Seems to work for 1.7.2 (which doesn't have UUIDs)

PlotSquared/src/main/java/com/intellectualcrafters/plot/PlotMain.java

@@ -52,6 +52,7 @@ import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.generator.ChunkGenerator;
+import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.RegisteredServiceProvider;
 import org.bukkit.plugin.java.JavaPlugin;
 
@@ -74,7 +75,7 @@ import java.util.concurrent.TimeUnit;
  */
 @SuppressWarnings("unused")
 public class PlotMain extends JavaPlugin {
-
+    private static PlotMain main = null;
     /**
      * Permission that allows for "everything"
      */
@@ -681,7 +682,7 @@ public class PlotMain extends JavaPlugin {
      * @return (this class)
      */
     public static PlotMain getMain() {
-        return JavaPlugin.getPlugin(PlotMain.class);
+        return PlotMain.main;
     }
 
     /**
@@ -718,7 +719,7 @@ public class PlotMain extends JavaPlugin {
             return 0;
         }
         OfflinePlayer player;
-        if (((player = Bukkit.getOfflinePlayer(uuid)) == null) || !player.hasPlayedBefore()) {
+        if (((player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid)) == null) || !player.hasPlayedBefore()) {
             return 0;
         }
         return player.getLastPlayed();
@@ -1388,6 +1389,7 @@ public class PlotMain extends JavaPlugin {
     @Override
     @SuppressWarnings("deprecation")
     final public void onEnable() {
+        PlotMain.main = this;
         // Setup the logger mechanics
         setupLogger();
         // Setup translations

PlotSquared/src/main/java/com/intellectualcrafters/plot/api/PlotAPI.java

@@ -124,7 +124,7 @@ public class PlotAPI {
      * @see com.intellectualcrafters.plot.PlotMain
      */
     public PlotAPI(@NotNull final JavaPlugin plugin) {
-        this.plotMain = JavaPlugin.getPlugin(PlotMain.class);
+        this.plotMain = PlotMain.getMain();
         if (plotMain == null) {
             throw new PlotSquaredException(PlotSquaredException.PlotError.PLOTMAIN_NULL, "Failed to fetch the plotmain instance, Plot API for " + plugin.getName() + " will be disabled");
         }

PlotSquared/src/main/java/com/intellectualcrafters/plot/commands/Database.java

@@ -6,6 +6,8 @@ import com.intellectualcrafters.plot.database.SQLManager;
 import com.intellectualcrafters.plot.object.Plot;
 import com.intellectualcrafters.plot.util.PlayerFunctions;
 import com.intellectualcrafters.plot.util.StringComparison;
+import com.intellectualcrafters.plot.util.UUIDHandler;
+
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.Plugin;
@@ -36,7 +38,7 @@ public class Database extends SubCommand {
         if (uuid == null) {
             PlotMain.sendConsoleSenderMessage(msg);
         } else {
-            Player p = Bukkit.getPlayer(uuid);
+            Player p = UUIDHandler.uuidWrapper.getPlayer(uuid);
             if (p != null && p.isOnline())
                 return PlayerFunctions.sendMessage(p, msg);
             else
@@ -46,7 +48,7 @@ public class Database extends SubCommand {
     }
 
     public static void insertPlots(final SQLManager manager, final UUID requester, final Connection c) {
-        Plugin p = PlotMain.getPlugin(PlotMain.class);
+        Plugin p = PlotMain.getMain();
         final java.util.Set<Plot> plots = PlotMain.getPlots();
         p.getServer().getScheduler().runTaskAsynchronously(p, new Runnable() {
             @Override
@@ -100,7 +102,7 @@ public class Database extends SubCommand {
                 Connection n;
                 try {
                     n = new MySQL(
-                            PlotMain.getPlugin(PlotMain.class),
+                            PlotMain.getMain(),
                             host,
                             port,
                             database,

