Updating for latest PocketMine-NBT changes

composer.lock

@@ -372,12 +372,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/pmmp/NBT.git",
-                "reference": "cb170cf827e265cfb492de2af684cba23574dfec"
+                "reference": "772f627884c92beb750cc1c50a8d25f155a9c006"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/pmmp/NBT/zipball/cb170cf827e265cfb492de2af684cba23574dfec",
+                "url": "https://api.github.com/repos/pmmp/NBT/zipball/772f627884c92beb750cc1c50a8d25f155a9c006",
-                "reference": "cb170cf827e265cfb492de2af684cba23574dfec",
+                "reference": "772f627884c92beb750cc1c50a8d25f155a9c006",
                 "shasum": ""
             },
             "require": {
@@ -405,7 +405,7 @@
                 "source": "https://github.com/pmmp/NBT/tree/master",
                 "issues": "https://github.com/pmmp/NBT/issues"
             },
-            "time": "2019-03-16T12:12:20+00:00"
+            "time": "2019-03-18T14:38:07+00:00"
         },
         {
             "name": "pocketmine/raklib",

src/pocketmine/Player.php

@@ -1826,10 +1826,10 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 			//TODO: old code had a TODO for SpawnForced
 
 		}elseif($spawnReset){
-			$namedtag->setTag(new ListTag("Pos", [
+			$namedtag->setTag("Pos", new ListTag([
-				new DoubleTag("", $spawn->x),
+				new DoubleTag($spawn->x),
-				new DoubleTag("", $spawn->y),
+				new DoubleTag($spawn->y),
-				new DoubleTag("", $spawn->z)
+				new DoubleTag($spawn->z)
 			]));
 		}
 
@@ -1882,9 +1882,9 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		$this->achievements = [];
 		$achievements = $nbt->getCompoundTag("Achievements");
 		if($achievements !== null){
-			/** @var ByteTag $achievement */
+			/** @var ByteTag $tag */
-			foreach($achievements as $achievement){
+			foreach($achievements as $name => $tag){
-				$this->achievements[$achievement->getName()] = $achievement->getValue() !== 0;
+				$this->achievements[$name] = $tag->getValue() !== 0;
 			}
 		}
 
@@ -2897,19 +2897,19 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 
 			if(!$this->isAlive()){
 				//hack for respawn after quit
-				$nbt->setTag(new ListTag("Pos", [
+				$nbt->setTag("Pos", new ListTag([
-					new DoubleTag("", $this->spawnPosition->x),
+					new DoubleTag($this->spawnPosition->x),
-					new DoubleTag("", $this->spawnPosition->y),
+					new DoubleTag($this->spawnPosition->y),
-					new DoubleTag("", $this->spawnPosition->z)
+					new DoubleTag($this->spawnPosition->z)
 				]));
 			}
 		}
 
-		$achievements = new CompoundTag("Achievements");
+		$achievements = new CompoundTag();
 		foreach($this->achievements as $achievement => $status){
 			$achievements->setByte($achievement, $status ? 1 : 0);
 		}
-		$nbt->setTag($achievements);
+		$nbt->setTag("Achievements", $achievements);
 
 		$nbt->setInt("playerGameType", $this->gamemode);
 		$nbt->setLong("firstPlayed", $this->firstPlayed);

src/pocketmine/Server.php

@@ -61,6 +61,7 @@ use pocketmine\metadata\PlayerMetadataStore;
 use pocketmine\nbt\BigEndianNbtSerializer;
 use pocketmine\nbt\NbtDataException;
 use pocketmine\nbt\tag\CompoundTag;
+use pocketmine\nbt\TreeRoot;
 use pocketmine\network\AdvancedNetworkInterface;
 use pocketmine\network\mcpe\CompressBatchPromise;
 use pocketmine\network\mcpe\CompressBatchTask;
@@ -645,7 +646,7 @@ class Server{
 
 		if(file_exists($path . "$name.dat")){
 			try{
-				return (new BigEndianNbtSerializer())->readCompressed(file_get_contents($path . "$name.dat"));
+				return (new BigEndianNbtSerializer())->readCompressed(file_get_contents($path . "$name.dat"))->getTag();
 			}catch(NbtDataException $e){ //zlib decode error / corrupt data
 				rename($path . "$name.dat", $path . "$name.dat.bak");
 				$this->logger->error($this->getLanguage()->translateString("pocketmine.data.playerCorrupted", [$name]));
@@ -667,7 +668,7 @@ class Server{
 		if(!$ev->isCancelled()){
 			$nbt = new BigEndianNbtSerializer();
 			try{
-				file_put_contents($this->getDataPath() . "players/" . strtolower($name) . ".dat", $nbt->writeCompressed($ev->getSaveData()));
+				file_put_contents($this->getDataPath() . "players/" . strtolower($name) . ".dat", $nbt->writeCompressed(new TreeRoot($ev->getSaveData())));
 			}catch(\ErrorException $e){
 				$this->logger->critical($this->getLanguage()->translateString("pocketmine.data.saveError", [$name, $e->getMessage()]));
 				$this->logger->logException($e);

src/pocketmine/entity/Entity.php

@@ -715,7 +715,7 @@ abstract class Entity extends Location implements Metadatable, EntityIds{
 	}
 
 	public function saveNBT() : CompoundTag{
-		$nbt = new CompoundTag("");
+		$nbt = new CompoundTag();
 		if(!($this instanceof Player)){
 			$nbt->setString("id", EntityFactory::getSaveId(get_class($this)));
 
@@ -725,21 +725,21 @@ abstract class Entity extends Location implements Metadatable, EntityIds{
 			}
 		}
 
-		$nbt->setTag(new ListTag("Pos", [
+		$nbt->setTag("Pos", new ListTag([
-			new DoubleTag("", $this->x),
+			new DoubleTag($this->x),
-			new DoubleTag("", $this->y),
+			new DoubleTag($this->y),
-			new DoubleTag("", $this->z)
+			new DoubleTag($this->z)
 		]));
 
-		$nbt->setTag(new ListTag("Motion", [
+		$nbt->setTag("Motion", new ListTag([
-			new DoubleTag("", $this->motion->x),
+			new DoubleTag($this->motion->x),
-			new DoubleTag("", $this->motion->y),
+			new DoubleTag($this->motion->y),
-			new DoubleTag("", $this->motion->z)
+			new DoubleTag($this->motion->z)
 		]));
 
