Added a few utils and fixed a few warnings

src/com/massivecraft/core/Lang.java

@@ -0,0 +1,11 @@
+package com.massivecraft.core;
+
+public class Lang
+{
+	public static final String permForbidden = "<b>You don't have permission to %s.";
+	public static final String permDoThat = "do that";
+	
+	public static final String commandSenderMustBePlayer = "<b>This command can only be used by ingame players.";
+	public static final String commandToFewArgs = "<b>To few arguments. <i>Use like this:";
+	public static final String commandToManyArgs = "<b>Strange argument \"<p>%s<b>\". <i>Use the command like this:";
+}

src/com/massivecraft/core/lib/gson2/Gson.java

@@ -400,7 +400,7 @@ public final class Gson {
    * @return Json representation of {@code src}
    * @since 1.4
    */
-  @SuppressWarnings({"unchecked", "rawtypes"}) // the caller is required to make src and typeOfSrc consistent
+  // the caller is required to make src and typeOfSrc consistent
   public JsonElement toJsonTree(Object src, Type typeOfSrc) {
     JsonElementWriter writer = new JsonElementWriter();
     toJson(src, typeOfSrc, writer);
@@ -682,6 +682,7 @@ public final class Gson {
    * @throws JsonSyntaxException if json is not a valid representation for an object of type
    * @since 1.2
    */
+  @SuppressWarnings("unchecked")
 public <T> T fromJson(Reader json, Type typeOfT) throws JsonIOException, JsonSyntaxException {
     JsonReader jsonReader = new JsonReader(json);
     T object = (T) fromJson(jsonReader, typeOfT);
@@ -777,6 +778,7 @@ public final class Gson {
    * @throws JsonSyntaxException if json is not a valid representation for an object of type typeOfT
    * @since 1.3
    */
+  @SuppressWarnings("unchecked")
 public <T> T fromJson(JsonElement json, Type typeOfT) throws JsonSyntaxException {
     if (json == null) {
       return null;

src/com/massivecraft/core/lib/gson2/GsonToMiniGsonTypeAdapterFactory.java

@@ -39,6 +39,7 @@ final class GsonToMiniGsonTypeAdapterFactory implements TypeAdapter.Factory {
     this.deserializers = deserializers;
 
     this.deserializationContext = new JsonDeserializationContext() {
+      @SuppressWarnings("unchecked")
 	public <T> T deserialize(JsonElement json, Type typeOfT) throws JsonParseException {
         return (T) gson.fromJson(json, typeOfT);
       }

src/com/massivecraft/core/util/ClassLoadHack.java

@@ -0,0 +1,50 @@
+package com.massivecraft.core.util;
+
+import java.io.File;
+import java.lang.reflect.Method;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+
+public class ClassLoadHack
+{
+	private static URLClassLoader sysloader = (URLClassLoader)ClassLoader.getSystemClassLoader();
+	
+	public static boolean load(String filename)
+	{
+		return load(new File(filename));
+	}
+	
+	public static boolean load(File file)
+	{
+		try
+		{
+			return load(file.toURI().toURL());
+		} 
+		catch (MalformedURLException e)
+		{
+			return false;
+		}
+	}
+	
+	public static boolean load(URL url) 
+	{
+		// If the file already is loaded we can skip it
+		for (URL otherUrl : sysloader.getURLs())
+		{
+			if (otherUrl.sameFile(url)) return true;
+		}
+		
+		try
+		{
+			Method addURLMethod = URLClassLoader.class.getDeclaredMethod("addURL", new Class[]{ URL.class });
+			addURLMethod.setAccessible(true);
+			addURLMethod.invoke(sysloader, new Object[]{ url });
+			return true;
+		}
+		catch (Exception e)
+		{
+			return false;
+		}
+	}
+}

