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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/world/entity/ai/attributes/Attribute;)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..57ea677907daa4689b8712b2686830197256a119
--- /dev/null
+++ b/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeMap.java
@@ -0,0 +1,33 @@
+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.bukkit.craftbukkit.attribute.CraftAttributeMap;
+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.world.entity.ai.attributes.Attribute nmsAttribute = CraftAttribute.bukkitToMinecraft(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/entity/CraftEntityType.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityType.java
index 33be9fa46c3bdb4958b32d30c730ceff075aaaea..85602b01b3bef4cd223a86b9b7cc85dbb4b3a105 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityType.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityType.java
@@ -164,6 +164,21 @@ public class CraftEntityType<E extends Entity> extends EntityType<E> {
}
// Paper end
+ // Paper start - default entity attributes
+ @Override
+ public boolean hasDefaultAttributes() {
+ return net.minecraft.world.entity.ai.attributes.DefaultAttributes.hasSupplier(this.entityType);
+ }
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public org.bukkit.attribute.Attributable getDefaultAttributes() {
+ Preconditions.checkArgument(this.hasDefaultAttributes(), this.key + " doesn't have default attributes");
+ net.minecraft.world.entity.ai.attributes.AttributeSupplier supplier = net.minecraft.world.entity.ai.attributes.DefaultAttributes.getSupplier((net.minecraft.world.entity.EntityType<? extends net.minecraft.world.entity.LivingEntity>) this.entityType);
+ return new io.papermc.paper.attribute.UnmodifiableAttributeMap(supplier);
+ }
+ // Paper end
+
public static class CraftEntityTypeRegistry extends CraftRegistry<EntityType<?>, net.minecraft.world.entity.EntityType<?>> {
private static final Map<NamespacedKey, Class<? extends Entity>> CLASS_MAP = new HashMap<>();
private static final Map<NamespacedKey, Boolean> SPAWNABLE = new HashMap<>();
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..7b999deba66aa6d22cd7520f6c13550a44ca327d
--- /dev/null
+++ b/src/test/java/io/papermc/paper/attribute/EntityTypeAttributesTest.java
@@ -0,0 +1,39 @@
+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.AbstractTestingBase;
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+
+public class EntityTypeAttributesTest extends AbstractTestingBase {
+
+ @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.GENERIC_ATTACK_DAMAGE));
+ AttributeInstance instance = attributable.getAttribute(Attribute.GENERIC_FOLLOW_RANGE);
+ assertNotNull(instance);
+ assertThrows(UnsupportedOperationException.class, () -> instance.addModifier(new AttributeModifier("test", 3, AttributeModifier.Operation.ADD_NUMBER)));
+ assertThrows(UnsupportedOperationException.class, () -> instance.setBaseValue(3.2));
+ }
+}
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