-		$nbt->setTag(new ListTag("Rotation", [
+		$nbt->setTag("Rotation", new ListTag([
-			new FloatTag("", $this->yaw),
+			new FloatTag($this->yaw),
-			new FloatTag("", $this->pitch)
+			new FloatTag($this->pitch)
 		]));
 
 		$nbt->setFloat("FallDistance", $this->fallDistance);

src/pocketmine/entity/EntityFactory.php

@@ -246,21 +246,20 @@ final class EntityFactory{
 	 * @return CompoundTag
 	 */
 	public static function createBaseNBT(Vector3 $pos, ?Vector3 $motion = null, float $yaw = 0.0, float $pitch = 0.0) : CompoundTag{
-		return new CompoundTag("", [
+		return CompoundTag::create()
-			new ListTag("Pos", [
+			->setTag("Pos", new ListTag([
-				new DoubleTag("", $pos->x),
+				new DoubleTag($pos->x),
-				new DoubleTag("", $pos->y),
+				new DoubleTag($pos->y),
-				new DoubleTag("", $pos->z)
+				new DoubleTag($pos->z)
-			]),
+			]))
-			new ListTag("Motion", [
+			->setTag("Motion", new ListTag([
-				new DoubleTag("", $motion ? $motion->x : 0.0),
+				new DoubleTag($motion ? $motion->x : 0.0),
-				new DoubleTag("", $motion ? $motion->y : 0.0),
+				new DoubleTag($motion ? $motion->y : 0.0),
-				new DoubleTag("", $motion ? $motion->z : 0.0)
+				new DoubleTag($motion ? $motion->z : 0.0)
-			]),
+			]))
-			new ListTag("Rotation", [
+			->setTag("Rotation", new ListTag([
-				new FloatTag("", $yaw),
+				new FloatTag($yaw),
-				new FloatTag("", $pitch)
+				new FloatTag($pitch)
-			])
+			]));
-		]);
 	}
 }

src/pocketmine/entity/Human.php

@@ -800,8 +800,8 @@ class Human extends Creature implements ProjectileSource, InventoryHolder{
 		$nbt->setInt("XpTotal", $this->totalXp);
 		$nbt->setInt("XpSeed", $this->xpSeed);
 
-		$inventoryTag = new ListTag("Inventory", [], NBT::TAG_Compound);
+		$inventoryTag = new ListTag([], NBT::TAG_Compound);
-		$nbt->setTag($inventoryTag);
+		$nbt->setTag("Inventory", $inventoryTag);
 		if($this->inventory !== null){
 			//Normal inventory
 			$slotCount = $this->inventory->getSize() + $this->inventory->getHotbarSize();
@@ -835,17 +835,17 @@ class Human extends Creature implements ProjectileSource, InventoryHolder{
 				}
 			}
 
-			$nbt->setTag(new ListTag("EnderChestInventory", $items, NBT::TAG_Compound));
+			$nbt->setTag("EnderChestInventory", new ListTag($items, NBT::TAG_Compound));
 		}
 
 		if($this->skin !== null){
-			$nbt->setTag(new CompoundTag("Skin", [
+			$nbt->setTag("Skin", CompoundTag::create()
-				new StringTag("Name", $this->skin->getSkinId()),
+				->setString("Name", $this->skin->getSkinId())
-				new ByteArrayTag("Data", $this->skin->getSkinData()),
+				->setByteArray("Data", $this->skin->getSkinData())
-				new ByteArrayTag("CapeData", $this->skin->getCapeData()),
+				->setByteArray("CapeData", $this->skin->getCapeData())
-				new StringTag("GeometryName", $this->skin->getGeometryName()),
+				->setString("GeometryName", $this->skin->getGeometryName())
-				new ByteArrayTag("GeometryData", $this->skin->getGeometryData())
+				->setByteArray("GeometryData", $this->skin->getGeometryData())
-			]));
+			);
 		}
 
 		return $nbt;

src/pocketmine/entity/Living.php

@@ -42,10 +42,8 @@ use pocketmine\item\enchantment\Enchantment;
 use pocketmine\item\Item;
 use pocketmine\math\Vector3;
 use pocketmine\math\VoxelRayTrace;
-use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\FloatTag;
-use pocketmine\nbt\tag\IntTag;
 use pocketmine\nbt\tag\ListTag;
 use pocketmine\network\mcpe\protocol\EntityEventPacket;
 use pocketmine\network\mcpe\protocol\LevelSoundEventPacket;
@@ -178,16 +176,15 @@ abstract class Living extends Entity implements Damageable{
 		if(count($this->effects) > 0){
 			$effects = [];
 			foreach($this->effects as $effect){
-				$effects[] = new CompoundTag("", [
+				$effects[] = CompoundTag::create()
-					new ByteTag("Id", $effect->getId()),
+					->setByte("Id", $effect->getId())
-					new ByteTag("Amplifier", Binary::signByte($effect->getAmplifier())),
+					->setByte("Amplifier", Binary::signByte($effect->getAmplifier()))
-					new IntTag("Duration", $effect->getDuration()),
+					->setInt("Duration", $effect->getDuration())
-					new ByteTag("Ambient", $effect->isAmbient() ? 1 : 0),
+					->setByte("Ambient", $effect->isAmbient() ? 1 : 0)
-					new ByteTag("ShowParticles", $effect->isVisible() ? 1 : 0)
+					->setByte("ShowParticles", $effect->isVisible() ? 1 : 0);
-				]);
 			}
 
-			$nbt->setTag(new ListTag("ActiveEffects", $effects));
+			$nbt->setTag("ActiveEffects", new ListTag($effects));
 		}
 
 		return $nbt;

src/pocketmine/entity/object/ItemEntity.php

@@ -134,7 +134,7 @@ class ItemEntity extends Entity{
 
 	public function saveNBT() : CompoundTag{
 		$nbt = parent::saveNBT();
-		$nbt->setTag($this->item->nbtSerialize(-1, "Item"));
+		$nbt->setTag("Item", $this->item->nbtSerialize());
 		$nbt->setShort("Health", (int) $this->getHealth());
 		if($this->despawnDelay === self::NEVER_DESPAWN){
 			$age = -32768;

src/pocketmine/item/Banner.php

@@ -29,9 +29,7 @@ use pocketmine\block\BlockFactory;
 use pocketmine\block\utils\BannerPattern;
 use pocketmine\block\utils\DyeColor;
 use pocketmine\nbt\tag\CompoundTag;
-use pocketmine\nbt\tag\IntTag;
 use pocketmine\nbt\tag\ListTag;
-use pocketmine\nbt\tag\StringTag;
 use pocketmine\tile\Banner as TileBanner;
 
