SPIGOT-4223: Fix inventories using the same TileEntity instance.

src/main/java/org/bukkit/craftbukkit/inventory/util/CraftInventoryCreator.java

@@ -2,9 +2,6 @@ package org.bukkit.craftbukkit.inventory.util;
 
 import java.util.HashMap;
 import java.util.Map;
-import net.minecraft.server.TileEntityDispenser;
-import net.minecraft.server.TileEntityDropper;
-import net.minecraft.server.TileEntityHopper;
 import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.InventoryHolder;
@@ -18,9 +15,8 @@ public final class CraftInventoryCreator {
 
     private CraftInventoryCreator() {
         converterMap.put(InventoryType.CHEST, DEFAULT_CONVERTER);
-        converterMap.put(InventoryType.DISPENSER, new CraftTileInventoryConverter(new TileEntityDispenser()));
+        converterMap.put(InventoryType.DISPENSER, new CraftTileInventoryConverter.Dispenser());
-        converterMap.put(InventoryType.DROPPER, new CraftTileInventoryConverter(new TileEntityDropper()));
+        converterMap.put(InventoryType.DROPPER, new CraftTileInventoryConverter.Dropper());
-        // furnace needs a world
         converterMap.put(InventoryType.FURNACE, new CraftTileInventoryConverter.Furnace());
         converterMap.put(InventoryType.WORKBENCH, DEFAULT_CONVERTER);
         converterMap.put(InventoryType.ENCHANTING, DEFAULT_CONVERTER);
@@ -30,7 +26,7 @@ public final class CraftInventoryCreator {
         converterMap.put(InventoryType.ENDER_CHEST, DEFAULT_CONVERTER);
         converterMap.put(InventoryType.ANVIL, DEFAULT_CONVERTER);
         converterMap.put(InventoryType.BEACON, new CraftTileInventoryConverter.Beacon());
-        converterMap.put(InventoryType.HOPPER, new CraftTileInventoryConverter(new TileEntityHopper()));
+        converterMap.put(InventoryType.HOPPER, new CraftTileInventoryConverter.Hopper());
         converterMap.put(InventoryType.SHULKER_BOX, DEFAULT_CONVERTER);
     }
 

src/main/java/org/bukkit/craftbukkit/inventory/util/CraftTileInventoryConverter.java

@@ -4,7 +4,10 @@ import net.minecraft.server.ITileInventory;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.TileEntityBeacon;
 import net.minecraft.server.TileEntityBrewingStand;
+import net.minecraft.server.TileEntityDispenser;
+import net.minecraft.server.TileEntityDropper;
 import net.minecraft.server.TileEntityFurnace;
+import net.minecraft.server.TileEntityHopper;
 import net.minecraft.server.TileEntityLootable;
 import org.bukkit.craftbukkit.inventory.CraftInventory;
 import org.bukkit.craftbukkit.inventory.CraftInventoryBeacon;
@@ -15,26 +18,23 @@ import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.InventoryHolder;
 
-public class CraftTileInventoryConverter implements CraftInventoryCreator.InventoryConverter {
+public abstract class CraftTileInventoryConverter implements CraftInventoryCreator.InventoryConverter {
 
-    protected final ITileInventory tileEntity;
+    public abstract ITileInventory getTileEntity();
-
-    public CraftTileInventoryConverter(ITileInventory tileEntity) {
-        this.tileEntity = tileEntity;
-    }
 
     @Override
     public Inventory createInventory(InventoryHolder holder, InventoryType type) {
-        return getInventory(tileEntity);
+        return getInventory(getTileEntity());
     }
 
     @Override
     public Inventory createInventory(InventoryHolder holder, InventoryType type, String title) {
-        if (tileEntity instanceof TileEntityLootable) {
+        ITileInventory te = getTileEntity();
-            ((TileEntityLootable) tileEntity).setCustomName(CraftChatMessage.fromStringOrNull(title));
+        if (te instanceof TileEntityLootable) {
+            ((TileEntityLootable) te).setCustomName(CraftChatMessage.fromStringOrNull(title));
         }
 
-        return getInventory(tileEntity);
+        return getInventory(te);
     }
 
     public Inventory getInventory(ITileInventory tileEntity) {
@@ -43,37 +43,37 @@ public class CraftTileInventoryConverter implements CraftInventoryCreator.Invent
 
     public static class Furnace extends CraftTileInventoryConverter {
 
-        public Furnace() {
-            super(new TileEntityFurnace());
-        }
-
         @Override
-        public Inventory createInventory(InventoryHolder owner, InventoryType type) {
+        public ITileInventory getTileEntity() {
-            return getInventory(tileEntity);
+            TileEntityFurnace furnace = new TileEntityFurnace();
+            furnace.setWorld(MinecraftServer.getServer().getWorldServer(0)); // TODO: customize this if required
+            return furnace;
         }
 
         @Override
         public Inventory createInventory(InventoryHolder owner, InventoryType type, String title) {
+            ITileInventory tileEntity = getTileEntity();
             ((TileEntityFurnace) tileEntity).setCustomName(CraftChatMessage.fromStringOrNull(title));
             return getInventory(tileEntity);
         }
 
         @Override
         public Inventory getInventory(ITileInventory tileEntity) {
-            ((TileEntityFurnace) tileEntity).setWorld(MinecraftServer.getServer().getWorldServer(0)); // TODO: customize this if required
             return new CraftInventoryFurnace((TileEntityFurnace) tileEntity);
         }
     }
 
     public static class BrewingStand extends CraftTileInventoryConverter {
 
-        public BrewingStand() {
+        @Override
-            super(new TileEntityBrewingStand());
+        public ITileInventory getTileEntity() {
+            return new TileEntityBrewingStand();
         }
 
         @Override
         public Inventory createInventory(InventoryHolder holder, InventoryType type, String title) {
             // BrewingStand does not extend TileEntityLootable
+            ITileInventory tileEntity = getTileEntity();
             if (tileEntity instanceof TileEntityBrewingStand) {
                 ((TileEntityBrewingStand) tileEntity).setCustomName(CraftChatMessage.fromStringOrNull(title));
             }
@@ -88,8 +88,9 @@ public class CraftTileInventoryConverter implements CraftInventoryCreator.Invent
 
     public static class Beacon extends CraftTileInventoryConverter {
 
-        public Beacon() {
+        @Override
-            super(new TileEntityBeacon());
+        public ITileInventory getTileEntity() {
+            return new TileEntityBeacon();
         }
 
         @Override
@@ -97,4 +98,28 @@ public class CraftTileInventoryConverter implements CraftInventoryCreator.Invent
             return new CraftInventoryBeacon((TileEntityBeacon) tileInventory);
         }
     }
+
+    public static class Dispenser extends CraftTileInventoryConverter {
+
+        @Override
+        public ITileInventory getTileEntity() {
+            return new TileEntityDispenser();
+        }
+    }
+
+    public static class Dropper extends CraftTileInventoryConverter {
+
+        @Override
+        public ITileInventory getTileEntity() {
+            return new TileEntityDropper();
+        }
+    }
+
+    public static class Hopper extends CraftTileInventoryConverter {
+
+        @Override
+        public ITileInventory getTileEntity() {
+            return new TileEntityHopper();
+        }
+    }
 }