I'm trying to check if the config file contains a player's name onPlayerJoinEvent but I have no idea how...

 

I believe you could use config.getNode, but I'm a huge noob, so I don't really know.

 

if the player's name is contained at the top level:

Code:

public void onPlayerJoin(PlayerJoinEvent event) {
  if (Frz.config.getKeys(event.getPlayer().getName()) != null) {
    // do stuff here
  }
}

This will check the top level of your config file (the first node) for a key equal to the joining player's name, and return a List<String> containing all of the keys directly underneath it

If you just want to check the value of the key (for example, if the file is "krinsdeath: 13" and contains the number of times I've logged in), you'd do the following:

Code:

Frz.config.getInt(event.getPlayer().getName(), 1);

Where the "1" indicates some default value if the key returns null or doesn't exist

 

can I use this one ?

Code:java

 
Player player = event.getName();
String name = p.getName();
if (!(plugin.config.getBoolean(name, true)|| plugin.config.getBoolean(name, false))
{
//do something if the players name value is not true or false.
}else
{
//do something if the players name value is true/false.
}
 

 

That if statement is really ambiguous. You're giving two different default values (one will return true if the key doesn't exist, the other will return false)

You don't need the ||. If you want to check if the value is true or, if there is no value, default it to true, specify a default of true -> else (the value is returned as false successfully) do something else:

Code:

if (plugin.config.getBoolean(name, false)) {
  // the name was found and had a value of true
} else {
  // the name was not found, OR the value returned was false
}

 

The idea is that the player enters and the plugin checks if the player appears in the data file.
so I tried checking if the player's name value is true/false.
If it is true or false, the plyer exists in the data file.
If it's not the player dose not exist in the data file.

Do you understand what I tried to do?

What you gave me just checks if the value is false or true, but I this value will be used later on , after the admin will use a command.

 

In that case, you want to do:

Code:

if (plugin.config.getProperty(player.getName()) != null) {
  // player name was found and had a value
} else {
  // player name wasn't found
}

 

Thanks,

I have another question,
I'm using onCommand, and I need to check if args[0] equals to a players name in the config.
How can I do that?

 

Code:

if (sender instanceof Player) {
  if (((Player) sender).getServer().getPlayer(arg[0]) != null) {
    // do stuff here
  }
}

edit: sorry, that's to check if the player is online

if you want to check it against the config file, do the same thing:

Code:

if (plugin.config.getProperty(arg[0]) != null) {
  // do stuff
}

edit 2: if you need more help tonight you'll be on your own, my eyes are shutting of their own accord at the moment

good luck

 

lol thanks a lot !!
You are the best

Here is what I did few seconds after I posted the comment

Code:java

 
if(commandLabel.equalsIgnoreCase("Freeze") || commandLabel.equalsIgnoreCase("f")){
				String name = args[0];
				if((Boolean) plugin.config.getProperty(name) == false){
					plugin.config.setProperty(name, true);
				}
				if((Boolean) plugin.config.getProperty(name) == true){
					plugin.config.setProperty(name, false);
				}
			}
 

 

Hi,

I am not an expert in Java programming, just have basic knowledge, however, I am wondering why this works:

Code:

public class Frz extends JavaPlugin{

//Getting info from plugin.yml
PluginDescriptionFile PDFile = this.getDescription();

When "this.getDescription()" is called, the object has not run through its whole instantiation process which in turn means that "this" cannot be resolved yet. It should throw an NPE or such.

Where is the mistake in my thinking?