 class Banner extends Item{
@@ -81,15 +79,15 @@ class Banner extends Item{
 	 * @param Deque|BannerPattern[] $patterns
 	 */
 	public function setPatterns(Deque $patterns) : void{
-		$tag = new ListTag(self::TAG_PATTERNS);
+		$tag = new ListTag();
 		/** @var BannerPattern $pattern */
 		foreach($patterns as $pattern){
-			$tag->push(new CompoundTag("", [
+			$tag->push(CompoundTag::create()
-				new StringTag(self::TAG_PATTERN_NAME, $pattern->getId()),
+				->setString(self::TAG_PATTERN_NAME, $pattern->getId())
-				new IntTag(self::TAG_PATTERN_COLOR, $pattern->getColor()->getInvertedMagicNumber())
+				->setInt(self::TAG_PATTERN_COLOR, $pattern->getColor()->getInvertedMagicNumber())
-			]));
+			);
 		}
-		$this->getNamedTag()->setTag($tag);
+		$this->getNamedTag()->setTag(self::TAG_PATTERNS, $tag);
 	}
 
 	public function getFuelTime() : int{

src/pocketmine/item/Item.php

@@ -36,11 +36,11 @@ use pocketmine\math\Vector3;
 use pocketmine\nbt\LittleEndianNbtSerializer;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\NbtDataException;
-use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\ListTag;
 use pocketmine\nbt\tag\ShortTag;
 use pocketmine\nbt\tag\StringTag;
+use pocketmine\nbt\TreeRoot;
 use pocketmine\Player;
 use pocketmine\utils\Binary;
 use function array_map;
@@ -199,10 +199,7 @@ class Item implements ItemIds, \JsonSerializable{
 	 * @return Item
 	 */
 	public function setCustomBlockData(CompoundTag $compound) : Item{
-		$tags = clone $compound;
+		$this->getNamedTag()->setTag(self::TAG_BLOCK_ENTITY_TAG, clone $compound);
-		$tags->setName(self::TAG_BLOCK_ENTITY_TAG);
-		$this->getNamedTag()->setTag($tags);
-
 		return $this;
 	}
 
@@ -311,15 +308,15 @@ class Item implements ItemIds, \JsonSerializable{
 
 		$ench = $this->getNamedTag()->getListTag(self::TAG_ENCH);
 		if(!($ench instanceof ListTag)){
-			$ench = new ListTag(self::TAG_ENCH, [], NBT::TAG_Compound);
+			$ench = new ListTag([], NBT::TAG_Compound);
 		}else{
 			/** @var CompoundTag $entry */
 			foreach($ench as $k => $entry){
 				if($entry->getShort("id") === $enchantment->getId()){
-					$ench->set($k, new CompoundTag("", [
+					$ench->set($k, CompoundTag::create()
-						new ShortTag("id", $enchantment->getId()),
+						->setShort("id", $enchantment->getId())
-						new ShortTag("lvl", $enchantment->getLevel())
+						->setShort("lvl", $enchantment->getLevel())
-					]));
+					);
 					$found = true;
 					break;
 				}
@@ -327,13 +324,13 @@ class Item implements ItemIds, \JsonSerializable{
 		}
 
 		if(!$found){
-			$ench->push(new CompoundTag("", [
+			$ench->push(CompoundTag::create()
-				new ShortTag("id", $enchantment->getId()),
+				->setShort("id", $enchantment->getId())
-				new ShortTag("lvl", $enchantment->getLevel())
+				->setShort("lvl", $enchantment->getLevel())
-			]));
+			);
 		}
 
-		$this->getNamedTag()->setTag($ench);
+		$this->getNamedTag()->setTag(self::TAG_ENCH, $ench);
 
 		return $this;
 	}
@@ -418,12 +415,12 @@ class Item implements ItemIds, \JsonSerializable{
 
 		/** @var CompoundTag $display */
 		$display = $this->getNamedTag()->getCompoundTag(self::TAG_DISPLAY);
-		if(!($display instanceof CompoundTag)){
+		if($display === null){
-			$display = new CompoundTag(self::TAG_DISPLAY);
+			$display = new CompoundTag();
 		}
 
 		$display->setString(self::TAG_DISPLAY_NAME, $name);
-		$this->getNamedTag()->setTag($display);
+		$this->getNamedTag()->setTag(self::TAG_DISPLAY, $display);
 
 		return $this;
 	}
@@ -439,7 +436,7 @@ class Item implements ItemIds, \JsonSerializable{
 			if($display->getCount() === 0){
 				$this->getNamedTag()->removeTag(self::TAG_DISPLAY);
 			}else{
-				$this->getNamedTag()->setTag($display);
+				$this->getNamedTag()->setTag(self::TAG_DISPLAY, $display);
 			}
 		}
 
@@ -466,14 +463,14 @@ class Item implements ItemIds, \JsonSerializable{
 	public function setLore(array $lines) : Item{
 		$display = $this->getNamedTag()->getCompoundTag(self::TAG_DISPLAY);
 		if(!($display instanceof CompoundTag)){
-			$display = new CompoundTag(self::TAG_DISPLAY, []);
+			$display = new CompoundTag();
 		}
 
-		$display->setTag(new ListTag(self::TAG_DISPLAY_LORE, array_map(function(string $str) : StringTag{
+		$display->setTag(self::TAG_DISPLAY_LORE, new ListTag(array_map(function(string $str) : StringTag{
-			return new StringTag("", $str);
+			return new StringTag($str);
 		}, $lines), NBT::TAG_String));
 
-		$this->getNamedTag()->setTag($display);
+		$this->getNamedTag()->setTag(self::TAG_DISPLAY, $display);
 
 		return $this;
 	}
@@ -493,7 +490,7 @@ class Item implements ItemIds, \JsonSerializable{
 	 * @return CompoundTag
 	 */
 	public function getNamedTag() : CompoundTag{
-		return $this->nbt ?? ($this->nbt = new CompoundTag(""));
+		return $this->nbt ?? ($this->nbt = new CompoundTag());
 	}
 
 	/**
@@ -790,7 +787,7 @@ class Item implements ItemIds, \JsonSerializable{
 	 * @return string
 	 */
 	final public function __toString() : string{
-		return "Item " . $this->name . " (" . $this->id . ":" . ($this->hasAnyDamageValue() ? "?" : $this->getMeta()) . ")x" . $this->count . ($this->hasNamedTag() ? " tags:" . base64_encode((new LittleEndianNbtSerializer())->write($this->nbt)) : "");
+		return "Item " . $this->name . " (" . $this->id . ":" . ($this->hasAnyDamageValue() ? "?" : $this->getMeta()) . ")x" . $this->count . ($this->hasNamedTag() ? " tags:" . base64_encode((new LittleEndianNbtSerializer())->write(new TreeRoot($this->nbt))) : "");
 	}
 