PlotSquared/src/main/java/com/intellectualcrafters/plot/commands/Denied.java

@@ -30,6 +30,7 @@ import com.intellectualcrafters.plot.util.PlayerFunctions;
 import com.intellectualcrafters.plot.util.UUIDHandler;
 
 import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 
 import java.util.UUID;
@@ -70,13 +71,18 @@ public class Denied extends SubCommand {
                     PlayerFunctions.sendMessage(plr, C.ALREADY_OWNER);
                     return false;
                 }
+                OfflinePlayer player = null;
                 if (plot.trusted.contains(uuid)) {
                     plot.trusted.remove(uuid);
-                    DBFunc.removeTrusted(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(uuid));
+                    player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
+                    DBFunc.removeTrusted(plr.getWorld().getName(), plot, player);
                 }
                 if (plot.helpers.contains(uuid)) {
                     plot.helpers.remove(uuid);
-                    DBFunc.removeHelper(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(uuid));
+                    if (player == null) {
+                        player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
+                    }
+                    DBFunc.removeHelper(plr.getWorld().getName(), plot, player);
                 }
                 plot.addDenied(uuid);
                 DBFunc.setDenied(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(args[1]));
@@ -86,11 +92,12 @@ public class Denied extends SubCommand {
                 PlayerFunctions.sendMessage(plr, C.ALREADY_ADDED);
                 return false;
             }
-            if (!uuid.equals(DBFunc.everyone) && (Bukkit.getPlayer(uuid) != null) && Bukkit.getPlayer(uuid).isOnline()) {
+            Player player = UUIDHandler.uuidWrapper.getPlayer(uuid);
-                final Plot pl = PlayerFunctions.getCurrentPlot(Bukkit.getPlayer((uuid)));
+            if (!uuid.equals(DBFunc.everyone) && (player != null) && player.isOnline()) {
+                final Plot pl = PlayerFunctions.getCurrentPlot(player);
                 if ((pl != null) && pl.id.equals(plot.id)) {
-                    PlayerFunctions.sendMessage(Bukkit.getPlayer(uuid), C.YOU_BE_DENIED);
+                    PlayerFunctions.sendMessage(player, C.YOU_BE_DENIED);
-                    Bukkit.getPlayer(uuid).teleport(Bukkit.getPlayer(uuid).getWorld().getSpawnLocation());
+                    player.teleport(player.getWorld().getSpawnLocation());
                 }
             }
             PlayerFunctions.sendMessage(plr, C.DENIED_ADDED);

PlotSquared/src/main/java/com/intellectualcrafters/plot/commands/Helpers.java

@@ -30,6 +30,7 @@ import com.intellectualcrafters.plot.util.PlayerFunctions;
 import com.intellectualcrafters.plot.util.UUIDHandler;
 
 import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 
 import java.util.UUID;
@@ -68,13 +69,18 @@ public class Helpers extends SubCommand {
                     PlayerFunctions.sendMessage(plr, C.ALREADY_OWNER);
                     return false;
                 }
+                OfflinePlayer player = null;
                 if (plot.trusted.contains(uuid)) {
                     plot.trusted.remove(uuid);
-                    DBFunc.removeTrusted(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(uuid));
+                    player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
+                    DBFunc.removeTrusted(plr.getWorld().getName(), plot, player);
                 }
                 if (plot.denied.contains(uuid)) {
                     plot.denied.remove(uuid);
-                    DBFunc.removeDenied(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(uuid));
+                    if (player == null) {
+                        player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
+                    }
+                    DBFunc.removeDenied(plr.getWorld().getName(), plot, player);
                 }
                 plot.addHelper(uuid);
                 DBFunc.setHelper(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(args[1]));

PlotSquared/src/main/java/com/intellectualcrafters/plot/commands/Info.java

@@ -115,7 +115,7 @@ public class Info extends SubCommand {
 
         String owner = "none";
         if (plot.owner != null) {
-            owner = Bukkit.getOfflinePlayer(plot.owner).getName();
+            owner = UUIDHandler.uuidWrapper.getOfflinePlayer(plot.owner).getName();
         }
         if (owner == null) {
             owner = plot.owner.toString();
@@ -179,7 +179,7 @@ public class Info extends SubCommand {
 
         String owner = "none";
         if (plot.owner != null) {
-            owner = Bukkit.getOfflinePlayer(plot.owner).getName();
+            owner = UUIDHandler.uuidWrapper.getOfflinePlayer(plot.owner).getName();
         }
         if (owner == null) {
             owner = plot.owner.toString();

