ExperienceOrbs API for Reason/Source/Triggering player

Adds lots of information about why this orb exists.

Replaces isFromBottle() with logic that persists entity reloads too.

paper-server/patches/sources/net/minecraft/server/level/ServerPlayerGameMode.java.patch

@@ -283,7 +283,7 @@
 +
 +                // Drop event experience
 +                if (flag && event != null) {
-+                    iblockdata.getBlock().popExperience(this.level, pos, event.getExpToDrop());
++                    iblockdata.getBlock().popExperience(this.level, pos, event.getExpToDrop(), this.player); // Paper
 +                }
 +
 +                return true;

paper-server/patches/sources/net/minecraft/world/entity/ExperienceOrb.java.patch

@@ -14,7 +14,71 @@
  
  public class ExperienceOrb extends Entity {
  
-@@ -68,6 +75,7 @@
+@@ -37,9 +44,63 @@
+     public int value;
+     public int count;
+     private Player followingPlayer;
++    // Paper start
++    @javax.annotation.Nullable
++    public java.util.UUID sourceEntityId;
++    @javax.annotation.Nullable
++    public java.util.UUID triggerEntityId;
++    public org.bukkit.entity.ExperienceOrb.SpawnReason spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
+ 
++    private void loadPaperNBT(CompoundTag tag) {
++        if (!tag.contains("Paper.ExpData", net.minecraft.nbt.Tag.TAG_COMPOUND)) {
++            return;
++        }
++        CompoundTag comp = tag.getCompound("Paper.ExpData");
++        if (comp.hasUUID("source")) {
++            this.sourceEntityId = comp.getUUID("source");
++        }
++        if (comp.hasUUID("trigger")) {
++            this.triggerEntityId = comp.getUUID("trigger");
++        }
++        if (comp.contains("reason")) {
++            String reason = comp.getString("reason");
++            try {
++                this.spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.valueOf(reason);
++            } catch (Exception e) {
++                this.level().getCraftServer().getLogger().warning("Invalid spawnReason set for experience orb: " + e.getMessage() + " - " + reason);
++            }
++        }
++    }
++    private void savePaperNBT(CompoundTag tag) {
++        CompoundTag comp = new CompoundTag();
++        if (this.sourceEntityId != null) {
++            comp.putUUID("source", this.sourceEntityId);
++        }
++        if (this.triggerEntityId != null) {
++            comp.putUUID("trigger", triggerEntityId);
++        }
++        if (this.spawnReason != null && this.spawnReason != org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN) {
++            comp.putString("reason", this.spawnReason.name());
++        }
++        tag.put("Paper.ExpData", comp);
++    }
++
++    @io.papermc.paper.annotation.DoNotUse
++    @Deprecated
+     public ExperienceOrb(Level world, double x, double y, double z, int amount) {
++        this(world, x, y, z, amount, null, null);
++    }
++
++    public ExperienceOrb(Level world, double x, double y, double z, int amount, @javax.annotation.Nullable org.bukkit.entity.ExperienceOrb.SpawnReason reason, @javax.annotation.Nullable Entity triggerId) {
++        this(world, x, y, z, amount, reason, triggerId, null);
++    }
++
++    public ExperienceOrb(Level world, double x, double y, double z, int amount, @javax.annotation.Nullable org.bukkit.entity.ExperienceOrb.SpawnReason reason, @javax.annotation.Nullable Entity triggerId, @javax.annotation.Nullable Entity sourceId) {
+         this(EntityType.EXPERIENCE_ORB, world);
++        this.sourceEntityId = sourceId != null ? sourceId.getUUID() : null;
++        this.triggerEntityId = triggerId != null ? triggerId.getUUID() : null;
++        this.spawnReason = reason != null ? reason : org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
++        // Paper end
+         this.setPos(x, y, z);
+         this.setYRot((float) (this.random.nextDouble() * 360.0D));
+         this.setDeltaMovement((this.random.nextDouble() * 0.20000000298023224D - 0.10000000149011612D) * 2.0D, this.random.nextDouble() * 0.2D * 2.0D, (this.random.nextDouble() * 0.20000000298023224D - 0.10000000149011612D) * 2.0D);
+@@ -68,6 +129,7 @@
      @Override
      public void tick() {
          super.tick();
@@ -22,7 +86,7 @@
          this.xo = this.getX();
          this.yo = this.getY();
          this.zo = this.getZ();
-@@ -93,7 +101,22 @@
+@@ -93,7 +155,22 @@
              this.followingPlayer = null;
          }
  
