add hashable itemstaskkey

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

@@ -19,19 +19,20 @@
 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) {
+        protected boolean removeEldestEntry(Map.Entry<ItemStackKey, FluidStack> eldest) {
             return size() > 200;
         }
     };
@@ -95,15 +96,16 @@ public static boolean equalItemAndNBT(ItemStack stackA, ItemStack stackB, boolea
     }
 
     public static synchronized FluidStack getFluid(ItemStack stack) {
-        FluidStack fluid = fluidcache.get(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 == null ? NULL_FLUID : fluid);
+            fluidcache.put(key, fluid == null ? NULL_FLUID : fluid);
         }
 
         return fluid == NULL_FLUID ? null : fluid;

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);
+    }
+}