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Paper/patches/server/0160-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 d20f71a2098b327423cbdbbc096aa9e358cb809d..7147484eefad44ba67db03b6ef2090a596e278de 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
@@ -58,6 +58,7 @@ public abstract class BlockEntity {
this.type = type;
this.worldPosition = pos.immutable();
this.blockState = state;
+ this.persistentDataContainer = new CraftPersistentDataContainer(DATA_TYPE_REGISTRY); // Paper - always init
}
public static BlockPos getPosFromTag(CompoundTag nbt) {
@@ -79,7 +80,7 @@ public abstract class BlockEntity {
// CraftBukkit start - read container
protected void loadAdditional(CompoundTag nbt, HolderLookup.Provider registryLookup) {
- this.persistentDataContainer = new CraftPersistentDataContainer(BlockEntity.DATA_TYPE_REGISTRY);
+ this.persistentDataContainer.clear(); // Paper - clear instead of init
net.minecraft.nbt.Tag persistentDataTag = nbt.get("PublicBukkitValues");
if (persistentDataTag instanceof CompoundTag) {
@@ -363,8 +364,15 @@ public abstract class BlockEntity {
// CraftBukkit start - add method
public InventoryHolder getOwner() {
+ // Paper start
+ 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;
+ 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 a1c1a101aa424e74309f6f4c0a53a6a8db5df441..013298c424025cd88f15d61e50d196f70fa4c58b 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
@@ -328,6 +328,13 @@ public class CraftBlock implements Block {
return CraftBlockStates.getBlockState(this);
}
+ // 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());
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
index f8b5595dc92036cc1889c0835f69389c93501fa7..a7bb7d263cb981fcf6dd35a3b32270e89e96945a 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
@@ -24,15 +24,26 @@ public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
private final T tileEntity;
private final T snapshot;
+ public boolean snapshotDisabled; // Paper
+ public static boolean DISABLE_SNAPSHOT = false; // Paper
public CraftBlockEntityState(World world, T tileEntity) {
super(world, tileEntity.getBlockPos(), tileEntity.getBlockState());
this.tileEntity = tileEntity;
+ // Paper start
+ this.snapshotDisabled = DISABLE_SNAPSHOT;
+ if (DISABLE_SNAPSHOT) {
+ this.snapshot = this.tileEntity;
+ } else {
+ this.snapshot = this.createSnapshot(tileEntity);
+ }
// copy tile entity data:
- this.snapshot = this.createSnapshot(tileEntity);
- this.load(this.snapshot);
+ if (this.snapshot != null) {
+ this.load(this.snapshot);
+ }
+ // Paper end
}
protected CraftBlockEntityState(CraftBlockEntityState<T> state, Location location) {
@@ -169,4 +180,11 @@ public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
public CraftBlockEntityState<T> copy(Location location) {
return new CraftBlockEntityState<>(this, location);
}
+
+ // 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
index 0173a8eac2153d889536e48970f967040490e4b7..83ac5fc6cbbd249b5865ab203b150f53f01c9f05 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
@@ -387,15 +387,30 @@ 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
}
@Deprecated
diff --git a/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java b/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
index dbb9a5b2f8d3bc0b13e0f56f6e8a0d9a7b761327..3001bb0e3d4af9b16645a0136093db594b89ab01 100644
--- a/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
+++ b/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
@@ -177,4 +177,10 @@ public class CraftPersistentDataContainer implements PersistentDataContainer {
public String serialize() {
return CraftNBTTagConfigSerializer.serialize(this.toTagCompound());
}
+
+ // Paper start
+ public void clear() {
+ this.customDataTags.clear();
+ }
+ // Paper end
}
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