@@ -46,7 +110,7 @@
              Vec3 vec3d = new Vec3(this.followingPlayer.getX() - this.getX(), this.followingPlayer.getY() + (double) this.followingPlayer.getEyeHeight() / 2.0D - this.getY(), this.followingPlayer.getZ() - this.getZ());
              double d0 = vec3d.lengthSqr();
  
-@@ -121,7 +144,7 @@
+@@ -121,7 +198,7 @@
  
          ++this.age;
          if (this.age >= 6000) {
@@ -55,7 +119,29 @@
          }
  
      }
-@@ -190,7 +213,7 @@
+@@ -150,12 +227,20 @@
+     }
+ 
+     public static void award(ServerLevel world, Vec3 pos, int amount) {
++        // Paper start - add reasons for orbs
++        award(world, pos, amount, null, null, null);
++    }
++    public static void award(ServerLevel world, Vec3 pos, int amount, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId) {
++        award(world, pos, amount, reason, triggerId, null);
++    }
++    public static void award(ServerLevel world, Vec3 pos, int amount, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId, Entity sourceId) {
++        // Paper end - add reasons for orbs
+         while (amount > 0) {
+             int j = ExperienceOrb.getExperienceValue(amount);
+ 
+             amount -= j;
+             if (!ExperienceOrb.tryMergeToExisting(world, pos, j)) {
+-                world.addFreshEntity(new ExperienceOrb(world, pos.x(), pos.y(), pos.z(), j));
++                world.addFreshEntity(new ExperienceOrb(world, pos.x(), pos.y(), pos.z(), j, reason, triggerId, sourceId)); // Paper - add reason
+             }
+         }
+ 
+@@ -190,7 +275,7 @@
      private void merge(ExperienceOrb other) {
          this.count += other.count;
          this.age = Math.min(this.age, other.age);
@@ -64,7 +150,7 @@
      }
  
      private void setUnderwaterMovement() {
-@@ -215,7 +238,7 @@
+@@ -215,7 +300,7 @@
              this.markHurt();
              this.health = (int) ((float) this.health - amount);
              if (this.health <= 0) {
@@ -73,7 +159,22 @@
              }
  
              return true;
-@@ -242,17 +265,17 @@
+@@ -228,6 +313,7 @@
+         nbt.putShort("Age", (short) this.age);
+         nbt.putShort("Value", (short) this.value);
+         nbt.putInt("Count", this.count);
++        this.savePaperNBT(nbt); // Paper
+     }
+ 
+     @Override
+@@ -236,23 +322,24 @@
+         this.age = nbt.getShort("Age");
+         this.value = nbt.getShort("Value");
+         this.count = Math.max(nbt.getInt("Count"), 1);
++        this.loadPaperNBT(nbt); // Paper
+     }
+ 
+     @Override
      public void playerTouch(Player player) {
          if (player instanceof ServerPlayer entityplayer) {
              if (player.takeXpDelay == 0) {
@@ -94,7 +195,7 @@
                  }
              }
  