 	/**
@@ -812,7 +809,7 @@ class Item implements ItemIds, \JsonSerializable{
 		}
 
 		if($this->hasNamedTag()){
-			$data["nbt_b64"] = base64_encode((new LittleEndianNbtSerializer())->write($this->getNamedTag()));
+			$data["nbt_b64"] = base64_encode((new LittleEndianNbtSerializer())->write(new TreeRoot($this->getNamedTag())));
 		}
 
 		return $data;
@@ -839,7 +836,7 @@ class Item implements ItemIds, \JsonSerializable{
 			$nbt = base64_decode($data["nbt_b64"], true);
 		}
 		return ItemFactory::get(
-			(int) $data["id"], (int) ($data["damage"] ?? 0), (int) ($data["count"] ?? 1), $nbt !== "" ? (new LittleEndianNbtSerializer())->read($nbt) : null
+			(int) $data["id"], (int) ($data["damage"] ?? 0), (int) ($data["count"] ?? 1), $nbt !== "" ? (new LittleEndianNbtSerializer())->read($nbt)->getTag() : null
 		);
 	}
 
@@ -847,21 +844,17 @@ class Item implements ItemIds, \JsonSerializable{
 	 * Serializes the item to an NBT CompoundTag
 	 *
 	 * @param int $slot optional, the inventory slot of the item
-	 * @param string $tagName the name to assign to the CompoundTag object
 	 *
 	 * @return CompoundTag
 	 */
-	public function nbtSerialize(int $slot = -1, string $tagName = "") : CompoundTag{
+	public function nbtSerialize(int $slot = -1) : CompoundTag{
-		$result = new CompoundTag($tagName, [
+		$result = CompoundTag::create()
-			new ShortTag("id", $this->id),
+			->setShort("id", $this->id)
-			new ByteTag("Count", Binary::signByte($this->count)),
+			->setByte("Count", Binary::signByte($this->count))
-			new ShortTag("Damage", $this->getMeta())
+			->setShort("Damage", $this->getMeta());
-		]);
 
 		if($this->hasNamedTag()){
-			$itemNBT = clone $this->getNamedTag();
+			$result->setTag("tag", clone $this->getNamedTag());
-			$itemNBT->setName("tag");
-			$result->setTag($itemNBT);
 		}
 
 		if($slot !== -1){
@@ -902,11 +895,8 @@ class Item implements ItemIds, \JsonSerializable{
 		}
 
 		$itemNBT = $tag->getCompoundTag("tag");
-		if($itemNBT instanceof CompoundTag){
+		if($itemNBT !== null){
-			/** @var CompoundTag $t */
+			$item->setNamedTag(clone $itemNBT);
-			$t = clone $itemNBT;
-			$t->setName("");
-			$item->setNamedTag($t);
 		}
 
 		return $item;

src/pocketmine/item/WritableBook.php

@@ -26,7 +26,6 @@ namespace pocketmine\item;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\ListTag;
-use pocketmine\nbt\tag\StringTag;
 
 class WritableBook extends Item{
 
@@ -91,7 +90,7 @@ class WritableBook extends Item{
 		$page = $pagesTag->get($pageId);
 		$page->setString(self::TAG_PAGE_TEXT, $pageText);
 
-		$this->getNamedTag()->setTag($pagesTag);
+		$this->getNamedTag()->setTag(self::TAG_PAGES, $pagesTag);
 
 		return $created;
 	}
@@ -110,13 +109,13 @@ class WritableBook extends Item{
 		$pagesTag = $this->getPagesTag();
 
 		for($current = $pagesTag->count(); $current <= $pageId; $current++){
-			$pagesTag->push(new CompoundTag("", [
+			$pagesTag->push(CompoundTag::create()
-				new StringTag(self::TAG_PAGE_TEXT, ""),
+				->setString(self::TAG_PAGE_TEXT, "")
-				new StringTag(self::TAG_PAGE_PHOTONAME, "")
+				->setString(self::TAG_PAGE_PHOTONAME, "")
-			]));
+			);
 		}
 
-		$this->getNamedTag()->setTag($pagesTag);
+		$this->getNamedTag()->setTag(self::TAG_PAGES, $pagesTag);
 	}
 
 	/**
@@ -144,12 +143,12 @@ class WritableBook extends Item{
 	public function insertPage(int $pageId, string $pageText = "") : bool{
 		$pagesTag = $this->getPagesTag();
 
-		$pagesTag->insert($pageId, new CompoundTag("", [
+		$pagesTag->insert($pageId, CompoundTag::create()
-			new StringTag(self::TAG_PAGE_TEXT, $pageText),
+			->setString(self::TAG_PAGE_TEXT, $pageText)
-			new StringTag(self::TAG_PAGE_PHOTONAME, "")
+			->setString(self::TAG_PAGE_PHOTONAME, "")
-		]));
+		);
 
-		$this->getNamedTag()->setTag($pagesTag);
+		$this->getNamedTag()->setTag(self::TAG_PAGES, $pagesTag);
 
 		return true;
 	}
@@ -194,7 +193,7 @@ class WritableBook extends Item{
 	}
 
 	protected function getPagesTag() : ListTag{
-		return $this->getNamedTag()->getListTag(self::TAG_PAGES) ?? new ListTag(self::TAG_PAGES, [], NBT::TAG_Compound);
+		return $this->getNamedTag()->getListTag(self::TAG_PAGES) ?? new ListTag([], NBT::TAG_Compound);
 	}
 
 	/**
@@ -203,7 +202,7 @@ class WritableBook extends Item{
 	 */
 	public function setPages(array $pages) : void{
 		$nbt = $this->getNamedTag();
-		$nbt->setTag(new ListTag(self::TAG_PAGES, $pages, NBT::TAG_Compound));
+		$nbt->setTag(self::TAG_PAGES, new ListTag($pages, NBT::TAG_Compound));
 		$this->setNamedTag($nbt);
 	}
 }

src/pocketmine/level/Level.php

@@ -1630,22 +1630,21 @@ class Level implements ChunkManager, Metadatable{
 	 * @return ItemEntity|null
 	 */
 	public function dropItem(Vector3 $source, Item $item, ?Vector3 $motion = null, int $delay = 10) : ?ItemEntity{
-		$motion = $motion ?? new Vector3(lcg_value() * 0.2 - 0.1, 0.2, lcg_value() * 0.2 - 0.1);
+		if($item->isNull()){
-		$itemTag = $item->nbtSerialize();
+			return null;
-		$itemTag->setName("Item");
+		}
 
