From b8a0049207314587f84f2d5da11f74022e2b6cc3 Mon Sep 17 00:00:00 2001 From: Jake Potrebic Date: Wed, 23 Aug 2023 08:20:32 -0700 Subject: [PATCH] Fix exact choice recipe book clicks (#7822) --- ...om-Shapeless-Custom-Crafting-Recipes.patch | 68 ---- ...rove-exact-choice-recipe-ingredients.patch | 383 ++++++++++++++++++ .../io/papermc/testplugin/TestPlugin.java | 73 ++++ 3 files changed, 456 insertions(+), 68 deletions(-) delete mode 100644 patches/server/0295-Fix-Custom-Shapeless-Custom-Crafting-Recipes.patch create mode 100644 patches/server/0295-Improve-exact-choice-recipe-ingredients.patch diff --git a/patches/server/0295-Fix-Custom-Shapeless-Custom-Crafting-Recipes.patch b/patches/server/0295-Fix-Custom-Shapeless-Custom-Crafting-Recipes.patch deleted file mode 100644 index 4acb5d194b..0000000000 --- a/patches/server/0295-Fix-Custom-Shapeless-Custom-Crafting-Recipes.patch +++ /dev/null @@ -1,68 +0,0 @@ -From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 -From: Aikar -Date: Fri, 18 Jan 2019 00:08:15 -0500 -Subject: [PATCH] Fix Custom Shapeless Custom Crafting Recipes - -Mojang implemented Shapeless different than Shaped - -This made the Bukkit RecipeChoice API not work for Shapeless. - -This reimplements vanilla logic using the same test logic as Shaped - -diff --git a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java -index 1023dcb80dfb978dd496ed0f96ca5832fadf0f87..7f174bb89bf4d700a5ae1b65d8abd4f5b1e7b5ed 100644 ---- a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java -+++ b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java -@@ -85,16 +85,49 @@ public class ShapelessRecipe implements CraftingRecipe { - StackedContents autorecipestackmanager = new StackedContents(); - int i = 0; - -+ // Paper start -+ java.util.List providedItems = new java.util.ArrayList<>(); -+ co.aikar.util.Counter matchedProvided = new co.aikar.util.Counter<>(); -+ co.aikar.util.Counter matchedIngredients = new co.aikar.util.Counter<>(); -+ // Paper end - for (int j = 0; j < inventory.getContainerSize(); ++j) { - ItemStack itemstack = inventory.getItem(j); - - if (!itemstack.isEmpty()) { -- ++i; -- autorecipestackmanager.accountStack(itemstack, 1); -+ // Paper start -+ itemstack = itemstack.copy(); -+ providedItems.add(itemstack); -+ for (Ingredient ingredient : ingredients) { -+ if (ingredient.test(itemstack)) { -+ matchedProvided.increment(itemstack); -+ matchedIngredients.increment(ingredient); -+ } -+ } -+ // Paper end - } - } - -- return i == this.ingredients.size() && autorecipestackmanager.canCraft(this, (IntList) null); -+ // Paper start -+ if (matchedProvided.isEmpty() || matchedIngredients.isEmpty()) { -+ return false; -+ } -+ java.util.List ingredients = new java.util.ArrayList<>(this.ingredients); -+ providedItems.sort(java.util.Comparator.comparingInt((ItemStack c) -> (int) matchedProvided.getCount(c)).reversed()); -+ ingredients.sort(java.util.Comparator.comparingInt((Ingredient c) -> (int) matchedIngredients.getCount(c))); -+ -+ PROVIDED: -+ for (ItemStack provided : providedItems) { -+ for (Iterator itIngredient = ingredients.iterator(); itIngredient.hasNext(); ) { -+ Ingredient ingredient = itIngredient.next(); -+ if (ingredient.test(provided)) { -+ itIngredient.remove(); -+ continue PROVIDED; -+ } -+ } -+ return false; -+ } -+ return ingredients.isEmpty(); -+ // Paper end - } - - public ItemStack assemble(CraftingContainer inventory, RegistryAccess registryManager) { diff --git a/patches/server/0295-Improve-exact-choice-recipe-ingredients.patch