-@@ -266,12 +289,20 @@
+@@ -266,12 +353,20 @@
              ItemStack itemstack = ((EnchantedItemInUse) optional.get()).itemStack();
              int j = EnchantmentHelper.modifyDurabilityToRepairFromXp(player.serverLevel(), itemstack, amount);
              int k = Math.min(j, itemstack.getDamageValue());
@@ -115,7 +216,7 @@
                      return this.repairPlayerItems(player, l);
                  }
              }
-@@ -291,6 +322,24 @@
+@@ -291,6 +386,24 @@
      }
  
      public static int getExperienceValue(int value) {

paper-server/patches/sources/net/minecraft/world/entity/LivingEntity.java.patch

@@ -805,7 +805,7 @@
 +    protected void dropExperience(ServerLevel world, @Nullable Entity attacker) {
 +        // CraftBukkit start - Update getExpReward() above if the removed if() changes!
 +        if (!(this instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon)) { // CraftBukkit - SPIGOT-2420: Special case ender dragon will drop the xp over time
-+            ExperienceOrb.award(world, this.position(), this.expToDrop);
++            ExperienceOrb.award(world, this.position(), this.expToDrop, this instanceof ServerPlayer ? org.bukkit.entity.ExperienceOrb.SpawnReason.PLAYER_DEATH : org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, attacker, this); // Paper
 +            this.expToDrop = 0;
 +        }
 +        // CraftBukkit end

paper-server/patches/sources/net/minecraft/world/entity/animal/Animal.java.patch

@@ -58,7 +58,7 @@
  
          this.level().broadcastEntityEvent(this, (byte) 18);
      }
-@@ -233,25 +254,46 @@
+@@ -233,25 +254,48 @@
          if (entityageable != null) {
              entityageable.setBaby(true);
              entityageable.moveTo(this.getX(), this.getY(), this.getZ(), 0.0F, 0.0F);
@@ -81,20 +81,25 @@
      }
  
      public void finalizeSpawnChildFromBreeding(ServerLevel world, Animal other, @Nullable AgeableMob baby) {
+-        Optional.ofNullable(this.getLoveCause()).or(() -> {
+-            return Optional.ofNullable(other.getLoveCause());
+-        }).ifPresent((entityplayer) -> {
 +        // CraftBukkit start
 +        this.finalizeSpawnChildFromBreeding(world, other, baby, this.getRandom().nextInt(7) + 1);
 +    }
 +
 +    public void finalizeSpawnChildFromBreeding(ServerLevel worldserver, Animal entityanimal, @Nullable AgeableMob entityageable, int experience) {
 +        // CraftBukkit end
-         Optional.ofNullable(this.getLoveCause()).or(() -> {
--            return Optional.ofNullable(other.getLoveCause());
-+            return Optional.ofNullable(entityanimal.getLoveCause());
-         }).ifPresent((entityplayer) -> {
++        // Paper start
++        ServerPlayer entityplayer = this.getLoveCause();
++        if (entityplayer == null) entityplayer = entityanimal.getLoveCause();
++        if (entityplayer != null) {
++            // Paper end
              entityplayer.awardStat(Stats.ANIMALS_BRED);
 -            CriteriaTriggers.BRED_ANIMALS.trigger(entityplayer, this, other, baby);
+-        });
 +            CriteriaTriggers.BRED_ANIMALS.trigger(entityplayer, this, entityanimal, entityageable);
-         });
++        } // Paper
          this.setAge(6000);
 -        other.setAge(6000);
 +        entityanimal.setAge(6000);
@@ -108,7 +113,7 @@
 +        if (worldserver.getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
 +            // CraftBukkit start - use event experience
 +            if (experience > 0) {
-+                worldserver.addFreshEntity(new ExperienceOrb(worldserver, this.getX(), this.getY(), this.getZ(), experience));
++                worldserver.addFreshEntity(new ExperienceOrb(worldserver, this.getX(), this.getY(), this.getZ(), experience, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer, entityageable)); // Paper
 +            }
 +            // CraftBukkit end
          }

paper-server/patches/sources/net/minecraft/world/entity/animal/Fox.java.patch

@@ -60,7 +60,7 @@
 -                    this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), this.animal.getRandom().nextInt(7) + 1));
 +                    // CraftBukkit start - use event experience
 +                    if (experience > 0) {
-+                        this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), experience));
++                        this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), experience, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer, entityfox)); // Paper
 +                    }
 +                    // CraftBukkit end
                  }

paper-server/patches/sources/net/minecraft/world/entity/animal/Turtle.java.patch

@@ -19,6 +19,15 @@
      }
  
      @Override
+@@ -460,7 +462,7 @@
+             RandomSource randomsource = this.animal.getRandom();
+ 
+             if (getServerLevel((Level) this.level).getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
+-                this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), randomsource.nextInt(7) + 1));
++                this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), randomsource.nextInt(7) + 1, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer)); // Paper;
+             }
+ 
+         }
 @@ -496,12 +498,14 @@
                  } else if (this.turtle.layEggCounter > this.adjustedTickDelay(200)) {
                      Level world = this.turtle.level();

paper-server/patches/sources/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java.patch