-		if(!$item->isNull()){
+		$motion = $motion ?? new Vector3(lcg_value() * 0.2 - 0.1, 0.2, lcg_value() * 0.2 - 0.1);
 		$nbt = EntityFactory::createBaseNBT($source, $motion, lcg_value() * 360, 0);
 		$nbt->setShort("Health", 5);
 		$nbt->setShort("PickupDelay", $delay);
-			$nbt->setTag($itemTag);
+		$nbt->setTag("Item", $item->nbtSerialize());
 
 		/** @var ItemEntity $itemEntity */
 		$itemEntity = EntityFactory::create(ItemEntity::class, $this, $nbt);
 		$itemEntity->spawnToAll();
 		return $itemEntity;
-		}
+
-		return null;
 	}
 
 	/**

src/pocketmine/level/format/io/data/BedrockLevelData.php

@@ -29,12 +29,10 @@ use pocketmine\level\generator\Generator;
 use pocketmine\level\generator\GeneratorManager;
 use pocketmine\level\Level;
 use pocketmine\nbt\LittleEndianNbtSerializer;
-use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
-use pocketmine\nbt\tag\FloatTag;
 use pocketmine\nbt\tag\IntTag;
-use pocketmine\nbt\tag\LongTag;
 use pocketmine\nbt\tag\StringTag;
+use pocketmine\nbt\TreeRoot;
 use pocketmine\network\mcpe\protocol\ProtocolInfo;
 use pocketmine\utils\Binary;
 use pocketmine\utils\Utils;
@@ -63,51 +61,50 @@ class BedrockLevelData extends BaseNbtLevelData{
 			//TODO: add support for limited worlds
 		}
 
-		$levelData = new CompoundTag("", [
+		$levelData = CompoundTag::create()
 			//Vanilla fields
-			new IntTag("DayCycleStopTime", -1),
+			->setInt("DayCycleStopTime", -1)
-			new IntTag("Difficulty", Level::getDifficultyFromString((string) ($options["difficulty"] ?? "normal"))),
+			->setInt("Difficulty", Level::getDifficultyFromString((string) ($options["difficulty"] ?? "normal")))
-			new ByteTag("ForceGameType", 0),
+			->setByte("ForceGameType", 0)
-			new IntTag("GameType", 0),
+			->setInt("GameType", 0)
-			new IntTag("Generator", $generatorType),
+			->setInt("Generator", $generatorType)
-			new LongTag("LastPlayed", time()),
+			->setLong("LastPlayed", time())
-			new StringTag("LevelName", $name),
+			->setString("LevelName", $name)
-			new IntTag("NetworkVersion", ProtocolInfo::CURRENT_PROTOCOL),
+			->setInt("NetworkVersion", ProtocolInfo::CURRENT_PROTOCOL)
-			//new IntTag("Platform", 2), //TODO: find out what the possible values are for
+			//->setInt("Platform", 2) //TODO: find out what the possible values are for
-			new LongTag("RandomSeed", $seed),
+			->setLong("RandomSeed", $seed)
-			new IntTag("SpawnX", 0),
+			->setInt("SpawnX", 0)
-			new IntTag("SpawnY", 32767),
+			->setInt("SpawnY", 32767)
-			new IntTag("SpawnZ", 0),
+			->setInt("SpawnZ", 0)
-			new IntTag("StorageVersion", self::CURRENT_STORAGE_VERSION),
+			->setInt("StorageVersion", self::CURRENT_STORAGE_VERSION)
-			new LongTag("Time", 0),
+			->setLong("Time", 0)
-			new ByteTag("eduLevel", 0),
+			->setByte("eduLevel", 0)
-			new ByteTag("falldamage", 1),
+			->setByte("falldamage", 1)
-			new ByteTag("firedamage", 1),
+			->setByte("firedamage", 1)
-			new ByteTag("hasBeenLoadedInCreative", 1), //badly named, this actually determines whether achievements can be earned in this world...
+			->setByte("hasBeenLoadedInCreative", 1) //badly named, this actually determines whether achievements can be earned in this world...
-			new ByteTag("immutableWorld", 0),
+			->setByte("immutableWorld", 0)
-			new FloatTag("lightningLevel", 0.0),
+			->setFloat("lightningLevel", 0.0)
-			new IntTag("lightningTime", 0),
+			->setInt("lightningTime", 0)
-			new ByteTag("pvp", 1),
+			->setByte("pvp", 1)
-			new FloatTag("rainLevel", 0.0),
+			->setFloat("rainLevel", 0.0)
-			new IntTag("rainTime", 0),
+			->setInt("rainTime", 0)
-			new ByteTag("spawnMobs", 1),
+			->setByte("spawnMobs", 1)
-			new ByteTag("texturePacksRequired", 0), //TODO
+			->setByte("texturePacksRequired", 0) //TODO
 
 			//Additional PocketMine-MP fields
-			new CompoundTag("GameRules", []),
+			->setTag("GameRules", new CompoundTag())
-			new ByteTag("hardcore", ($options["hardcore"] ?? false) === true ? 1 : 0),
+			->setByte("hardcore", ($options["hardcore"] ?? false) === true ? 1 : 0)
-			new StringTag("generatorName", GeneratorManager::getGeneratorName($generator)),
+			->setString("generatorName", GeneratorManager::getGeneratorName($generator))
-			new StringTag("generatorOptions", $options["preset"] ?? "")
+			->setString("generatorOptions", $options["preset"] ?? "");
-		]);
 
 		$nbt = new LittleEndianNbtSerializer();
-		$buffer = $nbt->write($levelData);
+		$buffer = $nbt->write(new TreeRoot($levelData));
 		file_put_contents($path . "level.dat", Binary::writeLInt(self::CURRENT_STORAGE_VERSION) . Binary::writeLInt(strlen($buffer)) . $buffer);
 	}
 
 	protected function load() : ?CompoundTag{
 		$nbt = new LittleEndianNbtSerializer();
-		$levelData = $nbt->read(substr(file_get_contents($this->dataPath), 8));
+		$levelData = $nbt->read(substr(file_get_contents($this->dataPath), 8))->getTag();
 
