Paper/patches/server/0169-PlayerPickupExperienceEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 19 Dec 2017 22:02:53 -0500
Subject: [PATCH] PlayerPickupExperienceEvent

Allows plugins to cancel a player picking up an experience orb

diff --git a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
index 16a1a005f2dda30cf804bf51638383ef3bfeb43e..80f4dfdbc410aa3346897e2ca63272a081712b6e 100644
--- a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
+++ b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
@@ -303,7 +303,7 @@ public class ExperienceOrb extends Entity {
     @Override
     public void playerTouch(Player player) {
         if (!this.level.isClientSide) {
-            if (player.takeXpDelay == 0) {
+            if (player.takeXpDelay == 0 && new com.destroystokyo.paper.event.player.PlayerPickupExperienceEvent(((net.minecraft.server.level.ServerPlayer) player).getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) this.getBukkitEntity()).callEvent()) { // Paper
                 player.takeXpDelay = 2;
                 player.take(this, 1);
                 int i = this.repairPlayerItems(player, this.value);