Paper/patches/server/0166-API-to-get-a-BlockState-without-a-snapshot.patch

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2021-06-11 14:02:28 +02:00
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 63acd109a79ed752a05df3d4f1b99309297c2055..d156f7cc71050f13b2feca00c52ca6b64572b60e 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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@@ -44,6 +44,7 @@ public abstract class BlockEntity {
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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) {
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@@ -65,7 +66,7 @@ public abstract class BlockEntity {
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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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@@ -239,8 +240,15 @@ public abstract class BlockEntity {
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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.BlockState state = this.level.getWorld().getBlockAt(this.worldPosition.getX(), this.worldPosition.getY(), this.worldPosition.getZ()).getState();
+ 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(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 1f5962457a15cae2162ce3899e0e7f167a854d11..9aa8c6c11d5aee83627cb91258c16844f791cd26 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
@@ -327,6 +327,13 @@ public class CraftBlock implements Block {
return CraftBlockStates.getBlockState(this);
}
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+ // Paper start
+ @Override
+ public BlockState getState(boolean useSnapshot) {
+ return CraftBlockStates.getBlockState(this, useSnapshot);
+ }
+ // Paper end
+
@Override
public Biome getBiome() {
return this.getWorld().getBiome(this.getX(), this.getY(), this.getZ());
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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 22af1b41eec06d660dbe47c463014bcdd96fc5b6..f046f507a095e0cb8f839b9b4b06add3a671486b 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
@@ -17,15 +17,26 @@ public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
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private final T tileEntity;
private final T snapshot;
+ public boolean snapshotDisabled; // Paper
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+ 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);
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- this.load(this.snapshot);
+ if (this.snapshot != null) {
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+ this.load(this.snapshot);
+ }
+ // Paper end
}
protected CraftBlockEntityState(CraftBlockEntityState<T> state) {
@@ -136,4 +147,11 @@ public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
public CraftBlockEntityState<T> copy() {
return new CraftBlockEntityState<>(this);
}
+
+ // Paper start
+ @Override
+ public boolean isSnapshot() {
+ return !this.snapshotDisabled;
+ }
+ // Paper end
}
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
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index 8561c16da0dccc55c89c7796cbe4f8792d01194f..c9ef19bdeeb130561659ff8161bf4e196cf4f53f 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
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@@ -379,15 +379,30 @@ public final class CraftBlockStates {
}
public static BlockState getBlockState(Block block) {
+ // Paper start
+ return CraftBlockStates.getBlockState(block, true);
+ }
+ public static BlockState getBlockState(Block block, boolean useSnapshot) {
+ // Paper end
Preconditions.checkNotNull(block, "block is null");
CraftBlock craftBlock = (CraftBlock) block;
CraftWorld world = (CraftWorld) block.getWorld();
BlockPos blockPosition = craftBlock.getPosition();
net.minecraft.world.level.block.state.BlockState blockData = craftBlock.getNMS();
BlockEntity tileEntity = craftBlock.getHandle().getBlockEntity(blockPosition);
+ // Paper start - block state snapshots
+ boolean prev = CraftBlockEntityState.DISABLE_SNAPSHOT;
+ CraftBlockEntityState.DISABLE_SNAPSHOT = !useSnapshot;
+ try {
+ // Paper end
CraftBlockState blockState = CraftBlockStates.getBlockState(world, blockPosition, blockData, tileEntity);
blockState.setWorldHandle(craftBlock.getHandle()); // Inject the block's generator access
return blockState;
+ // Paper start
+ } finally {
+ CraftBlockEntityState.DISABLE_SNAPSHOT = prev;
+ }
+ // Paper end
}
public static BlockState getBlockState(Material material, @Nullable CompoundTag blockEntityTag) {
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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
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index 6377a053e5d407fdae061e796657711828c5586e..ae5091433fd605c46b9c57f07114923918fad506 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
@@ -156,4 +156,10 @@ public class CraftPersistentDataContainer implements PersistentDataContainer {
public String serialize() {
return CraftNBTTagConfigSerializer.serialize(this.toTagCompound());
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}
+
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+ // Paper start
+ public void clear() {
+ this.customDataTags.clear();
+ }
+ // Paper end
}