 		$version = $levelData->getInt("StorageVersion", INT32_MAX, true);
 		if($version > self::CURRENT_STORAGE_VERSION){
@@ -152,7 +149,7 @@ class BedrockLevelData extends BaseNbtLevelData{
 		$this->compoundTag->setInt("StorageVersion", self::CURRENT_STORAGE_VERSION);
 
 		$nbt = new LittleEndianNbtSerializer();
-		$buffer = $nbt->write($this->compoundTag);
+		$buffer = $nbt->write(new TreeRoot($this->compoundTag));
 		file_put_contents($this->dataPath, Binary::writeLInt(self::CURRENT_STORAGE_VERSION) . Binary::writeLInt(strlen($buffer)) . $buffer);
 	}
 

src/pocketmine/level/format/io/data/JavaLevelData.php

@@ -27,12 +27,10 @@ use pocketmine\level\generator\Generator;
 use pocketmine\level\generator\GeneratorManager;
 use pocketmine\level\Level;
 use pocketmine\nbt\BigEndianNbtSerializer;
-use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\FloatTag;
-use pocketmine\nbt\tag\IntTag;
-use pocketmine\nbt\tag\LongTag;
 use pocketmine\nbt\tag\StringTag;
+use pocketmine\nbt\TreeRoot;
 use pocketmine\utils\Utils;
 use function ceil;
 use function file_get_contents;
@@ -44,36 +42,34 @@ class JavaLevelData extends BaseNbtLevelData{
 	public static function generate(string $path, string $name, int $seed, string $generator, array $options = [], int $version = 19133) : void{
 		Utils::testValidInstance($generator, Generator::class);
 		//TODO, add extra details
-		$levelData = new CompoundTag("Data", [
+		$levelData = CompoundTag::create()
-			new ByteTag("hardcore", ($options["hardcore"] ?? false) === true ? 1 : 0),
+			->setByte("hardcore", ($options["hardcore"] ?? false) === true ? 1 : 0)
-			new ByteTag("Difficulty", Level::getDifficultyFromString((string) ($options["difficulty"] ?? "normal"))),
+			->setByte("Difficulty", Level::getDifficultyFromString((string) ($options["difficulty"] ?? "normal")))
-			new ByteTag("initialized", 1),
+			->setByte("initialized", 1)
-			new IntTag("GameType", 0),
+			->setInt("GameType", 0)
-			new IntTag("generatorVersion", 1), //2 in MCPE
+			->setInt("generatorVersion", 1) //2 in MCPE
-			new IntTag("SpawnX", 256),
+			->setInt("SpawnX", 256)
-			new IntTag("SpawnY", 70),
+			->setInt("SpawnY", 70)
-			new IntTag("SpawnZ", 256),
+			->setInt("SpawnZ", 256)
-			new IntTag("version", $version),
+			->setInt("version", $version)
-			new IntTag("DayTime", 0),
+			->setInt("DayTime", 0)
-			new LongTag("LastPlayed", (int) (microtime(true) * 1000)),
+			->setLong("LastPlayed", (int) (microtime(true) * 1000))
-			new LongTag("RandomSeed", $seed),
+			->setLong("RandomSeed", $seed)
-			new LongTag("SizeOnDisk", 0),
+			->setLong("SizeOnDisk", 0)
-			new LongTag("Time", 0),
+			->setLong("Time", 0)
-			new StringTag("generatorName", GeneratorManager::getGeneratorName($generator)),
+			->setString("generatorName", GeneratorManager::getGeneratorName($generator))
-			new StringTag("generatorOptions", $options["preset"] ?? ""),
+			->setString("generatorOptions", $options["preset"] ?? "")
-			new StringTag("LevelName", $name),
+			->setString("LevelName", $name)
-			new CompoundTag("GameRules", [])
+			->setTag("GameRules", new CompoundTag());
-		]);
+
 		$nbt = new BigEndianNbtSerializer();
-		$buffer = $nbt->writeCompressed(new CompoundTag("", [
+		$buffer = $nbt->writeCompressed(new TreeRoot(CompoundTag::create()->setTag("Data", $levelData)));
-			$levelData
-		]));
 		file_put_contents($path . "level.dat", $buffer);
 	}
 
 	protected function load() : ?CompoundTag{
 		$nbt = new BigEndianNbtSerializer();
-		$levelData = $nbt->readCompressed(file_get_contents($this->dataPath));
+		$levelData = $nbt->readCompressed(file_get_contents($this->dataPath))->getTag();
 		if($levelData->hasTag("Data", CompoundTag::class)){
 			return $levelData->getCompoundTag("Data");
 		}
@@ -94,10 +90,7 @@ class JavaLevelData extends BaseNbtLevelData{
 
 	public function save() : void{
 		$nbt = new BigEndianNbtSerializer();
-		$this->compoundTag->setName("Data");
+		$buffer = $nbt->writeCompressed(new TreeRoot(CompoundTag::create()->setTag("Data", $this->compoundTag)));
-		$buffer = $nbt->writeCompressed(new CompoundTag("", [
-			$this->compoundTag
-		]));
 		file_put_contents($this->dataPath, $buffer);
 	}
 

src/pocketmine/level/format/io/leveldb/LevelDB.php

@@ -40,14 +40,13 @@ use pocketmine\level\generator\Generator;
 use pocketmine\nbt\LittleEndianNbtSerializer;
 use pocketmine\nbt\NbtDataException;
 use pocketmine\nbt\tag\CompoundTag;
-use pocketmine\nbt\tag\IntTag;
+use pocketmine\nbt\TreeRoot;
-use pocketmine\nbt\tag\ShortTag;
-use pocketmine\nbt\tag\StringTag;
 use pocketmine\utils\Binary;
 use pocketmine\utils\BinaryDataException;
 use pocketmine\utils\BinaryStream;
 use pocketmine\utils\Utils;
 use function array_flip;
+use function array_map;
 use function array_values;
 use function chr;
 use function count;
@@ -159,7 +158,7 @@ class LevelDB extends BaseLevelProvider implements WritableLevelProvider{
 		$palette = [];
 		for($i = 0, $paletteSize = $stream->getLInt(); $i < $paletteSize; ++$i){
 			$offset = $stream->getOffset();
-			$tag = $nbt->read($stream->getBuffer(), $offset);
+			$tag = $nbt->read($stream->getBuffer(), $offset)->getTag();
 			$stream->setOffset($offset);
 
