PaperMC/nms-patches/CraftingManager.patch

--- a/net/minecraft/server/CraftingManager.java
+++ b/net/minecraft/server/CraftingManager.java
@@ -26,7 +26,7 @@
     private static final Logger c = LogManager.getLogger();
     public static final int a = "recipes/".length();
     public static final int b = ".json".length();
-    public Map<Recipes<?>, Map<MinecraftKey, IRecipe<?>>> recipes = (Map) SystemUtils.a((Object) Maps.newHashMap(), CraftingManager::a);
+    public Map<Recipes<?>, it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<MinecraftKey, IRecipe<?>>> recipes = SystemUtils.a(Maps.newHashMap(), CraftingManager::a); // CraftBukkit
     private boolean e;
 
     public CraftingManager() {}
@@ -88,19 +88,23 @@
     }
 
     public void addRecipe(IRecipe<?> irecipe) {
-        Map<MinecraftKey, IRecipe<?>> map = (Map) this.recipes.get(irecipe.g());
+        it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<MinecraftKey, IRecipe<?>> map = this.recipes.get(irecipe.g()); // CraftBukkit
 
         if (map.containsKey(irecipe.getKey())) {
             throw new IllegalStateException("Duplicate recipe ignored with ID " + irecipe.getKey());
         } else {
-            map.put(irecipe.getKey(), irecipe);
+            map.putAndMoveToFirst(irecipe.getKey(), irecipe); // CraftBukkit - SPIGOT-4638: last recipe gets priority
         }
     }
 
     public <C extends IInventory, T extends IRecipe<C>> Optional<T> craft(Recipes<T> recipes, C c0, World world) {
-        return this.a(recipes).values().stream().flatMap((irecipe) -> {
+        // CraftBukkit start
+        Optional<T> recipe = this.a(recipes).values().stream().flatMap((irecipe) -> {
             return SystemUtils.a(recipes.a(irecipe, world, c0));
         }).findFirst();
+        c0.setCurrentRecipe(recipe.orElse(null)); // CraftBukkit - Clear recipe when no recipe is found
+        // CraftBukkit end
+        return recipe;
     }
 
     public <C extends IInventory, T extends IRecipe<C>> List<T> b(Recipes<T> recipes, C c0, World world) {
@@ -112,7 +116,7 @@
     }
 
     private <C extends IInventory, T extends IRecipe<C>> Map<MinecraftKey, IRecipe<C>> a(Recipes<T> recipes) {
-        return (Map) this.recipes.getOrDefault(recipes, Maps.newHashMap());
+        return (Map) this.recipes.getOrDefault(recipes, new it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<>()); // CraftBukkit
     }
 
     public <C extends IInventory, T extends IRecipe<C>> NonNullList<ItemStack> c(Recipes<T> recipes, C c0, World world) {
@@ -133,7 +137,7 @@
 
     public Optional<? extends IRecipe<?>> a(MinecraftKey minecraftkey) {
         return this.recipes.values().stream().map((map) -> {
-            return (IRecipe) map.get(minecraftkey);
+            return map.get(minecraftkey); // CraftBukkit - decompile error
         }).filter(Objects::nonNull).findFirst();
     }
 
@@ -157,14 +161,14 @@
         })).a(minecraftkey, jsonobject);
     }
 
-    private static void a(Map<Recipes<?>, Map<MinecraftKey, IRecipe<?>>> map) {
+    private static void a(Map<Recipes<?>, it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<MinecraftKey, IRecipe<?>>> map) { // CraftBukkit
         map.clear();
         Iterator iterator = IRegistry.RECIPE_TYPE.iterator();
 
         while (iterator.hasNext()) {
             Recipes<?> recipes = (Recipes) iterator.next();
 
-            map.put(recipes, Maps.newHashMap());
+            map.put(recipes, new it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap<>()); // CraftBukkit
         }
 
     }