Don't find username on the main thread. Not friendly with partial names.

src/com/lishid/openinv/commands/OpenEnderPluginCommand.java

@@ -17,12 +17,16 @@
 package com.lishid.openinv.commands;
 
 import java.util.HashMap;
+import java.util.UUID;
 
+import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.bukkit.scheduler.BukkitRunnable;
 
 import com.lishid.openinv.OpenInv;
 import com.lishid.openinv.Permissions;
@@ -53,8 +57,7 @@ public class OpenEnderPluginCommand implements CommandExecutor {
             return true;
         }
 
-        Player player = (Player) sender;
-        boolean offline = false;
+        final Player player = (Player) sender;
 
         // History management
         String history = openEnderHistory.get(player);
@@ -64,55 +67,74 @@ public class OpenEnderPluginCommand implements CommandExecutor {
             openEnderHistory.put(player, history);
         }
 
-        // Target selecting
-        Player target;
-
-        String name = "";
+        final String name;
 
         // Read from history if target is not named
         if (args.length < 1) {
-            if (history != null && history != "") {
-                name = history;
-            }
-            else {
-                sender.sendMessage(ChatColor.RED + "OpenEnder history is empty!");
-                return true;
-            }
+            name = history;
         }
         else {
             name = args[0];
         }
 
-        target = this.plugin.getServer().getPlayer(name);
+        sender.sendMessage(ChatColor.GREEN + "Starting inventory lookup.");
+        final UUID senderID = player.getUniqueId();
+        new BukkitRunnable() {
+            @Override
+            public void run() {
+                final OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(name);
+                if (Bukkit.getPlayer(senderID) == null) {
+                    return;
+                }
+                if (offlinePlayer == null || !offlinePlayer.hasPlayedBefore()) {
+                    player.sendMessage(ChatColor.RED + "Player not found!");
+                    return;
+                }
+                new BukkitRunnable() {
+                    @Override
+                    public void run() {
+                        if (Bukkit.getPlayer(senderID) == null) {
+                            return;
+                        }
+                        openInventory(player, offlinePlayer.getUniqueId());
+                    }
+                }.runTask(plugin);
+            }
+        }.runTaskAsynchronously(plugin);
+
+        return true;
+    }
+
+    private void openInventory(Player player, UUID uuid) {
+
+        Player target = this.plugin.getServer().getPlayer(uuid);
 
         if (target == null) {
             // Try loading the player's data
-            target = OpenInv.playerLoader.loadPlayer(name);
+            target = OpenInv.playerLoader.loadPlayer(uuid);
 
             if (target == null) {
-                sender.sendMessage(ChatColor.RED + "Player " + name + " not found!");
-                return true;
+                player.sendMessage(ChatColor.RED + "Player not found!");
+                return;
             }
         }
 
-        if (target != sender && !OpenInv.hasPermission(sender, Permissions.PERM_ENDERCHEST_ALL)) {
-            sender.sendMessage(ChatColor.RED + "You do not have permission to access other player's enderchest");
-            return true;
+
+        if (target != player && !OpenInv.hasPermission(player, Permissions.PERM_ENDERCHEST_ALL)) {
+            player.sendMessage(ChatColor.RED + "You do not have permission to access other player's enderchest");
+            return;
         }
 
         // Record the target
-        history = target.getName();
-        openEnderHistory.put(player, history);
+        openEnderHistory.put(player, target.getName());
 
         // Create the inventory
         ISpecialEnderChest chest = OpenInv.enderChests.get(target.getName().toLowerCase());
         if (chest == null) {
-            chest = InternalAccessor.Instance.newSpecialEnderChest(target, !offline);
+            chest = InternalAccessor.Instance.newSpecialEnderChest(target, !target.isOnline());
         }
 
         // Open the inventory
         player.openInventory(chest.getBukkitInventory());
-
-        return true;
     }
 }

src/com/lishid/openinv/commands/OpenInvPluginCommand.java

@@ -17,12 +17,16 @@
 package com.lishid.openinv.commands;
 
 import java.util.HashMap;
+import java.util.UUID;
 
+import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
+import org.bukkit.scheduler.BukkitRunnable;
 
 import com.lishid.openinv.OpenInv;
 import com.lishid.openinv.Permissions;
@@ -52,8 +56,7 @@ public class OpenInvPluginCommand implements CommandExecutor {
             return true;
         }
 
-        Player player = (Player) sender;
-        boolean offline = false;
+        final Player player = (Player) sender;
 
         // History management
         String history = openInvHistory.get(player);
@@ -63,10 +66,7 @@ public class OpenInvPluginCommand implements CommandExecutor {
             openInvHistory.put(player, history);
         }
 
-        // Target selecting
-        Player target;
-
-        String name = "";
+        final String name;
 
         // Read from history if target is not named
         if (args.length < 1) {
@@ -76,51 +76,76 @@ public class OpenInvPluginCommand implements CommandExecutor {
             name = args[0];
         }
 
