Paper/patches/api/0277-Improve-item-default-attribute-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 8 May 2021 15:02:00 -0700
Subject: [PATCH] Improve item default attribute API


diff --git a/src/main/java/org/bukkit/Material.java b/src/main/java/org/bukkit/Material.java
index d0aaf145cf34e0c02d5c7b842c203d0630b04b53..5c869feaecd95dbdd658e16f5739bb41540f18bd 100644
--- a/src/main/java/org/bukkit/Material.java
+++ b/src/main/java/org/bukkit/Material.java
@@ -4705,6 +4705,23 @@ public enum Material implements Keyed, Translatable, net.kyori.adventure.transla
     }
     // Paper end - item rarity API
 
+    // Paper start - item default attributes API
+    /**
+     * Returns an immutable multimap of attributes for the slot.
+     * {@link #isItem()} must be true for this material.
+     *
+     * @param equipmentSlot the slot to get the attributes for
+     * @throws IllegalArgumentException if {@link #isItem()} is false
+     * @return an immutable multimap of attributes
+     * @deprecated use {@link #getDefaultAttributeModifiers(EquipmentSlot)}
+     */
+    @NotNull
+    @Deprecated(forRemoval = true, since = "1.20.5")
+    public Multimap<Attribute, AttributeModifier> getItemAttributes(@NotNull EquipmentSlot equipmentSlot) {
+        return this.getDefaultAttributeModifiers(equipmentSlot);
+    }
+    // Paper end - item default attributes API
+
     /**
      * Do not use for any reason.
      *
@@ -5412,13 +5429,34 @@ public enum Material implements Keyed, Translatable, net.kyori.adventure.transla
         }
     }
 
+    // Paper start - improve default item attribute API
+    /**
+     * Return an immutable copy of all default {@link Attribute}s and their {@link AttributeModifier}s.
+     * <p>
+     * Default attributes are those that are always preset on some items, unless
+     * they are specifically overridden on that {@link ItemStack}. Examples include
+     * the attack damage on weapons or the armor value on armor.
+     * <p>
+     * Only available when {@link #isItem()} is true.
+     *
+     * @return the immutable {@link Multimap} with the respective default
+     * Attributes and modifiers, or an empty map if no attributes are set.
+     */
+    public @NotNull @org.jetbrains.annotations.Unmodifiable Multimap<Attribute, AttributeModifier> getDefaultAttributeModifiers() {
+        final ItemType type = this.asItemType();
+        Preconditions.checkArgument(type != null, "The Material is not an item!");
+        return type.getDefaultAttributeModifiers();
+    }
+    // Paper end - improve default item attribute API
+
     /**
      * Return an immutable copy of all default {@link Attribute}s and their
      * {@link AttributeModifier}s for a given {@link EquipmentSlot}.
-     *
-     * Default attributes are those that are always preset on some items, such
-     * as the attack damage on weapons or the armor value on armor.
-     *
+     * <p>
+     * Default attributes are those that are always preset on some items, unless
+     * they are specifically overridden on that {@link ItemStack}. Examples include
+     * the attack damage on weapons or the armor value on armor.
+     * <p>
      * Only available when {@link #isItem()} is true.
      *
      * @param slot the {@link EquipmentSlot} to check
diff --git a/src/main/java/org/bukkit/inventory/ItemType.java b/src/main/java/org/bukkit/inventory/ItemType.java
index 2b5a18fe7e885fa9b581c0afb299e31f3db2690c..a6d1dde422de98f178c0c9add99e01203a35e5cb 100644
--- a/src/main/java/org/bukkit/inventory/ItemType.java
+++ b/src/main/java/org/bukkit/inventory/ItemType.java
@@ -2261,6 +2261,21 @@ public interface ItemType extends Keyed, Translatable, net.kyori.adventure.trans
 //    @NotNull
 //    EquipmentSlot getEquipmentSlot();
 
+    // Paper start - improve default item attribute API
+    /**
+     * Return an immutable copy of all default {@link Attribute}s and their
+     * {@link AttributeModifier}s.
+     * <p>
+     * Default attributes are those that are always preset on some items, unless
+     * they are specifically overridden on that {@link ItemStack}. Examples include
+     * the attack damage on weapons or the armor value on armor.
+     *
+     * @return the immutable {@link Multimap} with the respective default
+     * Attributes and modifiers, or an empty map if no attributes are set.
+     */
+    @NotNull @org.jetbrains.annotations.Unmodifiable Multimap<Attribute, AttributeModifier> getDefaultAttributeModifiers();
+    // Paper end - improve default item attribute API
+
     /**
      * Return an immutable copy of all default {@link Attribute}s and their
      * {@link AttributeModifier}s for a given {@link EquipmentSlot}.