 			$id = $stringToLegacyId[$tag->getString("name")] ?? BlockIds::INFO_UPDATE;
@@ -303,7 +302,7 @@ class LevelDB extends BaseLevelProvider implements WritableLevelProvider{
 		$entities = [];
 		if(($entityData = $this->db->get($index . self::TAG_ENTITY)) !== false and $entityData !== ""){
 			try{
-				$entities = $nbt->readMultiple($entityData);
+				$entities = array_map(function(TreeRoot $root) : CompoundTag{ return $root->getTag(); }, $nbt->readMultiple($entityData));
 			}catch(NbtDataException $e){
 				throw new CorruptedChunkException($e->getMessage(), 0, $e);
 			}
@@ -313,7 +312,7 @@ class LevelDB extends BaseLevelProvider implements WritableLevelProvider{
 		$tiles = [];
 		if(($tileData = $this->db->get($index . self::TAG_BLOCK_ENTITY)) !== false and $tileData !== ""){
 			try{
-				$tiles = $nbt->readMultiple($tileData);
+				$tiles = array_map(function(TreeRoot $root) : CompoundTag{ return $root->getTag(); }, $nbt->readMultiple($tileData));
 			}catch(NbtDataException $e){
 				throw new CorruptedChunkException($e->getMessage(), 0, $e);
 			}
@@ -379,11 +378,10 @@ class LevelDB extends BaseLevelProvider implements WritableLevelProvider{
 					$subStream->putLInt(count($palette));
 					$tags = [];
 					foreach($palette as $p){
-						$tags[] = new CompoundTag("", [
+						$tags[] = new TreeRoot(CompoundTag::create()
-							new StringTag("name", $idMap[$p >> 4] ?? "minecraft:info_update"),
+							->setString("name", $idMap[$p >> 4] ?? "minecraft:info_update")
-							new IntTag("oldid", $p >> 4), //PM only (debugging), vanilla doesn't have this
+							->setInt("oldid", $p >> 4) //PM only (debugging), vanilla doesn't have this
-							new ShortTag("val", $p & 0xf)
+							->setShort("val", $p & 0xf));
-						]);
 					}
 
 					$subStream->put((new LittleEndianNbtSerializer())->writeMultiple($tags));
@@ -415,7 +413,7 @@ class LevelDB extends BaseLevelProvider implements WritableLevelProvider{
 	private function writeTags(array $targets, string $index, \LevelDBWriteBatch $write) : void{
 		if(!empty($targets)){
 			$nbt = new LittleEndianNbtSerializer();
-			$write->put($index, $nbt->writeMultiple($targets));
+			$write->put($index, $nbt->writeMultiple(array_map(function(CompoundTag $tag) : TreeRoot{ return new TreeRoot($tag); }, $targets)));
 		}else{
 			$write->delete($index);
 		}

src/pocketmine/level/format/io/region/LegacyAnvilChunkTrait.php

@@ -59,7 +59,7 @@ trait LegacyAnvilChunkTrait{
 	protected function deserializeChunk(string $data) : Chunk{
 		$nbt = new BigEndianNbtSerializer();
 		try{
-			$chunk = $nbt->readCompressed($data);
+			$chunk = $nbt->readCompressed($data)->getTag();
 		}catch(NbtDataException $e){
 			throw new CorruptedChunkException($e->getMessage(), 0, $e);
 		}

src/pocketmine/level/format/io/region/McRegion.php

@@ -56,7 +56,7 @@ class McRegion extends RegionLevelProvider{
 	protected function deserializeChunk(string $data) : Chunk{
 		$nbt = new BigEndianNbtSerializer();
 		try{
-			$chunk = $nbt->readCompressed($data);
+			$chunk = $nbt->readCompressed($data)->getTag();
 		}catch(NbtDataException $e){
 			throw new CorruptedChunkException($e->getMessage(), 0, $e);
 		}

src/pocketmine/network/mcpe/NetworkBinaryStream.php

@@ -31,6 +31,8 @@ use pocketmine\item\Item;
 use pocketmine\item\ItemFactory;
 use pocketmine\item\ItemIds;
 use pocketmine\math\Vector3;
+use pocketmine\nbt\tag\CompoundTag;
+use pocketmine\nbt\TreeRoot;
 use pocketmine\network\BadPacketException;
 use pocketmine\network\mcpe\protocol\types\CommandOriginData;
 use pocketmine\network\mcpe\protocol\types\EntityLink;
@@ -96,13 +98,14 @@ class NetworkBinaryStream extends BinaryStream{
 		$cnt = $auxValue & 0xff;
 
 		$nbtLen = $this->getLShort();
+		/** @var CompoundTag|null $compound */
 		$compound = null;
 		if($nbtLen === 0xffff){
 			$c = $this->getByte();
 			if($c !== 1){
 				throw new BadPacketException("Unexpected NBT count $c");
 			}
-			$compound = (new NetworkNbtSerializer())->read($this->buffer, $this->offset);
+			$compound = (new NetworkNbtSerializer())->read($this->buffer, $this->offset)->getTag();
 		}elseif($nbtLen !== 0){
 			throw new BadPacketException("Unexpected fake NBT length $nbtLen");
 		}
@@ -143,7 +146,7 @@ class NetworkBinaryStream extends BinaryStream{
 		if($item->hasNamedTag()){
 			$this->putLShort(0xffff);
 			$this->putByte(1); //TODO: some kind of count field? always 1 as of 1.9.0
-			$this->put((new NetworkNbtSerializer())->write($item->getNamedTag()));
+			$this->put((new NetworkNbtSerializer())->write(new TreeRoot($item->getNamedTag())));
 		}else{
 			$this->putLShort(0);
 		}

src/pocketmine/network/mcpe/handler/SimpleSessionHandler.php

@@ -398,7 +398,7 @@ class SimpleSessionHandler extends SessionHandler{
 
 		$block = $this->player->getLevel()->getBlock($pos);
 		try{
-			$nbt = (new NetworkNbtSerializer())->read($packet->namedtag);
+			$nbt = (new NetworkNbtSerializer())->read($packet->namedtag)->getTag();
 		}catch(NbtDataException $e){
 			throw new BadPacketException($e->getMessage(), 0, $e);
 		}

src/pocketmine/tile/Banner.php

@@ -31,7 +31,6 @@ use pocketmine\math\Vector3;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\IntTag;
 use pocketmine\nbt\tag\ListTag;
-use pocketmine\nbt\tag\StringTag;
 
