Paper/patches/server/0166-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
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index 67315a86e5db51029d0f355c6dc223e93e4141db..29167adb4eeb83c108445c37e01dc4035b4c4be7 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) {
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@@ -259,10 +260,15 @@ 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
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index 155c0dee5d3485310c60b4f4c3240d1ac07eb873..3ba1c033e00b56abcef005c04fa88cd24dae93ad 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
@@ -314,7 +314,20 @@ 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
}