ForgePatch/forge_common/net/minecraft/src/forge/DimensionManager.java

package net.minecraft.src.forge;

import java.util.Hashtable;
import java.util.logging.Level;

import cpw.mods.fml.common.FMLCommonHandler;

import net.minecraft.src.*;

public class DimensionManager
{
    private static Hashtable<Integer, WorldProvider> providers = new Hashtable<Integer, WorldProvider>();
    private static Hashtable<Integer, Boolean> spawnSettings = new Hashtable<Integer, Boolean>();
    private static Hashtable<Integer, World> worlds = new Hashtable<Integer, World>();
    private static boolean hasInit = false;

    public static boolean registerDimension(int id, WorldProvider provider, boolean keepLoaded)
    {
        if (providers.containsValue(id))
        {
            return false;
        }
        providers.put(id, provider);
        spawnSettings.put(id, keepLoaded);
        return true;
    }

    public static void init()
    {
        if (hasInit)
        {
            return;
        }
        registerDimension( 0, new WorldProviderSurface(), true);
        registerDimension(-1, new WorldProviderHell(),    true);
        registerDimension( 1, new WorldProviderEnd(),     false);
    }

    public static WorldProvider getProvider(int id)
    {
        return providers.get(id);
    }

    public static Integer[] getIDs()
    {
        return providers.keySet().toArray(new Integer[0]);
    }

    public static void setWorld(int id, World world)
    {
        worlds.put(id, world);
    }

    public static World getWorld(int id)
    {
        return worlds.get(id);
    }

    public static World[] getWorlds()
    {
        return worlds.values().toArray(new World[0]);
    }

    public static boolean shouldLoadSpawn(int id)
    {
        return spawnSettings.contains(id) && spawnSettings.get(id);
    }

    static
    {
        init();
    }

	public static WorldProvider createProviderFor(int i) {
		try {
			if (providers.containsKey(i))
				return getProvider(i).getClass().newInstance();
			else
				return null;
		} catch (Exception e) {
			FMLCommonHandler.instance().getFMLLogger().log(Level.SEVERE,String.format("An error occured trying to create an instance of WorldProvider %d (%s)",i,getProvider(i).getClass().getSimpleName()),e);
			throw new RuntimeException(e);
		}
	}
}