 /**
  * @deprecated
@@ -72,26 +71,26 @@ class Banner extends Spawnable{
 
 	protected function writeSaveData(CompoundTag $nbt) : void{
 		$nbt->setInt(self::TAG_BASE, $this->baseColor->getInvertedMagicNumber());
-		$patterns = new ListTag(self::TAG_PATTERNS);
+		$patterns = new ListTag();
 		foreach($this->patterns as $pattern){
-			$patterns->push(new CompoundTag("", [
+			$patterns->push(CompoundTag::create()
-				new StringTag(self::TAG_PATTERN_NAME, $pattern->getId()),
+				->setString(self::TAG_PATTERN_NAME, $pattern->getId())
-				new IntTag(self::TAG_PATTERN_COLOR, $pattern->getColor()->getInvertedMagicNumber())
+				->setInt(self::TAG_PATTERN_COLOR, $pattern->getColor()->getInvertedMagicNumber())
-			]));
+			);
 		}
-		$nbt->setTag($patterns);
+		$nbt->setTag(self::TAG_PATTERNS, $patterns);
 	}
 
 	protected function addAdditionalSpawnData(CompoundTag $nbt) : void{
 		$nbt->setInt(self::TAG_BASE, $this->baseColor->getInvertedMagicNumber());
-		$patterns = new ListTag(self::TAG_PATTERNS);
+		$patterns = new ListTag();
 		foreach($this->patterns as $pattern){
-			$patterns->push(new CompoundTag("", [
+			$patterns->push(CompoundTag::create()
-				new StringTag(self::TAG_PATTERN_NAME, $pattern->getId()),
+				->setString(self::TAG_PATTERN_NAME, $pattern->getId())
-				new IntTag(self::TAG_PATTERN_COLOR, $pattern->getColor()->getInvertedMagicNumber())
+				->setInt(self::TAG_PATTERN_COLOR, $pattern->getColor()->getInvertedMagicNumber())
-			]));
+			);
 		}
-		$nbt->setTag($patterns);
+		$nbt->setTag(self::TAG_PATTERNS, $patterns);
 	}
 
 	/**

src/pocketmine/tile/ContainerTrait.php

@@ -69,7 +69,7 @@ trait ContainerTrait{
 			$items[] = $item->nbtSerialize($slot);
 		}
 
-		$tag->setTag(new ListTag(Container::TAG_ITEMS, $items, NBT::TAG_Compound));
+		$tag->setTag(Container::TAG_ITEMS, new ListTag($items, NBT::TAG_Compound));
 
 		if($this->lock !== null){
 			$tag->setString(Container::TAG_LOCK, $this->lock);

src/pocketmine/tile/ItemFrame.php

@@ -61,7 +61,7 @@ class ItemFrame extends Spawnable{
 	protected function writeSaveData(CompoundTag $nbt) : void{
 		$nbt->setFloat(self::TAG_ITEM_DROP_CHANCE, $this->itemDropChance);
 		$nbt->setByte(self::TAG_ITEM_ROTATION, $this->itemRotation);
-		$nbt->setTag($this->item->nbtSerialize(-1, self::TAG_ITEM));
+		$nbt->setTag(self::TAG_ITEM, $this->item->nbtSerialize());
 	}
 
 	public function hasItem() : bool{
@@ -102,6 +102,6 @@ class ItemFrame extends Spawnable{
 	protected function addAdditionalSpawnData(CompoundTag $nbt) : void{
 		$nbt->setFloat(self::TAG_ITEM_DROP_CHANCE, $this->itemDropChance);
 		$nbt->setByte(self::TAG_ITEM_ROTATION, $this->itemRotation);
-		$nbt->setTag($this->item->nbtSerialize(-1, self::TAG_ITEM));
+		$nbt->setTag(self::TAG_ITEM, $this->item->nbtSerialize());
 	}
 }

src/pocketmine/tile/Spawnable.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\tile;
 
 use pocketmine\nbt\tag\CompoundTag;
-use pocketmine\nbt\tag\IntTag;
+use pocketmine\nbt\TreeRoot;
-use pocketmine\nbt\tag\StringTag;
 use pocketmine\network\mcpe\NetworkNbtSerializer;
 use function get_class;
 
@@ -76,7 +75,7 @@ abstract class Spawnable extends Tile{
 				self::$nbtWriter = new NetworkNbtSerializer();
 			}
 
-			$this->spawnCompoundCache = self::$nbtWriter->write($this->getSpawnCompound());
+			$this->spawnCompoundCache = self::$nbtWriter->write(new TreeRoot($this->getSpawnCompound()));
 		}
 
 		return $this->spawnCompoundCache;
@@ -86,12 +85,11 @@ abstract class Spawnable extends Tile{
 	 * @return CompoundTag
 	 */
 	final public function getSpawnCompound() : CompoundTag{
-		$nbt = new CompoundTag("", [
+		$nbt = CompoundTag::create()
-			new StringTag(self::TAG_ID, TileFactory::getSaveId(get_class($this))), //TODO: disassociate network ID from save ID
+			->setString(self::TAG_ID, TileFactory::getSaveId(get_class($this))) //TODO: disassociate network ID from save ID
-			new IntTag(self::TAG_X, $this->x),
+			->setInt(self::TAG_X, $this->x)
-			new IntTag(self::TAG_Y, $this->y),
+			->setInt(self::TAG_Y, $this->y)
-			new IntTag(self::TAG_Z, $this->z)
+			->setInt(self::TAG_Z, $this->z);
-		]);
 		$this->addAdditionalSpawnData($nbt);
 		return $nbt;
 	}

src/pocketmine/tile/Tile.php

@@ -72,18 +72,18 @@ abstract class Tile extends Position{
 	abstract protected function writeSaveData(CompoundTag $nbt) : void;
 
 	public function saveNBT() : CompoundTag{
-		$nbt = new CompoundTag("");
+		$nbt = CompoundTag::create()
-		$nbt->setString(self::TAG_ID, TileFactory::getSaveId(get_class($this)));
+			->setString(self::TAG_ID, TileFactory::getSaveId(get_class($this)))
-		$nbt->setInt(self::TAG_X, $this->x);
+			->setInt(self::TAG_X, $this->x)
-		$nbt->setInt(self::TAG_Y, $this->y);
+			->setInt(self::TAG_Y, $this->y)
-		$nbt->setInt(self::TAG_Z, $this->z);
+			->setInt(self::TAG_Z, $this->z);
 		$this->writeSaveData($nbt);
 
 		return $nbt;
 	}
 
 	public function getCleanedNBT() : ?CompoundTag{
-		$this->writeSaveData($tag = new CompoundTag(""));
+		$this->writeSaveData($tag = new CompoundTag());
 		return $tag->getCount() > 0 ? $tag : null;
 	}