@@ -205,8 +205,9 @@
  
          if (world instanceof ServerLevel worldserver) {
 -            if (this.dragonDeathTime > 150 && this.dragonDeathTime % 5 == 0 && worldserver.getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
+-                ExperienceOrb.award(worldserver, this.position(), Mth.floor((float) short0 * 0.08F));
 +            if (this.dragonDeathTime > 150 && this.dragonDeathTime % 5 == 0 && true) {  // CraftBukkit - SPIGOT-2420: Already checked for the game rule when calculating the xp
-                 ExperienceOrb.award(worldserver, this.position(), Mth.floor((float) short0 * 0.08F));
++                ExperienceOrb.award(worldserver, this.position(), Mth.floor((float) short0 * 0.08F), org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, this.lastHurtByPlayer, this); // Paper
              }
  
              if (this.dragonDeathTime == 1 && !this.isSilent()) {
@@ -233,16 +234,17 @@
              }
          }
  
-@@ -592,7 +704,7 @@
+@@ -592,15 +704,15 @@
              if (world1 instanceof ServerLevel) {
                  ServerLevel worldserver1 = (ServerLevel) world1;
  
 -                if (worldserver1.getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
+-                    ExperienceOrb.award(worldserver1, this.position(), Mth.floor((float) short0 * 0.2F));
 +                if (true) { // CraftBukkit - SPIGOT-2420: Already checked for the game rule when calculating the xp
-                     ExperienceOrb.award(worldserver1, this.position(), Mth.floor((float) short0 * 0.2F));
++                    ExperienceOrb.award(worldserver1, this.position(), Mth.floor((float) short0 * 0.2F), org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, this.lastHurtByPlayer, this); // Paper
                  }
  
-@@ -600,7 +712,7 @@
+                 if (this.dragonFight != null) {
                      this.dragonFight.setDragonKilled(this);
                  }
  

paper-server/patches/sources/net/minecraft/world/entity/npc/Villager.java.patch

@@ -24,25 +24,25 @@
      }
  
      @Override
-@@ -214,7 +222,18 @@
- 
-     public boolean assignProfessionWhenSpawned() {
+@@ -216,7 +224,18 @@
          return this.assignProfessionWhenSpawned;
-+    }
-+
+     }
+ 
 +    // Spigot Start
-+    @Override
+     @Override
 +    public void inactiveTick() {
 +        // SPIGOT-3874, SPIGOT-3894, SPIGOT-3846, SPIGOT-5286 :(
 +        if (this.level().spigotConfig.tickInactiveVillagers && this.isEffectiveAi()) {
 +            this.customServerAiStep((ServerLevel) this.level());
 +        }
 +        super.inactiveTick();
-     }
++    }
 +    // Spigot End
- 
-     @Override
++
++    @Override
      protected void customServerAiStep(ServerLevel world) {
+         ProfilerFiller gameprofilerfiller = Profiler.get();
+ 
 @@ -235,7 +254,7 @@
                      this.increaseProfessionLevelOnUpdate = false;
                  }
@@ -100,6 +100,15 @@
              Logger logger = Villager.LOGGER;
  
              Objects.requireNonNull(logger);
+@@ -599,7 +630,7 @@
+         }
+ 
+         if (offer.shouldRewardExp()) {
+-            this.level().addFreshEntity(new ExperienceOrb(this.level(), this.getX(), this.getY() + 0.5D, this.getZ(), i));
++            this.level().addFreshEntity(new ExperienceOrb(this.level(), this.getX(), this.getY() + 0.5D, this.getZ(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.getTradingPlayer(), this)); // Paper
+         }
+ 
+     }
 @@ -618,7 +649,7 @@
  
