Restore Issue 583

src/main/java/codechicken/nei/NEIClientConfig.java

@@ -723,21 +723,24 @@ public static OptionList getOptionList() {
 
     public static void loadWorld(String worldPath) {
         unloadWorld();
-        NEIClientConfig.worldPath = worldPath;
-
         setInternalEnabled(true);
-        logger.debug("Loading " + (Minecraft.getMinecraft().isSingleplayer() ? "Local" : "Remote") + " World");
 
-        final File specificDir = new File(CommonUtils.getMinecraftDir(), "saves/NEI/" + worldPath);
-        final boolean newWorld = !specificDir.exists();
+        if (!worldPath.equals(NEIClientConfig.worldPath)) {
+            NEIClientConfig.worldPath = worldPath;
 
-        if (newWorld) {
-            specificDir.mkdirs();
-        }
+            logger.debug("Loading " + (Minecraft.getMinecraft().isSingleplayer() ? "Local" : "Remote") + " World");
+
+            final File specificDir = new File(CommonUtils.getMinecraftDir(), "saves/NEI/" + worldPath);
+            final boolean newWorld = !specificDir.exists();
 
-        world = new ConfigSet(new File(specificDir, "NEI.dat"), new ConfigFile(new File(specificDir, "NEI.cfg")));
-        bootNEI(ClientUtils.getWorld());
-        onWorldLoad(newWorld);
+            if (newWorld) {
+                specificDir.mkdirs();
+            }
+
+            world = new ConfigSet(new File(specificDir, "NEI.dat"), new ConfigFile(new File(specificDir, "NEI.cfg")));
+            bootNEI(ClientUtils.getWorld());
+            onWorldLoad(newWorld);
+        }
     }
 
     public static String getWorldPath() {

src/main/java/codechicken/nei/recipe/StackInfo.java

@@ -10,6 +10,7 @@
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
 import net.minecraftforge.fluids.FluidContainerRegistry;
+import net.minecraftforge.fluids.FluidRegistry;
 import net.minecraftforge.fluids.FluidStack;
 import net.minecraftforge.fluids.IFluidContainerItem;
 
@@ -18,19 +19,21 @@
 import codechicken.nei.api.IStackStringifyHandler;
 import codechicken.nei.recipe.stackinfo.DefaultStackStringifyHandler;
 import codechicken.nei.recipe.stackinfo.GTFluidStackStringifyHandler;
+import codechicken.nei.util.ItemStackKey;
 
 public class StackInfo {
 
+    private static final FluidStack NULL_FLUID = new FluidStack(FluidRegistry.WATER, 0);
     public static final ArrayList<IStackStringifyHandler> stackStringifyHandlers = new ArrayList<>();
     private static final HashMap<String, HashMap<String, String[]>> guidfilters = new HashMap<>();
     private static final ItemStackMap<String> guidcache = new ItemStackMap<>();
-    private static final LinkedHashMap<ItemStack, FluidStack> fluidcache = new LinkedHashMap<>() {
+    private static final LinkedHashMap<ItemStackKey, FluidStack> fluidcache = new LinkedHashMap<>() {
 
         private static final long serialVersionUID = 1042213947848622164L;
 
         @Override
-        protected boolean removeEldestEntry(Map.Entry<ItemStack, FluidStack> eldest) {
-            return size() > 20;
+        protected boolean removeEldestEntry(Map.Entry<ItemStackKey, FluidStack> eldest) {
+            return size() > 200;
         }
     };
 
@@ -92,19 +95,20 @@ public static boolean equalItemAndNBT(ItemStack stackA, ItemStack stackB, boolea
         return true;
     }
 
-    public static FluidStack getFluid(ItemStack stack) {
-        FluidStack fluid = fluidcache.get(stack);
+    public static synchronized FluidStack getFluid(ItemStack stack) {
+        ItemStackKey key = new ItemStackKey(stack);
+        FluidStack fluid = fluidcache.get(key);
 
-        if (fluid == null && !fluidcache.containsKey(stack)) {
+        if (fluid == null) {
 
             for (int i = stackStringifyHandlers.size() - 1; i >= 0 && fluid == null; i--) {
                 fluid = stackStringifyHandlers.get(i).getFluid(stack);
             }
 
-            fluidcache.put(stack, fluid);
+            fluidcache.put(key, fluid == null ? NULL_FLUID : fluid);
         }
 
-        return fluid;
+        return fluid == NULL_FLUID ? null : fluid;
     }
 
     public static boolean isFluidContainer(ItemStack stack) {

src/main/java/codechicken/nei/util/ItemStackKey.java

@@ -0,0 +1,33 @@
+package codechicken.nei.util;
+
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+
+public class ItemStackKey {
+
+    public final ItemStack stack;
+    private int hashCode = 1;
+
+    public ItemStackKey(ItemStack stack) {
+        this.stack = stack;
+
+        if (this.stack != null) {
+            this.hashCode = 31 * this.hashCode + stack.stackSize;
+            this.hashCode = 31 * this.hashCode + Item.getIdFromItem(stack.getItem());
+            this.hashCode = 31 * this.hashCode + stack.getItemDamage();
+            this.hashCode = 31 * this.hashCode + (!stack.hasTagCompound() ? 0 : stack.getTagCompound().hashCode());
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return this.hashCode;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == this) return true;
+        if (!(o instanceof ItemStackKey)) return false;
+        return ItemStack.areItemStacksEqual(this.stack, ((ItemStackKey) o).stack);
+    }
+}