Paper/patches/server/0167-API-to-get-a-BlockState-without-a-snapshot.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 6 Nov 2017 21:08:22 -0500
Subject: [PATCH] API to get a BlockState without a snapshot
This allows you to get a BlockState without creating a snapshot, operating
on the real tile entity.
This is useful for where performance is needed
also Avoid NPE during CraftBlockEntityState load if could not get TE
If Tile Entity was null, correct Sign to return empty lines instead of null
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
index cbda40be6449acbe5a9fb4e5142df3b377c5f207..6f61fd8224fb4094f38a851300ab55f94523c252 100644
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--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
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@@ -45,6 +45,7 @@ public abstract class BlockEntity implements io.papermc.paper.util.KeyedObject {
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this.type = type;
this.worldPosition = pos.immutable();
this.blockState = state;
+ this.persistentDataContainer = new CraftPersistentDataContainer(DATA_TYPE_REGISTRY); // Paper - always init
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}
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public static BlockPos getPosFromTag(CompoundTag nbt) {
@@ -86,7 +87,7 @@ public abstract class BlockEntity implements io.papermc.paper.util.KeyedObject {
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// CraftBukkit start - read container
public void load(CompoundTag nbt) {
- this.persistentDataContainer = new CraftPersistentDataContainer(BlockEntity.DATA_TYPE_REGISTRY);
+ this.persistentDataContainer.clear(); // Paper - clear instead of init
net.minecraft.nbt.Tag persistentDataTag = nbt.get("PublicBukkitValues");
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if (persistentDataTag instanceof CompoundTag) {
@@ -260,10 +261,15 @@ public abstract class BlockEntity implements io.papermc.paper.util.KeyedObject {
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// CraftBukkit start - add method
public InventoryHolder getOwner() {
+ // Paper start
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+ return getOwner(true);
+ }
+ public InventoryHolder getOwner(boolean useSnapshot) {
+ // Paper end
if (this.level == null) return null;
org.bukkit.block.Block block = this.level.getWorld().getBlockAt(this.worldPosition.getX(), this.worldPosition.getY(), this.worldPosition.getZ());
if (block.getType() == org.bukkit.Material.AIR) return null;
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- org.bukkit.block.BlockState state = block.getState();
+ org.bukkit.block.BlockState state = block.getState(useSnapshot); // Paper
if (state instanceof InventoryHolder) return (InventoryHolder) state;
return null;
}
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
index d8b9a8276204ad8a2f045af9fe94185dbf150bc6..3250559589eb4db7b3df828144cee81a19651842 100644
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--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -317,7 +317,20 @@ public class CraftBlock implements Block {
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@Override
public BlockState getState() {
+ // Paper start
+ return this.getState(true);
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+ }
+
+ @Override
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+ public BlockState getState(boolean useSnapshot) {
+ boolean prev = CraftBlockEntityState.DISABLE_SNAPSHOT;
+ CraftBlockEntityState.DISABLE_SNAPSHOT = !useSnapshot;
+ try {
return CraftBlockStates.getBlockState(this);
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+ } finally {
+ CraftBlockEntityState.DISABLE_SNAPSHOT = prev;
+ }
+ // Paper end
}
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@Override
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diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
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index aa544f8be7d1db6fc6618d38efc40221afe85618..b98d442a8c749c59aff43189c3904ff4fb4cb353 100644
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--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
@@ -10,15 +10,26 @@ public abstract class CraftBlockEntityState<T extends BlockEntity> extends Craft
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private final T tileEntity;
private final T snapshot;
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+ public final boolean snapshotDisabled; // Paper
+ public static boolean DISABLE_SNAPSHOT = false; // Paper
public CraftBlockEntityState(World world, T tileEntity) {
super(world, tileEntity.getBlockPos(), tileEntity.getBlockState());
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this.tileEntity = tileEntity;
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+ // Paper start
+ this.snapshotDisabled = DISABLE_SNAPSHOT;
+ if (DISABLE_SNAPSHOT) {
+ this.snapshot = this.tileEntity;
+ } else {
+ this.snapshot = this.createSnapshot(tileEntity);
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+ }
// copy tile entity data:
- this.snapshot = this.createSnapshot(tileEntity);
- this.load(snapshot);
+ if (this.snapshot != null) {
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+ this.load(this.snapshot);
+ }
+ // Paper end
}
public void refreshSnapshot() {
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diff --git a/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java b/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
index ddd7b63f0452042baa3fca04bb9fbdb42fcecbfd..b638351581fa09c488425a2318b782a5812140ce 100644
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--- a/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
+++ b/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
@@ -155,4 +155,10 @@ public final class CraftPersistentDataContainer implements PersistentDataContain
public Map<String, Object> serialize() {
return (Map<String, Object>) CraftNBTTagConfigSerializer.serialize(this.toTagCompound());
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}
+
+ // Paper start
+ public void clear() {
+ this.customDataTags.clear();
+ }
+ // Paper end
}