b/patches/server/0295-Improve-exact-choice-recipe-ingredients.patch new file mode 100644 index 0000000000..60306eac24 --- /dev/null +++ b/patches/server/0295-Improve-exact-choice-recipe-ingredients.patch @@ -0,0 +1,383 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Jake Potrebic +Date: Sun, 25 Jun 2023 23:10:14 -0700 +Subject: [PATCH] Improve exact choice recipe ingredients + +Fixes exact choices not working with recipe book clicks +and shapeless recipes. + +== AT == +public net.minecraft.world.item.ItemStackLinkedSet TYPE_AND_TAG +public net.minecraft.world.entity.player.StackedContents put(II)V + +diff --git a/src/main/java/io/papermc/paper/inventory/recipe/RecipeBookExactChoiceRecipe.java b/src/main/java/io/papermc/paper/inventory/recipe/RecipeBookExactChoiceRecipe.java +new file mode 100644 +index 0000000000000000000000000000000000000000..2a2f8327a5bd3983a3a13fd663beb98906f27312 +--- /dev/null ++++ b/src/main/java/io/papermc/paper/inventory/recipe/RecipeBookExactChoiceRecipe.java +@@ -0,0 +1,30 @@ ++package io.papermc.paper.inventory.recipe; ++ ++import net.minecraft.world.Container; ++import net.minecraft.world.item.crafting.Ingredient; ++import net.minecraft.world.item.crafting.Recipe; ++ ++public abstract class RecipeBookExactChoiceRecipe implements Recipe { ++ ++ private boolean hasExactIngredients; ++ ++ protected final void checkExactIngredients() { ++ // skip any special recipes ++ if (this.isSpecial()) { ++ this.hasExactIngredients = false; ++ return; ++ } ++ for (final Ingredient ingredient : this.getIngredients()) { ++ if (!ingredient.isEmpty() && ingredient.exact) { ++ this.hasExactIngredients = true; ++ return; ++ } ++ } ++ this.hasExactIngredients = false; ++ } ++ ++ @Override ++ public final boolean hasExactIngredients() { ++ return this.hasExactIngredients; ++ } ++} +diff --git a/src/main/java/io/papermc/paper/inventory/recipe/StackedContentsExtraMap.java b/src/main/java/io/papermc/paper/inventory/recipe/StackedContentsExtraMap.java +new file mode 100644 +index 0000000000000000000000000000000000000000..63db0b843c5bd11f979e613ba6cfac9d9da956bb +--- /dev/null ++++ b/src/main/java/io/papermc/paper/inventory/recipe/StackedContentsExtraMap.java +@@ -0,0 +1,79 @@ ++package io.papermc.paper.inventory.recipe; ++ ++import it.unimi.dsi.fastutil.ints.Int2ObjectMap; ++import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap; ++import it.unimi.dsi.fastutil.ints.IntArrayList; ++import it.unimi.dsi.fastutil.ints.IntComparators; ++import it.unimi.dsi.fastutil.ints.IntList; ++import it.unimi.dsi.fastutil.objects.Object2IntMap; ++import it.unimi.dsi.fastutil.objects.Object2IntOpenCustomHashMap; ++import java.util.IdentityHashMap; ++import java.util.Map; ++import java.util.concurrent.atomic.AtomicInteger; ++import net.minecraft.core.registries.BuiltInRegistries; ++import net.minecraft.world.entity.player.StackedContents; ++import net.minecraft.world.item.ItemStack; ++import net.minecraft.world.item.ItemStackLinkedSet; ++import net.minecraft.world.item.crafting.Ingredient; ++import net.minecraft.world.item.crafting.Recipe; ++ ++public final class StackedContentsExtraMap { ++ ++ private final AtomicInteger idCounter = new AtomicInteger(BuiltInRegistries.ITEM.size()); // start at max vanilla stacked contents idx ++ private final Object2IntMap exactChoiceIds = new Object2IntOpenCustomHashMap<>(ItemStackLinkedSet.TYPE_AND_TAG); ++ private final Int2ObjectMap idToExactChoice = new Int2ObjectOpenHashMap<>(); ++ private final StackedContents contents; ++ public final Map extraStackingIds = new