SPIGOT-2679: Add meta for StructureBlock

src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java

@@ -304,6 +304,8 @@ public class CraftBlock implements Block {
             return new CraftBanner(this);
         case FLOWER_POT:
             return new CraftFlowerPot(this);
+        case STRUCTURE_BLOCK:
+            return new CraftStructureBlock(this);
         default:
             return new CraftBlockState(this);
         }

src/main/java/org/bukkit/craftbukkit/block/CraftStructureBlock.java

@@ -0,0 +1,23 @@
+package org.bukkit.craftbukkit.block;
+
+import net.minecraft.server.TileEntityStructure;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.craftbukkit.CraftWorld;
+
+public class CraftStructureBlock extends CraftBlockState {
+
+    private final TileEntityStructure structure;
+
+    public CraftStructureBlock(Block block) {
+        super(block);
+
+        this.structure = (TileEntityStructure) ((CraftWorld) block.getWorld()).getTileEntityAt(getX(), getY(), getZ());
+    }
+
+    public CraftStructureBlock(Material material, TileEntityStructure structure) {
+        super(material);
+
+        this.structure = structure;
+    }
+}

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java

@@ -113,6 +113,7 @@ public final class CraftItemFactory implements ItemFactory {
         case REDSTONE_COMPARATOR:
         case FLOWER_POT_ITEM:
         case SHIELD:
+        case STRUCTURE_BLOCK:
             return new CraftMetaBlockState(meta, material);
         default:
             return new CraftMetaItem(meta);

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java

@@ -374,6 +374,7 @@ public final class CraftItemStack extends ItemStack {
             case REDSTONE_COMPARATOR:
             case FLOWER_POT_ITEM:
             case SHIELD:
+            case STRUCTURE_BLOCK:
                 return new CraftMetaBlockState(item.getTag(), CraftMagicNumbers.getMaterial(item.getItem()));
             default:
                 return new CraftMetaItem(item.getTag());

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBlockState.java

@@ -4,7 +4,6 @@ import com.google.common.base.Objects;
 import com.google.common.collect.ImmutableMap;
 import java.util.Map;
 import net.minecraft.server.BlockJukeBox;
-import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.NBTBase;
 import net.minecraft.server.NBTTagCompound;
 import net.minecraft.server.TileEntity;
@@ -23,6 +22,7 @@ import net.minecraft.server.TileEntityMobSpawner;
 import net.minecraft.server.TileEntityNote;
 import net.minecraft.server.TileEntitySign;
 import net.minecraft.server.TileEntitySkull;
+import net.minecraft.server.TileEntityStructure;
 import org.apache.commons.lang.Validate;
 import org.bukkit.Material;
 import org.bukkit.block.BlockState;
@@ -44,6 +44,7 @@ import org.bukkit.craftbukkit.block.CraftJukebox;
 import org.bukkit.craftbukkit.block.CraftNoteBlock;
 import org.bukkit.craftbukkit.block.CraftSign;
 import org.bukkit.craftbukkit.block.CraftSkull;
+import org.bukkit.craftbukkit.block.CraftStructureBlock;
 import org.bukkit.inventory.meta.BlockStateMeta;
 
 @DelegateDeserialization(CraftMetaItem.SerializableMeta.class)
@@ -179,6 +180,7 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
             case REDSTONE_COMPARATOR:
             case FLOWER_POT_ITEM:
             case SHIELD:
+            case STRUCTURE_BLOCK:
                 return true;
         }
         return false;
@@ -286,6 +288,11 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
                 te = new TileEntityFlowerPot();
             }
             return new CraftFlowerPot(material, (TileEntityFlowerPot) te);
+        case STRUCTURE_BLOCK:
+            if (te == null) {
+                te = new TileEntityStructure();
+            }
+            return new CraftStructureBlock(material, (TileEntityStructure) te);
         default:
             throw new IllegalStateException("Missing blockState for " + material);
         }
@@ -356,6 +363,9 @@ public class CraftMetaBlockState extends CraftMetaItem implements BlockStateMeta
         case FLOWER_POT_ITEM:
             valid = te instanceof TileEntityFlowerPot;
             break;
+        case STRUCTURE_BLOCK:
+            valid = te instanceof TileEntityStructure;
+            break;
         default:
             valid = false;
             break;