PlotSquared/src/main/java/com/intellectualcrafters/plot/commands/Trusted.java

@@ -30,6 +30,7 @@ import com.intellectualcrafters.plot.util.PlayerFunctions;
 import com.intellectualcrafters.plot.util.UUIDHandler;
 
 import org.bukkit.Bukkit;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 
 import java.util.UUID;
@@ -69,13 +70,18 @@ public class Trusted extends SubCommand {
                     PlayerFunctions.sendMessage(plr, C.ALREADY_OWNER);
                     return false;
                 }
+                OfflinePlayer player = null;
                 if (plot.helpers.contains(uuid)) {
                     plot.helpers.remove(uuid);
-                    DBFunc.removeHelper(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(uuid));
+                    player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
+                    DBFunc.removeHelper(plr.getWorld().getName(), plot, player);
                 }
                 if (plot.denied.contains(uuid)) {
                     plot.denied.remove(uuid);
-                    DBFunc.removeDenied(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(uuid));
+                    if (player == null) {
+                        player = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
+                    }
+                    DBFunc.removeDenied(plr.getWorld().getName(), plot, player);
                 }
                 plot.addTrusted(uuid);
                 DBFunc.setTrusted(plr.getWorld().getName(), plot, Bukkit.getOfflinePlayer(args[1]));

PlotSquared/src/main/java/com/intellectualcrafters/plot/commands/plugin.java

@@ -91,7 +91,7 @@ public class plugin extends SubCommand {
 
     @Override
     public boolean execute(final Player plr, final String... args) {
-        Bukkit.getScheduler().runTaskAsynchronously(JavaPlugin.getPlugin(PlotMain.class), new Runnable() {
+        Bukkit.getScheduler().runTaskAsynchronously(PlotMain.getMain(), new Runnable() {
             @Override
             public void run() {
                 final ArrayList<String> strings = new ArrayList<String>() {

PlotSquared/src/main/java/com/intellectualcrafters/plot/config/C.java

@@ -439,7 +439,7 @@ public enum C {
             manager = new TranslationManager();
         }
         if (defaultFile == null) {
-            defaultFile = new YamlTranslationFile(BukkitTranslation.getParent(PlotMain.getPlugin(PlotMain.class)), lang, "PlotSquared", manager)
+            defaultFile = new YamlTranslationFile(BukkitTranslation.getParent(PlotMain.getMain()), lang, "PlotSquared", manager)
                     .read();
         }
         // register everything in this class

PlotSquared/src/main/java/com/intellectualcrafters/plot/listeners/PlotPlusListener.java

@@ -177,7 +177,8 @@ public class PlotPlusListener extends PlotListener implements Listener {
         }
         if (booleanFlag(plot, "notify-enter")) {
             if (plot.hasOwner()) {
-                final Player player = Bukkit.getPlayer(plot.getOwner());
+                
+                final Player player = UUIDHandler.uuidWrapper.getPlayer(plot.getOwner());
                 if (player == null) {
                     return;
                 }
@@ -216,7 +217,7 @@ public class PlotPlusListener extends PlotListener implements Listener {
         }
         if (booleanFlag(plot, "notify-leave")) {
             if (plot.hasOwner()) {
-                final Player player = Bukkit.getPlayer(plot.getOwner());
+                final Player player = UUIDHandler.uuidWrapper.getPlayer(plot.getOwner());
                 if (player == null) {
                     return;
                 }

PlotSquared/src/main/java/com/intellectualcrafters/plot/listeners/WorldEditListener.java

@@ -31,6 +31,7 @@ import com.intellectualcrafters.plot.object.PlotId;
 import com.intellectualcrafters.plot.util.PWE;
 import com.intellectualcrafters.plot.util.PlayerFunctions;
 import com.intellectualcrafters.plot.util.PlotHelper;
+import com.intellectualcrafters.plot.util.UUIDHandler;
 import com.sk89q.worldedit.BlockVector;
 import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.bukkit.selections.Selection;
@@ -77,7 +78,7 @@ public class WorldEditListener implements Listener {
         if ((plot == null) || (plot.owner == null)) {
             return;
         }
-        final Player player = Bukkit.getPlayer(plot.owner);
+        final Player player = UUIDHandler.uuidWrapper.getPlayer(plot.owner);
         if (player == null) {
             return;
         }

PlotSquared/src/main/java/com/intellectualcrafters/plot/listeners/WorldGuardListener.java

@@ -76,10 +76,10 @@ public class WorldGuardListener implements Listener {
         // requester.setOp(true);
 