IdentityHashMap<>(); ++ ++ public StackedContentsExtraMap(final StackedContents contents, final Recipe recipe) { ++ this.exactChoiceIds.defaultReturnValue(-1); ++ this.contents = contents; ++ this.initialize(recipe); ++ } ++ ++ private void initialize(final Recipe recipe) { ++ if (recipe.hasExactIngredients()) { ++ for (final Ingredient ingredient : recipe.getIngredients()) { ++ if (!ingredient.isEmpty() && ingredient.exact) { ++ final net.minecraft.world.item.ItemStack[] items = ingredient.getItems(); ++ final IntList idList = new IntArrayList(items.length); ++ for (final ItemStack item : items) { ++ idList.add(this.registerExact(item)); // I think not copying the stack here is safe because cb copies the stack when creating the ingredient ++ if (!item.hasTag()) { ++ // add regular index if it's a plain itemstack but still registered as exact ++ idList.add(StackedContents.getStackingIndex(item)); ++ } ++ } ++ idList.sort(IntComparators.NATURAL_COMPARATOR); ++ this.extraStackingIds.put(ingredient, idList); ++ } ++ } ++ } ++ } ++ ++ private int registerExact(final ItemStack exactChoice) { ++ final int existing = this.exactChoiceIds.getInt(exactChoice); ++ if (existing > -1) { ++ return existing; ++ } ++ final int id = this.idCounter.getAndIncrement(); ++ this.exactChoiceIds.put(exactChoice, id); ++ this.idToExactChoice.put(id, exactChoice); ++ return id; ++ } ++ ++ public ItemStack getById(int id) { ++ return this.idToExactChoice.get(id); ++ } ++ ++ public boolean accountStack(final ItemStack stack, final int count) { ++ if (!this.exactChoiceIds.isEmpty()) { ++ final int id = this.exactChoiceIds.getInt(stack); ++ if (id >= 0) { ++ this.contents.put(id, count); ++ return true; ++ } ++ } ++ return false; ++ } ++} +diff --git a/src/main/java/io/papermc/paper/inventory/recipe/package-info.java b/src/main/java/io/papermc/paper/inventory/recipe/package-info.java +new file mode 100644 +index 0000000000000000000000000000000000000000..413dfa52760db393ad6a8b5341200ee704a864fc +--- /dev/null ++++ b/src/main/java/io/papermc/paper/inventory/recipe/package-info.java +@@ -0,0 +1,5 @@ ++@DefaultQualifier(NonNull.class) ++package io.papermc.paper.inventory.recipe; ++ ++import org.checkerframework.checker.nullness.qual.NonNull; ++import org.checkerframework.framework.qual.DefaultQualifier; +diff --git a/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java b/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java +index c8e9e85728d6b60bb829e69c015ab3c5172afd54..86cc516a6d4e8c64497479ec128d4e8d73667cfa 100644 +--- a/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java ++++ b/src/main/java/net/minecraft/recipebook/ServerPlaceRecipe.java +@@ -33,6 +33,7 @@ public class ServerPlaceRecipe implements PlaceRecipe implements PlaceRecipe implements PlaceRecipe inputs, int slot, int amount, int gridX, int gridY) { + Slot slot2 = this.menu.getSlot(slot); +- ItemStack itemStack = StackedContents.fromStackingIndex(inputs.next()); ++ // Paper start ++ final int itemId = inputs.next(); ++ ItemStack itemStack = null; ++ boolean isExact = false; ++ if (this.stackedContents.extrasMap != null && itemId >= net.minecraft.core.registries.BuiltInRegistries.ITEM.size()) { ++ itemStack = StackedContents.fromStackingIndexExtras(itemId, this.stackedContents.extrasMap).copy(); ++ isExact = true; ++ } ++ if (itemStack == null) { ++ itemStack = StackedContents.fromStackingIndex(itemId); ++ } ++ // Paper end + if (!itemStack.isEmpty()) { + for(int i = 0; i < amount; ++i) { +- this.moveItemToGrid(slot2, itemStack); ++ this.moveItemToGrid(slot2, itemStack, isExact); // Paper + } + } + +@@ -129,8 +141,14 @@ public class ServerPlaceRecipe implements PlaceRecipe recipe) { ++ this.extrasMap = new io.papermc.paper.inventory.recipe.StackedContentsExtraMap(this, recipe); ++ } ++ ++ public static int maxStackSizeFromStackingIndex(final int itemId, @Nullable final StackedContents contents) { ++ if (contents != null && contents.extrasMap != null && itemId >= BuiltInRegistries.ITEM.size()) { ++ return fromStackingIndexExtras(itemId, contents.extrasMap).getMaxStackSize(); ++ } ++ return fromStackingIndex(itemId).getMaxStackSize(); ++ } ++ ++ public static ItemStack fromStackingIndexExtras(final int itemId, final io.papermc.paper.inventory.recipe.StackedContentsExtraMap extrasMap) { ++ return extrasMap.getById(itemId).copy(); ++ } ++ // Paper end ++ + public void clear() { + this.contents.clear(); + } +@@ -106,7 +126,7 @@ public class StackedContents { + this.data = new BitSet(this.ingredientCount + this.itemCount + this.ingredientCount + this.ingredientCount * this.itemCount); + + for(int i = 0; i < this.ingredients.size(); ++i) { +- IntList intList = this.ingredients.get(i).getStackingIds(); ++ IntList intList = this.getStackingIds(this.ingredients.get(i)); // Paper + + for(int j = 0; j < this.itemCount; ++j) { + if (intList.contains(this.items[j])) { +@@ -171,7 +191,7 @@ public class StackedContents { + IntCollection intCollection = new IntAVLTreeSet(); + + for(Ingredient ingredient : this.ingredients) { +- intCollection.addAll(ingredient.getStackingIds()); ++ intCollection.addAll(this.getStackingIds(ingredient)); // Paper + } + + IntIterator intIterator = intCollection.iterator(); +@@ -294,7 +314,7 @@ public class StackedContents { + for(Ingredient ingredient : this.ingredients) { + int j = 0; + +- for(int k : ingredient.getStackingIds()) { ++ for(int k : this.getStackingIds(ingredient)) { // Paper + j = Math.max(j, StackedContents.this.contents.get(k)); + } + +@@ -305,5 +325,17 @@ public class StackedContents { + + return i; + } ++ ++ // Paper start - improve exact recipe choices ++ private IntList getStackingIds(final Ingredient ingredient) { ++ if (StackedContents.this.extrasMap != null) { ++ final IntList ids = StackedContents.this.extrasMap.extraStackingIds.get(ingredient); ++ if (ids != null) { ++ return ids; ++ } ++ } ++ return ingredient.getStackingIds(); ++ } ++ // Paper end - improve exact recipe choices + } + } +diff --git a/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java b/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java +index f551651ce2d8b29c4a5cd787f48dedbbb411b2cb..e30af1e639db0c89066e76915884e1a0bef584a3 100644 +--- a/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java ++++ b/src/main/java/net/minecraft/world/item/crafting/AbstractCookingRecipe.java +@@ -7,7 +7,7 @@ import net.minecraft.world.Container; + import net.minecraft.world.item.ItemStack; + import net.minecraft.world.level.Level; + +-public abstract class AbstractCookingRecipe implements Recipe { ++public abstract class AbstractCookingRecipe extends io.papermc.paper.inventory.recipe.RecipeBookExactChoiceRecipe implements Recipe { // Paper - improve exact recipe choices + protected final RecipeType type; + protected final ResourceLocation id; + private final CookingBookCategory category; +@@ -26,6 +26,7 @@ public abstract class AbstractCookingRecipe implements Recipe { + this.result = output; + this.experience = experience; + this.cookingTime = cookTime; ++ this.checkExactIngredients(); // Paper - improve