WorldData.java

package musaddict.snowgrow;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.World;

public class WorldData {
    private String resourcePath;
    public ArrayList<World> list;

    public WorldData(String resourcePath) {
        this.resourcePath = resourcePath;

        File path = new File(resourcePath);

        if (!path.exists())
            path.mkdir();
    }

    private static ArrayList<UUID> toSerializableMap(ArrayList<World> worldList) {
        ArrayList<UUID> newArrList = new ArrayList<UUID>();

        if (!worldList.isEmpty()) {
            for (World w : worldList) {
                newArrList.add(w.getUID());
            }
        }

        return newArrList;
    }

    public boolean saveWorldData() {
        try {
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(resourcePath + File.separator + "WorldList.data"));
            out.writeObject(toSerializableMap(list));
            out.flush();
            out.close();

            return true;
        }
        catch (IOException e) {
            //SnowGrow.Log(Level.SEVERE, e.getMessage());
            e.getStackTrace();
        }

        return false;
    }

    private static ArrayList<World> fromSerializableMap(ArrayList<UUID> worldNameList) {
        ArrayList<World> worldList = new ArrayList<World>();

        if (!worldNameList.isEmpty())
            for (UUID id : worldNameList) {
                World w = Bukkit.getServer().getWorld(id);

                if (w != null)
                    worldList.add(w);
            }

        return worldList; //May return empty map if no doors to load.
    }

    @SuppressWarnings("unchecked")
    public boolean loadWorldData() {
        try {
            if (new File(resourcePath + File.separator + "WorldList.data").exists()) {
                ObjectInputStream in = new ObjectInputStream(new FileInputStream(resourcePath + File.separator + "WorldList.data"));
                Object result = in.readObject();

                list = fromSerializableMap((ArrayList<UUID>) result);
            }
            else //File dosen't exist, ignore and continue.
                list = new ArrayList<World>();

            return true;
        }
        catch (Exception e) {
            //SnowGrow.Log(Level.SEVERE, e.getMessage());
            e.getStackTrace();
        }

        return false;
    }
}