Trying to copy and paste chests.

I made a plugin where a wand selects a region and copies all the blocks in the region. For some reason, when it copies chests, the items inside are all zeroed when pasted. I broke the chest before I pasted the selection.

Code:

public class BlockClipboard {

    private ArrayList<SavedBlockInfo> blockList;

    public void addBlock(Block block) {
        if (block.getState() instanceof InventoryHolder) {
            InventoryHolder invHolder = (InventoryHolder) block.getState();
            blockList.add(new SavedBlockInfo(block, block.getType(), block.getData(), block.getState(), invHolder.getInventory(), invHolder.getInventory().getContents()));
        }
        else {
            blockList.add(new SavedBlockInfo(block, block.getType(), block.getData(), block.getState()));
        }
    }
}

Code:

public class SavedBlockInfo {
   
    private Block block;
    private Material material;
    private byte blockData;
    private BlockState blockState;
    private MaterialData materialData;
    private Inventory blockInventory;
    private ItemStack[] itemStack;
    private boolean isContainer;
   
    //Regular Block
    public SavedBlockInfo(Block block, Material material, byte blockData, BlockState blockState) {
        this.block = block;
        this.material = material;
        this.blockData = blockData;
        this.blockState = blockState;
    }
   
    //container
    public SavedBlockInfo(Block block, Material material, byte blockData, BlockState blockState, Inventory blockInventory, ItemStack[] itemStack) {
        this.block = block;
        this.material = material;
        this.blockData = blockData;
        this.blockState = blockState;
        this.blockInventory = blockInventory;
        this.itemStack = itemStack;
        this.isContainer = true;
    }
}

I also noticed, that when I break the chest and read the contents of that broken chest, nothing is there. It should be saved in the SavedBlockInfo class in the itemStack field.

I finally figured it out. It is apparently a bug. I had to clone each individual ItemStack and put it into a new ItemStack array.

Code:

 private ItemStack[] cloneItemStack(ItemStack[] input) {
 ItemStack[] newItemStack = new ItemStack[input.length];
 int i = 0;
 for (ItemStack itemstack : input) {
 if (itemstack != null) {
 newItemStack[i] = itemstack.clone();
 }
 i++;
 }
 return newItemStack;
 }

EDIT by Moderator: merged posts, please use the edit button instead of double posting.