      @Override

paper-server/patches/sources/net/minecraft/world/entity/npc/WanderingTrader.java.patch

@@ -44,6 +44,15 @@
                  }
  
              }
+@@ -190,7 +208,7 @@
+         if (offer.shouldRewardExp()) {
+             int i = 3 + this.random.nextInt(4);
+ 
+-            this.level().addFreshEntity(new ExperienceOrb(this.level(), this.getX(), this.getY() + 0.5D, this.getZ(), i));
++            this.level().addFreshEntity(new ExperienceOrb(this.level(), this.getX(), this.getY() + 0.5D, this.getZ(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.getTradingPlayer(), this)); // Paper
+         }
+ 
+     }
 @@ -244,7 +262,7 @@
  
      private void maybeDespawn() {

paper-server/patches/sources/net/minecraft/world/entity/projectile/FishingHook.java.patch

@@ -211,7 +211,7 @@
 -                    entityhuman.level().addFreshEntity(new ExperienceOrb(entityhuman.level(), entityhuman.getX(), entityhuman.getY() + 0.5D, entityhuman.getZ() + 0.5D, this.random.nextInt(6) + 1));
 +                    // CraftBukkit start - this.random.nextInt(6) + 1 -> playerFishEvent.getExpToDrop()
 +                    if (playerFishEvent.getExpToDrop() > 0) {
-+                        entityhuman.level().addFreshEntity(new ExperienceOrb(entityhuman.level(), entityhuman.getX(), entityhuman.getY() + 0.5D, entityhuman.getZ() + 0.5D, playerFishEvent.getExpToDrop()));
++                        entityhuman.level().addFreshEntity(new ExperienceOrb(entityhuman.level(), entityhuman.getX(), entityhuman.getY() + 0.5D, entityhuman.getZ() + 0.5D, playerFishEvent.getExpToDrop(), org.bukkit.entity.ExperienceOrb.SpawnReason.FISHING, this.getPlayerOwner(), this)); // Paper
 +                    }
 +                    // CraftBukkit end
                      if (itemstack1.is(ItemTags.FISHES)) {

paper-server/patches/sources/net/minecraft/world/entity/projectile/ThrownExperienceBottle.java.patch

@@ -19,6 +19,8 @@
 +            // this.level().levelEvent(2002, this.blockPosition(), -13083194);
              int i = 3 + this.level().random.nextInt(5) + this.level().random.nextInt(5);
  
+-            ExperienceOrb.award((ServerLevel) this.level(), this.position(), i);
+-            this.discard();
 +            // CraftBukkit start
 +            org.bukkit.event.entity.ExpBottleEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callExpBottleEvent(this, hitResult, i);
 +            i = event.getExperience();
@@ -27,8 +29,7 @@
 +            }
 +            // CraftBukkit end
 +
-             ExperienceOrb.award((ServerLevel) this.level(), this.position(), i);
--            this.discard();
++            ExperienceOrb.award((ServerLevel) this.level(), this.position(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.EXP_BOTTLE, this.getOwner(), this); // Paper
 +            this.discard(EntityRemoveEvent.Cause.HIT); // CraftBukkit - add Bukkit remove cause
          }
  

paper-server/patches/sources/net/minecraft/world/inventory/GrindstoneMenu.java.patch

@@ -65,7 +65,7 @@
              @Override
              public boolean mayPlace(ItemStack stack) {
                  return stack.isDamageableItem() || EnchantmentHelper.hasAnyEnchantments(stack);
-@@ -68,7 +95,7 @@
+@@ -68,10 +95,10 @@
              }
  
