Upstream Paper

src/main/java/net/minecraft/server/BlockData.java

@@ -0,0 +1,25 @@
+package net.minecraft.server;
+
+import com.google.common.collect.ImmutableMap;
+import org.bukkit.craftbukkit.block.data.CraftBlockData;
+
+public class BlockData extends BlockDataAbstract<Block, IBlockData> implements IBlockData {
+
+    public BlockData(Block block, ImmutableMap<IBlockState<?>, Comparable<?>> immutablemap) {
+        super(block, immutablemap);
+    }
+
+    public Block getBlock() {
+        return (Block) this.e_;
+    }
+
+    // Paper start - impl cached craft block data, lazy load to fix issue with loading at the wrong time
+    private CraftBlockData cachedCraftBlockData;
+
+    @Override
+    public CraftBlockData createCraftBlockData() {
+        if(cachedCraftBlockData == null) cachedCraftBlockData = CraftBlockData.createData(this);
+        return (CraftBlockData) cachedCraftBlockData.clone();
+    }
+    // Paper end
+}