exact recipe choices + } + + @Override +diff --git a/src/main/java/net/minecraft/world/item/crafting/Recipe.java b/src/main/java/net/minecraft/world/item/crafting/Recipe.java +index d1505698ce45bbc7f592a23111391542d01d2b28..f2cf1f30191e14c9e9b5b5e4a3f6d9346125e998 100644 +--- a/src/main/java/net/minecraft/world/item/crafting/Recipe.java ++++ b/src/main/java/net/minecraft/world/item/crafting/Recipe.java +@@ -68,4 +68,10 @@ public interface Recipe { + } + + org.bukkit.inventory.Recipe toBukkitRecipe(); // CraftBukkit ++ ++ // Paper start - improved exact choice recipes ++ default boolean hasExactIngredients() { ++ return false; ++ } ++ // Paper end + } +diff --git a/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java b/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java +index 9c1285e31d947f92e0b00149e342e793898e0d7c..6693dd51440da3f0fc338c4e2cb67d3222eed182 100644 +--- a/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java ++++ b/src/main/java/net/minecraft/world/item/crafting/ShapedRecipe.java +@@ -30,7 +30,7 @@ import org.bukkit.craftbukkit.inventory.CraftShapedRecipe; + import org.bukkit.inventory.RecipeChoice; + // CraftBukkit end + +-public class ShapedRecipe implements CraftingRecipe { ++public class ShapedRecipe extends io.papermc.paper.inventory.recipe.RecipeBookExactChoiceRecipe implements CraftingRecipe { // Paper - improve exact recipe choices + + final int width; + final int height; +@@ -50,6 +50,7 @@ public class ShapedRecipe implements CraftingRecipe { + this.recipeItems = input; + this.result = output; + this.showNotification = showNotification; ++ this.checkExactIngredients(); // Paper - improve exact recipe choices + } + + public ShapedRecipe(ResourceLocation id, String group, CraftingBookCategory category, int width, int height, NonNullList input, ItemStack output) { +diff --git a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java +index 1023dcb80dfb978dd496ed0f96ca5832fadf0f87..2e60bdc44c33d434bfd9ca5bf8f75de799c6768c 100644 +--- a/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java ++++ b/src/main/java/net/minecraft/world/item/crafting/ShapelessRecipe.java +@@ -20,7 +20,7 @@ import org.bukkit.craftbukkit.inventory.CraftRecipe; + import org.bukkit.craftbukkit.inventory.CraftShapelessRecipe; + // CraftBukkit end + +-public class ShapelessRecipe implements CraftingRecipe { ++public class ShapelessRecipe extends io.papermc.paper.inventory.recipe.RecipeBookExactChoiceRecipe implements CraftingRecipe { // Paper - improve exact recipe choices + + private final ResourceLocation id; + final String group; +@@ -34,6 +34,7 @@ public class ShapelessRecipe implements CraftingRecipe { + this.category = category; + this.result = output; + this.ingredients = input; ++ this.checkExactIngredients(); // Paper - improve exact recipe choices + } + + // CraftBukkit start +@@ -83,6 +84,7 @@ public class ShapelessRecipe implements CraftingRecipe { + + public boolean matches(CraftingContainer inventory, Level world) { + StackedContents autorecipestackmanager = new StackedContents(); ++ autorecipestackmanager.initialize(this); // Paper - better exact choice recipes + int i = 0; + + for (int j = 0; j < inventory.getContainerSize(); ++j) { diff --git a/test-plugin/src/main/java/io/papermc/testplugin/TestPlugin.java b/test-plugin/src/main/java/io/papermc/testplugin/TestPlugin.java index 4e68423bb7..2f0ded36f2 100644 --- a/test-plugin/src/main/java/io/papermc/testplugin/TestPlugin.java +++ b/test-plugin/src/main/java/io/papermc/testplugin/TestPlugin.java @@ -1,12 +1,85 @@ package io.papermc.testplugin; +import io.papermc.paper.event.player.ChatEvent; +import java.util.List; +import org.bukkit.Material; +import org.bukkit.NamespacedKey; +import org.bukkit.event.EventHandler; import org.bukkit.event.Listener; +import org.bukkit.event.player.PlayerJoinEvent; +import org.bukkit.inventory.CookingRecipe; +import org.bukkit.inventory.FurnaceRecipe; +import org.bukkit.inventory.ItemStack; +import org.bukkit.inventory.RecipeChoice; +import org.bukkit.inventory.ShapedRecipe; +import org.bukkit.inventory.ShapelessRecipe; +import org.bukkit.persistence.PersistentDataType; import org.bukkit.plugin.java.JavaPlugin; +import static net.kyori.adventure.text.Component.text; +import static net.kyori.adventure.text.format.NamedTextColor.GOLD; +import static net.kyori.adventure.text.format.Style.style; +import static net.kyori.adventure.text.format.TextDecoration.ITALIC; + public final class TestPlugin extends JavaPlugin implements Listener { + static final NamespacedKey FURNACE_RECIPE_KEY = new NamespacedKey("test", "recipe"); + static final NamespacedKey SHAPED_RECIPE_KEY = new NamespacedKey("test", "shaped_recipe"); + static final NamespacedKey SHAPELESS_RECIPE_KEY = new NamespacedKey("test", "shapless_recipe"); + + static final NamespacedKey PDC_KEY = new NamespacedKey("test", "pdc_key"); + + static final ItemStack SOME_INGREDIENT = new ItemStack(Material.EMERALD); + static { + SOME_INGREDIENT.editMeta(meta -> { + meta.getPersistentDataContainer().set(PDC_KEY, PersistentDataType.BOOLEAN, true); + meta.lore(List.of(text("SPECIAL EMERALD", style(ITALIC.withState(false), GOLD)))); + }); + } + @Override public void onEnable() { this.getServer().getPluginManager().registerEvents(this, this); + + final ItemStack furnaceInput = new ItemStack(Material.STICK); + furnaceInput.editMeta(meta -> { + meta.displayName(text("HELLO")); + }); + final CookingRecipe recipe = new FurnaceRecipe(FURNACE_RECIPE_KEY, new ItemStack(Material.DIAMOND), new RecipeChoice.ExactChoice(furnaceInput), 0, 20); + this.getServer().addRecipe(recipe); + + final ShapedRecipe shapedRecipe = new ShapedRecipe(SHAPED_RECIPE_KEY, new ItemStack(Material.NETHER_BRICK)); + shapedRecipe.shape( + "#$%", + " @ ", + " $ " + ); + shapedRecipe.setIngredient('$', new RecipeChoice.ExactChoice(SOME_INGREDIENT)); + shapedRecipe.setIngredient('#', new RecipeChoice.MaterialChoice(Material.OAK_PLANKS)); + shapedRecipe.setIngredient('%', new RecipeChoice.ExactChoice(new ItemStack(SOME_INGREDIENT.getType()))); + shapedRecipe.setIngredient('@', new RecipeChoice.MaterialChoice(SOME_INGREDIENT.getType())); + this.getServer().addRecipe(shapedRecipe); + + final ShapelessRecipe shapelessRecipe = new ShapelessRecipe(SHAPELESS_RECIPE_KEY, new ItemStack(Material.DEEPSLATE)); + for (int i = 0; i < 4; i++) { + shapelessRecipe.addIngredient(new RecipeChoice.ExactChoice(SOME_INGREDIENT)); + } + shapelessRecipe.addIngredient(new RecipeChoice.MaterialChoice(Material.ICE)); + shapelessRecipe.addIngredient(new RecipeChoice.MaterialChoice(SOME_INGREDIENT.getType())); + this.getServer().addRecipe(shapelessRecipe); + } + + @EventHandler + public void onEvent(PlayerJoinEvent event) { + event.getPlayer().discoverRecipe(FURNACE_RECIPE_KEY); + event.getPlayer().discoverRecipe(SHAPED_RECIPE_KEY); + event.getPlayer().discoverRecipe(SHAPELESS_RECIPE_KEY); + } + + @EventHandler + public void onEvent(ChatEvent event) { + final ItemStack clone = SOME_INGREDIENT.clone(); + clone.setAmount(64); + event.getPlayer().getInventory().addItem(clone); } }