              @Override
@@ -73,7 +73,11 @@
 +            public void onTake(net.minecraft.world.entity.player.Player player, ItemStack stack) {
                  context.execute((world, blockposition) -> {
                      if (world instanceof ServerLevel) {
-                         ExperienceOrb.award((ServerLevel) world, Vec3.atCenterOf(blockposition), this.getExperienceAmount(world));
+-                        ExperienceOrb.award((ServerLevel) world, Vec3.atCenterOf(blockposition), this.getExperienceAmount(world));
++                        ExperienceOrb.award((ServerLevel) world, Vec3.atCenterOf(blockposition), this.getExperienceAmount(world), org.bukkit.entity.ExperienceOrb.SpawnReason.GRINDSTONE, player); // Paper
+                     }
+ 
+                     world.levelEvent(1042, blockposition, 0);
 @@ -113,6 +140,7 @@
              }
          });

paper-server/patches/sources/net/minecraft/world/level/block/Block.java.patch

@@ -15,7 +15,22 @@
                  return;
              }
          }
-@@ -369,7 +375,7 @@
+@@ -348,8 +354,13 @@
+     }
+ 
+     public void popExperience(ServerLevel world, BlockPos pos, int size) {
++        // Paper start - add entity parameter
++        popExperience(world, pos, size, null);
++    }
++    public void popExperience(ServerLevel world, BlockPos pos, int size, net.minecraft.world.entity.Entity entity) {
++        // Paper end - add entity parameter
+         if (world.getGameRules().getBoolean(GameRules.RULE_DOBLOCKDROPS)) {
+-            ExperienceOrb.award(world, Vec3.atCenterOf(pos), size);
++            ExperienceOrb.award(world, Vec3.atCenterOf(pos), size, org.bukkit.entity.ExperienceOrb.SpawnReason.BLOCK_BREAK, entity); // Paper
+         }
+ 
+     }
+@@ -369,7 +380,7 @@
  
      public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
          player.awardStat(Stats.BLOCK_MINED.get(this));
@@ -24,7 +39,7 @@
          Block.dropResources(state, world, pos, blockEntity, player, tool);
      }
  
-@@ -490,15 +496,35 @@
+@@ -490,15 +501,35 @@
          return this.builtInRegistryHolder;
      }
  

paper-server/patches/sources/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java.patch

@@ -266,7 +266,7 @@
 +        j = event.getExpToDrop();
 +        // CraftBukkit end
 +
-+        ExperienceOrb.award(worldserver, vec3d, j);
++        ExperienceOrb.award(worldserver, vec3d, j, org.bukkit.entity.ExperienceOrb.SpawnReason.FURNACE, entityhuman); // Paper
      }
  
      @Override

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java

@@ -424,7 +424,7 @@ public final class CraftEntityTypes {
             return item;
         }));
         register(new EntityTypeData<>(EntityType.EXPERIENCE_ORB, ExperienceOrb.class, CraftExperienceOrb::new,
-                spawnData -> new net.minecraft.world.entity.ExperienceOrb(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), 0)
+                spawnData -> new net.minecraft.world.entity.ExperienceOrb(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), 0, org.bukkit.entity.ExperienceOrb.SpawnReason.CUSTOM, null, null) // Paper
         ));
         register(new EntityTypeData<>(EntityType.AREA_EFFECT_CLOUD, AreaEffectCloud.class, CraftAreaEffectCloud::new, spawnData -> new net.minecraft.world.entity.AreaEffectCloud(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z())));
         register(new EntityTypeData<>(EntityType.EGG, Egg.class, CraftEgg::new, spawnData -> new ThrownEgg(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), new net.minecraft.world.item.ItemStack(Items.EGG))));

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java

@@ -18,6 +18,18 @@ public class CraftExperienceOrb extends CraftEntity implements ExperienceOrb {
         this.getHandle().value = value;
     }
 
+    // Paper start
+    public java.util.UUID getTriggerEntityId() {
+        return getHandle().triggerEntityId;
+    }
+    public java.util.UUID getSourceEntityId() {
+        return getHandle().sourceEntityId;
+    }
+    public SpawnReason getSpawnReason() {
+        return getHandle().spawnReason;
+    }
+    // Paper end
+
     @Override
     public net.minecraft.world.entity.ExperienceOrb getHandle() {
         return (net.minecraft.world.entity.ExperienceOrb) this.entity;