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-rw-r--r--patches/server/0167-API-to-get-a-BlockState-without-a-snapshot.patch165
1 files changed, 165 insertions, 0 deletions
diff --git a/patches/server/0167-API-to-get-a-BlockState-without-a-snapshot.patch b/patches/server/0167-API-to-get-a-BlockState-without-a-snapshot.patch
new file mode 100644
index 0000000000..c2d8befb3f
--- /dev/null
+++ b/patches/server/0167-API-to-get-a-BlockState-without-a-snapshot.patch
@@ -0,0 +1,165 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <[email protected]>
+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 148e79ae4e24fe16dbbb17550c3f258d4362c266..06beb18e5e1950aeb6cb427876fcc4c5ea95adb2 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
+@@ -45,6 +45,7 @@ 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) {
+@@ -66,7 +67,7 @@ public abstract class BlockEntity {
+
+ // 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");
+ if (persistentDataTag instanceof CompoundTag) {
+@@ -240,8 +241,15 @@ 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 52fc42050d5df0882586c8f4bb4890ef1dbf979e..ba8f9ffed49bf377be8b37532d4f2bdcb8c44d82 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+@@ -329,6 +329,13 @@ 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 7629a51ec284cab0db7e9238027d6acfa4f3083c..a76cce199acdcecfdd8b998ec08974c2ed0751cf 100644
+--- 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 class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
+
+ private final T tileEntity;
+ private final T snapshot;
++ public final 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(snapshot);
++ if (this.snapshot != null) {
++ this.load(this.snapshot);
++ }
++ // Paper end
+ }
+
+ public void refreshSnapshot() {
+@@ -105,4 +116,11 @@ public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
+ public PersistentDataContainer getPersistentDataContainer() {
+ return this.getSnapshot().persistentDataContainer;
+ }
++
++ // 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 521d981e72955b1e2c96427882e336b034456678..e609cfeaf5aa6807f57360dde9b0dccf40a23eb1 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
+@@ -336,15 +336,30 @@ 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) {
+diff --git a/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java b/src/main/java/org/bukkit/craftbukkit/persistence/CraftPersistentDataContainer.java
+index 3fc3907172f12ee24ea70bd6a1ffbbc6084ed971..2c59f09a9261a1690951161fd856a5848d9885b7 100644
+--- 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 Map<String, Object> serialize() {
+ return (Map<String, Object>) CraftNBTTagConfigSerializer.serialize(this.toTagCompound());
+ }
++
++ // Paper start
++ public void clear() {
++ this.customDataTags.clear();
++ }
++ // Paper end
+ }