From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Jake Potrebic <jake.m.potrebic@gmail.com> Date: Fri, 20 Aug 2021 13:03:21 -0700 Subject: [PATCH] Get entity default attributes == AT == public net.minecraft.world.entity.ai.attributes.AttributeSupplier getAttributeInstance(Lnet/minecraft/core/Holder;)Lnet/minecraft/world/entity/ai/attributes/AttributeInstance; diff --git a/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java new file mode 100644 index 0000000000000000000000000000000000000000..12135ffeacd648f6bc4d7d327059ea1a7e8c79c4 --- /dev/null +++ b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java @@ -0,0 +1,30 @@ +package io.papermc.paper.attribute; + +import net.minecraft.world.entity.ai.attributes.AttributeInstance; +import org.bukkit.attribute.Attribute; +import org.bukkit.attribute.AttributeModifier; +import org.bukkit.craftbukkit.attribute.CraftAttributeInstance; + +import java.util.Collection; + +public class UnmodifiableAttributeInstance extends CraftAttributeInstance { + + public UnmodifiableAttributeInstance(AttributeInstance handle, Attribute attribute) { + super(handle, attribute); + } + + @Override + public void setBaseValue(double d) { + throw new UnsupportedOperationException("Cannot modify default attributes"); + } + + @Override + public void addModifier(AttributeModifier modifier) { + throw new UnsupportedOperationException("Cannot modify default attributes"); + } + + @Override + public void removeModifier(AttributeModifier modifier) { + throw new UnsupportedOperationException("Cannot modify default attributes"); + } +} diff --git a/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeMap.java b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeMap.java new file mode 100644 index 0000000000000000000000000000000000000000..ec9ebd2d539333293c51b7edfa18f18b066d7e43 --- /dev/null +++ b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeMap.java @@ -0,0 +1,32 @@ +package io.papermc.paper.attribute; + +import net.minecraft.world.entity.ai.attributes.AttributeSupplier; +import org.bukkit.attribute.Attributable; +import org.bukkit.attribute.Attribute; +import org.bukkit.attribute.AttributeInstance; +import org.bukkit.craftbukkit.attribute.CraftAttribute; +import org.jetbrains.annotations.NotNull; +import org.jetbrains.annotations.Nullable; + +public class UnmodifiableAttributeMap implements Attributable { + + private final AttributeSupplier handle; + + public UnmodifiableAttributeMap(@NotNull AttributeSupplier handle) { + this.handle = handle; + } + + @Override + public @Nullable AttributeInstance getAttribute(@NotNull Attribute attribute) { + net.minecraft.core.Holder<net.minecraft.world.entity.ai.attributes.Attribute> nmsAttribute = CraftAttribute.bukkitToMinecraftHolder(attribute); + if (!this.handle.hasAttribute(nmsAttribute)) { + return null; + } + return new UnmodifiableAttributeInstance(this.handle.getAttributeInstance(nmsAttribute), attribute); + } + + @Override + public void registerAttribute(@NotNull Attribute attribute) { + throw new UnsupportedOperationException("Cannot register new attributes here"); + } +} diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java index 6855210dc58f455b5af05d9c039da55e8dfc93f1..1dd9a5cc45d5073adb150abdcbe2025e6ed2c315 100644 --- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java +++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java @@ -560,6 +560,18 @@ public final class CraftMagicNumbers implements UnsafeValues { } return CraftItemStack.unwrap(itemToBeRepaired).isValidRepairItem(CraftItemStack.unwrap(repairMaterial)); } + + @Override + public boolean hasDefaultEntityAttributes(NamespacedKey bukkitEntityKey) { + return net.minecraft.world.entity.ai.attributes.DefaultAttributes.hasSupplier(net.minecraft.core.registries.BuiltInRegistries.ENTITY_TYPE.getValue(CraftNamespacedKey.toMinecraft(bukkitEntityKey))); + } + + @Override + public org.bukkit.attribute.Attributable getDefaultEntityAttributes(NamespacedKey bukkitEntityKey) { + Preconditions.checkArgument(hasDefaultEntityAttributes(bukkitEntityKey), bukkitEntityKey + " doesn't have default attributes"); + var supplier = net.minecraft.world.entity.ai.attributes.DefaultAttributes.getSupplier((net.minecraft.world.entity.EntityType<? extends net.minecraft.world.entity.LivingEntity>) net.minecraft.core.registries.BuiltInRegistries.ENTITY_TYPE.getValue(CraftNamespacedKey.toMinecraft(bukkitEntityKey))); + return new io.papermc.paper.attribute.UnmodifiableAttributeMap(supplier); + } // Paper end /** diff --git a/src/test/java/io/papermc/paper/attribute/EntityTypeAttributesTest.java b/src/test/java/io/papermc/paper/attribute/EntityTypeAttributesTest.java new file mode 100644 index 0000000000000000000000000000000000000000..fa9fb37993f4025f85dac084efb4b5eda0ede637 --- /dev/null +++ b/src/test/java/io/papermc/paper/attribute/EntityTypeAttributesTest.java @@ -0,0 +1,40 @@ +package io.papermc.paper.attribute; + +import org.bukkit.attribute.Attributable; +import org.bukkit.attribute.Attribute; +import org.bukkit.attribute.AttributeInstance; +import org.bukkit.attribute.AttributeModifier; +import org.bukkit.entity.EntityType; +import org.bukkit.support.environment.AllFeatures; +import org.junit.jupiter.api.Test; + +import static org.junit.jupiter.api.Assertions.assertFalse; +import static org.junit.jupiter.api.Assertions.assertNotNull; +import static org.junit.jupiter.api.Assertions.assertThrows; +import static org.junit.jupiter.api.Assertions.assertTrue; + +@AllFeatures +public class EntityTypeAttributesTest { + + @Test + public void testIllegalEntity() { + assertFalse(EntityType.EGG.hasDefaultAttributes()); + assertThrows(IllegalArgumentException.class, EntityType.EGG::getDefaultAttributes); + } + + @Test + public void testLegalEntity() { + assertTrue(EntityType.ZOMBIE.hasDefaultAttributes()); + EntityType.ZOMBIE.getDefaultAttributes(); + } + + @Test + public void testUnmodifiabilityOfAttributable() { + Attributable attributable = EntityType.ZOMBIE.getDefaultAttributes(); + assertThrows(UnsupportedOperationException.class, () -> attributable.registerAttribute(Attribute.ATTACK_DAMAGE)); + AttributeInstance instance = attributable.getAttribute(Attribute.FOLLOW_RANGE); + assertNotNull(instance); + assertThrows(UnsupportedOperationException.class, () -> instance.addModifier(new AttributeModifier("test", 3, AttributeModifier.Operation.ADD_NUMBER))); + assertThrows(UnsupportedOperationException.class, () -> instance.setBaseValue(3.2)); + } +}