src/com/massivecraft/core/util/PermUtil.java

@@ -0,0 +1,68 @@
+package com.massivecraft.core.util;
+
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.permissions.Permission;
+
+import com.massivecraft.core.Lang;
+
+public class PermUtil
+{
+	public static String getPermissionDescription (String perm)
+	{
+		if (perm == null) return Lang.permDoThat;
+		Permission permission = Bukkit.getPluginManager().getPermission(perm);
+		return getPermissionDescription(permission);
+	}
+	
+	public static String getPermissionDescription (Permission perm)
+	{
+		if (perm == null) return Lang.permDoThat;
+		String desc = perm.getDescription();
+		if (desc == null || desc.length() == 0) return Lang.permDoThat;
+		return desc;
+	}
+	
+	public String getForbiddenMessage(String perm)
+	{
+		return null;
+		// TODO: Decouple the text util.
+		//return p.txt.parse(Lang.permForbidden, getPermissionDescription(perm));
+	}
+	
+	public boolean has (CommandSender me, String perm)
+	{
+		if (me == null) return false;
+		return me.hasPermission(perm);
+	}
+	
+	public boolean has (CommandSender me, String perm, boolean verbose)
+	{
+		if (has(me, perm))
+		{
+			return true;
+		}
+		else if (verbose && me != null)
+		{
+			me.sendMessage(this.getForbiddenMessage(perm));
+		}
+		return false;
+	}
+	
+	public <T> T pickFirstVal(CommandSender me, Map<String, T> perm2val)
+	{
+		if (perm2val == null) return null;
+		T ret = null;
+		
+		for ( Entry<String, T> entry : perm2val.entrySet())
+		{
+			ret = entry.getValue();
+			if (has(me, entry.getKey())) break;
+		}
+		
+		return ret;
+	}
+}

src/com/massivecraft/core/util/SmokeUtil.java

@@ -0,0 +1,91 @@
+package com.massivecraft.core.util;
+
+import java.util.Collection;
+import java.util.Random;
+
+import org.bukkit.Effect;
+import org.bukkit.Location;
+
+// http://mc.kev009.com/Protocol
+// -----------------------------
+// Smoke Directions 
+// -----------------------------
+// Direction ID    Direction
+//            0    South - East
+//            1    South
+//            2    South - West
+//            3    East
+//            4    (Up or middle ?)
+//            5    West
+//            6    North - East
+//            7    North
+//            8    North - West
+//-----------------------------
+
+public class SmokeUtil
+{
+	public static Random random = new Random();
+	
+	// -------------------------------------------- //
+	// Spawn once
+	// -------------------------------------------- //
+	
+	// Single ========
+	public static void spawnSingle(Location location, int direction)
+	{
+		if (location == null) return;
+		location.getWorld().playEffect(location, Effect.SMOKE, direction);
+	}
+	
+	public static void spawnSingle(Location location)
+	{
+		spawnSingle(location, 4);
+	}
+	
+	public static void spawnSingleRandom(Location location)
+	{
+		spawnSingle(location, random.nextInt(9));
+	}
+	
+	// Simple Cloud ========
+	public static void spawnCloudSimple(Location location)
+	{
+		for (int i = 0; i <= 8; i++)
+		{
+			spawnSingle(location, i);
+		}
+	}
+	
+	public static void spawnCloudSimple(Collection<Location> locations)
+	{
+		for (Location location : locations)
+		{
+			spawnCloudSimple(location);
+		}
+	}
+	
+	// Random Cloud ========
+	public static void spawnCloudRandom(Location location, float thickness)
+	{
+		int singles = (int) Math.floor(thickness*9);
+		for (int i = 0; i < singles; i++)
+		{
+			spawnSingleRandom(location);
+		}
+	}
+	
+	public static void spawnCloudRandom(Collection<Location> locations, float thickness)
+	{
+		for (Location location : locations)
+		{
+			spawnCloudRandom(location, thickness);
+		}
+	}
+	
+	// -------------------------------------------- //
+	// Attach continuous effects to or locations
+	// -------------------------------------------- //
+	
+	// TODO
+	
+}