LootTableTest plugin

plugin.yml

name: LootTableTest
main: com.github.jikoo.TestPlugin
author: Jikoo
version: ${project.version}
api-version: 1.13

TestPlugin.java

package com.github.jikoo;

import java.util.concurrent.ThreadLocalRandom;
import org.bukkit.attribute.Attribute;
import org.bukkit.attribute.AttributeInstance;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.loot.LootContext;
import org.bukkit.loot.LootTable;
import org.bukkit.loot.Lootable;
import org.bukkit.plugin.java.JavaPlugin;

public class TestPlugin extends JavaPlugin implements Listener {

	@Override
	public void onEnable() {
		getServer().getPluginManager().registerEvents(this, this);
	}

	@EventHandler
	public void onEntityDamageByEntity(EntityDamageByEntityEvent event) {
		if (!(event.getDamager() instanceof Player) || !(event.getEntity() instanceof Lootable)
				|| !(event.getEntity() instanceof LivingEntity)) {
			return;
		}

		LivingEntity entity = (LivingEntity) event.getEntity();
		Lootable lootable = (Lootable) event.getEntity();
		LootTable lootTable = lootable.getLootTable();

		if (lootTable == null) {
			return;
		}

		Player killer = (Player) event.getDamager();
		LootContext.Builder contextBuilder = new LootContext.Builder(entity.getLocation()).lootedEntity(entity).killer(killer);
		AttributeInstance attributeLuck = killer.getAttribute(Attribute.GENERIC_LUCK);

		if (attributeLuck != null) {
			contextBuilder.luck(((float) attributeLuck.getValue()));
		}

		contextBuilder.lootingModifier(killer.getInventory().getItemInMainHand().getEnchantmentLevel(Enchantment.LOOT_BONUS_MOBS));

		LootContext context = contextBuilder.build();

		for (ItemStack loot : lootTable.populateLoot(ThreadLocalRandom.current(), context)) {
			entity.getWorld().dropItemNaturally(entity.getLocation(), loot);
		}
	}

}