Item Serializer

public class ItemSerialization {
   public static String toBase64(Inventory inventory) {
       ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
       DataOutputStream dataOutput = new DataOutputStream(outputStream);
       NBTTagList itemList = new NBTTagList();

       // Save every element in the list
       for (int i = 0; i < inventory.getSize(); i++) {
           NBTTagCompound outputObject = new NBTTagCompound();
           CraftItemStack craft = getCraftVersion(inventory.getItem(i));

           // Convert the item stack to a NBT compound
           if (craft != null)
               CraftItemStack.asNMSCopy(craft).save(outputObject);
           itemList.add(outputObject);
       }

       // Now save the list
       NBTBase.a(itemList, dataOutput);

       // Serialize that array
       return Base64Coder.encodeLines(outputStream.toByteArray());
   }

   public static Inventory fromBase64(String data) {
       ByteArrayInputStream inputStream = new ByteArrayInputStream(Base64Coder.decodeLines(data));
       NBTTagList itemList = (NBTTagList) NBTBase.b(new DataInputStream(inputStream));
       Inventory inventory = new CraftInventoryCustom(null, itemList.size());

       for (int i = 0; i < itemList.size(); i++) {
           NBTTagCompound inputObject = (NBTTagCompound) itemList.get(i);

           if (!inputObject.isEmpty()) {
               inventory.setItem(i, CraftItemStack.asCraftMirror(
                   net.minecraft.server.v1_5_R2.ItemStack.createStack(inputObject)));
           }
       }

       // Serialize that array
       return inventory;
   }

   private static CraftItemStack getCraftVersion(ItemStack stack) {
       if (stack instanceof CraftItemStack)
           return (CraftItemStack) stack;
       else if (stack != null)
           return CraftItemStack.asCraftCopy(stack);
       else
           return null;
   }
}