-        target = this.plugin.getServer().getPlayer(name);
+        sender.sendMessage(ChatColor.GREEN + "Starting inventory lookup.");
+        final UUID senderID = player.getUniqueId();
+        new BukkitRunnable() {
+            @Override
+            public void run() {
+                final OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(name);
+                if (Bukkit.getPlayer(senderID) == null) {
+                    return;
+                }
+                if (offlinePlayer == null || !offlinePlayer.hasPlayedBefore()) {
+                    player.sendMessage(ChatColor.RED + "Player not found!");
+                    return;
+                }
+                new BukkitRunnable() {
+                    @Override
+                    public void run() {
+                        if (Bukkit.getPlayer(senderID) == null) {
+                            return;
+                        }
+                        openInventory(player, offlinePlayer.getUniqueId());
+                    }
+                }.runTask(plugin);
+            }
+        }.runTaskAsynchronously(plugin);
+
+        return true;
+    }
+
+    private void openInventory(Player player, UUID uuid) {
+
+        Player target = this.plugin.getServer().getPlayer(uuid);
 
         if (target == null) {
-            if (target == null) {
-                // Try loading the player's data
-                target = OpenInv.playerLoader.loadPlayer(name);
+            // Try loading the player's data
+            target = OpenInv.playerLoader.loadPlayer(uuid);
 
-                if (target == null) {
-                    sender.sendMessage(ChatColor.RED + "Player " + name + " not found!");
-                    return true;
-                }
+            if (target == null) {
+                player.sendMessage(ChatColor.RED + "Player not found!");
+                return;
             }
         }
 
         // Permissions checks
         if (!OpenInv.hasPermission(player, Permissions.PERM_OVERRIDE) && OpenInv.hasPermission(target, Permissions.PERM_EXEMPT)) {
-            sender.sendMessage(ChatColor.RED + target.getDisplayName() + "'s inventory is protected!");
-            return true;
+            player.sendMessage(ChatColor.RED + target.getDisplayName() + "'s inventory is protected!");
+            return;
         }
 
         // Crosswork check
         if ((!OpenInv.hasPermission(player, Permissions.PERM_CROSSWORLD) && !OpenInv.hasPermission(player, Permissions.PERM_OVERRIDE)) && target.getWorld() != player.getWorld()) {
-            sender.sendMessage(ChatColor.RED + target.getDisplayName() + " is not in your world!");
-            return true;
+            player.sendMessage(ChatColor.RED + target.getDisplayName() + " is not in your world!");
+            return;
         }
 
         // Self-open check
         if (!OpenInv.hasPermission(player, Permissions.PERM_OPENSELF) && target.equals(player)) {
-            sender.sendMessage(ChatColor.RED + "You're not allowed to openinv yourself.");
-            return true;
+            player.sendMessage(ChatColor.RED + "You're not allowed to openinv yourself.");
+            return;
         }
 
         // Record the target
-        history = target.getName();
-        openInvHistory.put(player, history);
+        openInvHistory.put(player, target.getName());
 
         // Create the inventory
         ISpecialPlayerInventory inv = OpenInv.inventories.get(target.getName().toLowerCase());
         if (inv == null) {
-            inv = InternalAccessor.Instance.newSpecialPlayerInventory(target, !offline);
+            inv = InternalAccessor.Instance.newSpecialPlayerInventory(target, !target.isOnline());
         }
 
         // Open the inventory
         player.openInventory(inv.getBukkitInventory());
-
-        return true;
     }
 }

src/com/lishid/openinv/internal/IPlayerDataManager.java

@@ -16,8 +16,11 @@
 
 package com.lishid.openinv.internal;
 
+import java.util.UUID;
+
 import org.bukkit.entity.Player;
 
 public interface IPlayerDataManager {
     public Player loadPlayer(String name);
+    public Player loadPlayer(UUID uuid);
 }

src/com/lishid/openinv/internal/v1_8_R1/PlayerDataManager.java

@@ -101,4 +101,29 @@ public class PlayerDataManager implements IPlayerDataManager {
 
         return found;
     }
+
+    /* (non-Javadoc)
+     * @see com.lishid.openinv.internal.IPlayerDataManager#loadPlayer(java.util.UUID)
+     */
+    @Override
+    public Player loadPlayer(UUID uuid) {
+    	OfflinePlayer player = Bukkit.getOfflinePlayer(uuid);
+        if (player == null || !player.hasPlayedBefore()) {
+            return null;
+        }
+        GameProfile profile = new GameProfile(uuid, player.getName());
+        MinecraftServer server = ((CraftServer) Bukkit.getServer()).getServer();
+        // Create an entity to load the player data
+        EntityPlayer entity = new EntityPlayer(server, server.getWorldServer(0), profile, new PlayerInteractManager(server.getWorldServer(0)));
+
+        // Get the bukkit entity
+        Player target = (entity == null) ? null : entity.getBukkitEntity();
+        if (target != null) {
+            // Load data
+            target.loadData();
+            // Return the entity
+            return target;
+        }
+        return null;
+    }
 }

src/com/lishid/openinv/internal/v1_8_R1/SpecialPlayerInventory.java

@@ -82,7 +82,7 @@ public class SpecialPlayerInventory extends PlayerInventory implements ISpecialP
     public ItemStack[] getContents() {
         ItemStack[] C = new ItemStack[getSize()];
         System.arraycopy(items, 0, C, 0, items.length);
-        System.arraycopy(items, 0, C, items.length, armor.length);
+        System.arraycopy(armor, 0, C, items.length, armor.length);
         return C;
     }
 

src/plugin.yml

@@ -1,6 +1,6 @@
 name: OpenInv
 main: com.lishid.openinv.OpenInv
-version: 2.2.5
+version: 2.2.6
 author: lishid
 description: >
              This plugin allows you to open a player's inventory as a chest and interact with it in real time.