         // 10 ticks should be enough
-        final PermissionAttachment add = requester.addAttachment(JavaPlugin.getPlugin(PlotMain.class), 10);
+        final PermissionAttachment add = requester.addAttachment(PlotMain.getMain(), 10);
         add.setPermission("worldguard.region.addowner.own.*", true);
 
-        final PermissionAttachment remove = requester.addAttachment(JavaPlugin.getPlugin(PlotMain.class), 10);
+        final PermissionAttachment remove = requester.addAttachment(PlotMain.getMain(), 10);
         remove.setPermission("worldguard.region.removeowner.own.*", true);
 
         try {

PlotSquared/src/main/java/com/intellectualcrafters/plot/object/Plot.java

@@ -214,7 +214,7 @@ public class Plot implements Cloneable {
      * @return true if the player is added as a helper or is the owner
      */
     public boolean hasRights(final Player player) {
-        return PlotMain.hasPermission(player, "plots.admin") || ((this.helpers != null) && this.helpers.contains(DBFunc.everyone)) || ((this.helpers != null) && this.helpers.contains(UUIDHandler.getUUID(player))) || ((this.owner != null) && this.owner.equals(UUIDHandler.getUUID(player))) || ((this.owner != null) && (this.trusted != null) && (Bukkit.getPlayer(this.owner) != null) && (this.trusted.contains(UUIDHandler.getUUID(player)) || this.trusted.contains(DBFunc.everyone)));
+        return PlotMain.hasPermission(player, "plots.admin") || ((this.helpers != null) && this.helpers.contains(DBFunc.everyone)) || ((this.helpers != null) && this.helpers.contains(UUIDHandler.getUUID(player))) || ((this.owner != null) && this.owner.equals(UUIDHandler.getUUID(player))) || ((this.owner != null) && (this.trusted != null) && (UUIDHandler.uuidWrapper.getPlayer(this.owner) != null) && (this.trusted.contains(UUIDHandler.getUUID(player)) || this.trusted.contains(DBFunc.everyone)));
     }
 
     /**

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/DefaultUUIDWrapper.java

@@ -2,6 +2,7 @@ package com.intellectualcrafters.plot.util;
 
 import java.util.UUID;
 
+import org.bukkit.Bukkit;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 
@@ -17,4 +18,14 @@ public class DefaultUUIDWrapper extends UUIDWrapper {
         return player.getUniqueId();
     }
 
+    @Override
+    public OfflinePlayer getOfflinePlayer(UUID uuid) {
+        return Bukkit.getOfflinePlayer(uuid);
+    }
+
+    @Override
+    public Player getPlayer(UUID uuid) {
+        return Bukkit.getPlayer(uuid);
+    }
+    
 }

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/OfflineUUIDWrapper.java

@@ -2,10 +2,13 @@ package com.intellectualcrafters.plot.util;
 
 import java.util.UUID;
 
+import org.bukkit.Bukkit;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 
 import com.google.common.base.Charsets;
+import com.google.common.collect.BiMap;
+import com.intellectualcrafters.plot.object.StringWrapper;
 
 public class OfflineUUIDWrapper extends UUIDWrapper {
 
@@ -19,4 +22,33 @@ public class OfflineUUIDWrapper extends UUIDWrapper {
         return UUID.nameUUIDFromBytes(("OfflinePlayer:" + player.getName()).getBytes(Charsets.UTF_8));
     }
 
+    @Override
+    public OfflinePlayer getOfflinePlayer(UUID uuid) {
+        BiMap<UUID, StringWrapper> map = UUIDHandler.getUuidMap().inverse();
+        String name = map.get(uuid).value;
+        if (name != null) {
+            return Bukkit.getOfflinePlayer(name);
+        }
+        else {
+            for (OfflinePlayer player : Bukkit.getOfflinePlayers()) {
+                if (getUUID(player).equals(uuid)) {
+                    return player;
+                }
+            }
+        }
+        return Bukkit.getOfflinePlayer(uuid.toString());
+    }
+
+    @Override
+    public Player getPlayer(UUID uuid) {
+        for (Player player : Bukkit.getOnlinePlayers()) {
+            if (getUUID(player).equals(uuid)) {
+                return player;
+            }
+        }
+        return null;
+    }
+    
+    
+    
 }

