ItemDeserializer: throw a more specific exception on unknown items

src/data/bedrock/item/ItemDeserializer.php

@@ -30,6 +30,7 @@ use pocketmine\block\utils\TreeType;
 use pocketmine\block\VanillaBlocks as Blocks;
 use pocketmine\data\bedrock\block\BlockStateDeserializeException;
 use pocketmine\data\bedrock\block\BlockStateDeserializer;
+use pocketmine\data\bedrock\block\convert\UnsupportedBlockStateException;
 use pocketmine\data\bedrock\CompoundTypeIds;
 use pocketmine\data\bedrock\DyeColorIdMap;
 use pocketmine\data\bedrock\EntityLegacyIds;
@@ -71,6 +72,8 @@ final class ItemDeserializer{
 			//TODO: this is rough duct tape; we need a better way to deal with this
 			try{
 				$block = $this->blockStateDeserializer->deserialize($blockData);
+			}catch(UnsupportedBlockStateException $e){
+				throw new UnsupportedItemTypeException($e->getMessage(), 0, $e);
 			}catch(BlockStateDeserializeException $e){
 				throw new ItemTypeDeserializeException("Failed to deserialize item data: " . $e->getMessage(), 0, $e);
 			}
@@ -80,7 +83,7 @@ final class ItemDeserializer{
 		}
 		$id = $data->getName();
 		if(!isset($this->deserializers[$id])){
-			throw new ItemTypeDeserializeException("No deserializer found for ID $id");
+			throw new UnsupportedItemTypeException("No deserializer found for ID $id");
 		}
 
 		return ($this->deserializers[$id])($data);

src/data/bedrock/item/ItemTypeDeserializeException.php

@@ -23,6 +23,6 @@ declare(strict_types=1);
 
 namespace pocketmine\data\bedrock\item;
 
-final class ItemTypeDeserializeException extends \RuntimeException{
+class ItemTypeDeserializeException extends \RuntimeException{
 
 }

src/data/bedrock/item/UnsupportedItemTypeException.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\data\bedrock\item;
+
+final class UnsupportedItemTypeException extends ItemTypeDeserializeException{
+
+}