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/PlayerFunctions.java

@@ -55,7 +55,7 @@ public class PlayerFunctions {
      * @return
      */
     public static boolean hasExpired(final Plot plot) {
-        final OfflinePlayer player = Bukkit.getOfflinePlayer(plot.owner);
+        final OfflinePlayer player = UUIDHandler.uuidWrapper.getOfflinePlayer(plot.owner);
         final long lp = player.getLastPlayed();
         final long cu = System.currentTimeMillis();
         return (lp - cu) > 30l;

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/PlotHelper.java

@@ -273,7 +273,7 @@ public class PlotHelper {
         if (uuid == null) {
             return "unknown";
         }
-        final OfflinePlayer plr = Bukkit.getOfflinePlayer(uuid);
+        final OfflinePlayer plr = UUIDHandler.uuidWrapper.getOfflinePlayer(uuid);
         if (plr == null) {
             return "unknown";
         }

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/SchematicHandler.java

@@ -122,14 +122,14 @@ public class SchematicHandler {
      */
     public static Schematic getSchematic(final String name) {
         {
-            final File parent = new File(JavaPlugin.getPlugin(PlotMain.class).getDataFolder() + File.separator + "schematics");
+            final File parent = new File(PlotMain.getMain().getDataFolder() + File.separator + "schematics");
             if (!parent.exists()) {
                 if (!parent.mkdir()) {
                     throw new RuntimeException("Could not create schematic parent directory");
                 }
             }
         }
-        final File file = new File(JavaPlugin.getPlugin(PlotMain.class).getDataFolder() + File.separator + "schematics" + File.separator + name + ".schematic");
+        final File file = new File(PlotMain.getMain().getDataFolder() + File.separator + "schematics" + File.separator + name + ".schematic");
         if (!file.exists()) {
             PlotMain.sendConsoleSenderMessage(file.toString() + " doesn't exist");
             return null;

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/UUIDHandler.java

@@ -194,7 +194,7 @@ public class UUIDHandler {
         if ((name = getNameOfflinePlayer(uuid)) != null) {
             return name;
         }
-        if (online) {
+        if (online && !Settings.OFFLINE_MODE) {
             if (!Settings.CUSTOM_API) {
                 try {
                     final NameFetcher fetcher = new NameFetcher(Arrays.asList(uuid));
@@ -251,7 +251,7 @@ public class UUIDHandler {
      * @return String - name
      */
     private static String getNameOnlinePlayer(final UUID uuid) {
-        final Player player = Bukkit.getPlayer(uuid);
+        final Player player = uuidWrapper.getPlayer(uuid);
         if ((player == null) || !player.isOnline()) {
             return null;
         }
@@ -260,12 +260,14 @@ public class UUIDHandler {
         return name;
     }
     
+    
+
     /**
      * @param uuid to use as key
      * @return String - name
      */
     private static String getNameOfflinePlayer(final UUID uuid) {
-        final OfflinePlayer player = Bukkit.getOfflinePlayer(uuid);
+        final OfflinePlayer player = uuidWrapper.getOfflinePlayer(uuid);
         if ((player == null) || !player.hasPlayedBefore()) {
             return null;
         }

PlotSquared/src/main/java/com/intellectualcrafters/plot/util/UUIDWrapper.java

@@ -9,4 +9,8 @@ public abstract class UUIDWrapper {
     public abstract UUID getUUID(Player player);
 
     public abstract UUID getUUID(OfflinePlayer player);
+    
+    public abstract OfflinePlayer getOfflinePlayer(UUID uuid);
+    
+    public abstract Player getPlayer(UUID uuid);
 }

PlotSquared/src/main/java/com/intellectualcrafters/plot/uuid/PlotUUIDSaver.java

@@ -46,7 +46,7 @@ public class PlotUUIDSaver implements UUIDSaver {
 
     @Override
     public void globalPopulate() {
-        JavaPlugin.getPlugin(PlotMain.class).getServer().getScheduler().runTaskAsynchronously(JavaPlugin.getPlugin(PlotMain.class), new Runnable() {
+        Bukkit.getServer().getScheduler().runTaskAsynchronously(PlotMain.getMain(), new Runnable() {
             @Override
             public void run() {
                 final OfflinePlayer[] offlinePlayers = Bukkit.getOfflinePlayers();