How do I store blocks in a variable and paste them for later?

I am creating a minigame plugin that has arenas, and each arena has build regions. The build regions are supposed to copy all the blocks, and then when the minigame is over, I need to restore those blocks.

People have suggested resetting the world by copying and pasting, but my minigame plugin is supposed to handle multiple games in the same world. I also was suggested to use the WorldEdit API, but the documentation is for WorldEdit 7.0, which does not work on 1.8.8.

I wrote my own code, but I'm stuck at copying the chest's contents.

EDIT: Copying the blocks and the chest's inventory worked, but when I ran the "paste" command, all the blocks were there, but when I opened the chest, the items were there, but they had zeros in front. How do I fix this?

This is only part of my BlockClipboard object.

Code:

public class BlockClipboard {

    private ArrayList<Block> blockList;
    private ArrayList<Material> materialList;
    private ArrayList<BlockState> blockStates;
    private ArrayList<Byte> blockData;
    private ArrayList<MaterialData> materialDatas;
    private ArrayList<Inventory> blockInventories;
  
    public BlockClipboard() {
        blockList = new ArrayList<Block>();
        materialList = new ArrayList<Material>();
        blockStates = new ArrayList<BlockState>();
        blockData = new ArrayList<Byte>();
        materialDatas = new ArrayList<MaterialData>();
        blockInventories = new ArrayList<Inventory>();
    }
  
    public void addBlock(Block block) {
        for (int i = 0; i < blockList.size(); i++) {
            if (getBlock(i).getLocation().getBlockX() == block.getLocation().getBlockX() && getBlock(i).getLocation().getBlockY() == block.getLocation().getBlockY() && getBlock(i).getLocation().getBlockZ() == block.getLocation().getBlockZ()) {
                blockList.set(i, block);
                materialList.set(i, block.getType());
                blockStates.set(i, block.getState());
                blockData.set(i, block.getData());
                if (block.getState() instanceof InventoryHolder) {
                    InventoryHolder container = (InventoryHolder) block.getState();
                    blockInventories.set(i, container.getInventory());
                  
                }
                else {
                    blockInventories.set(i, null);
                }
                return;
            }
        }
        blockList.add(block);
        materialList.add(block.getType());
        blockStates.add(block.getState());
        blockData.add(block.getData());
        if (block.getState() instanceof InventoryHolder) {
            InventoryHolder container = (InventoryHolder) block.getState();
            blockInventories.add(container.getInventory());
        }
        else {
            blockInventories.add(null);
        }
    }

This is the code that handles the command to copy and paste.

Code:

            else if (args[0].equalsIgnoreCase("addcopy")) {
                if (protectedBlocks == null) {
                    protectedBlocks = new BlockClipboard();
                }
                if (!protectedBlocks.getBlockList().isEmpty()) {
                    sender.sendMessage("Clipboard was not empty");
                }
                for (int x = Math.min(wallsTool.getPos1().getBlockX(), wallsTool.getPos2().getBlockX()); x <= Math.max(wallsTool.getPos1().getBlockX(), wallsTool.getPos2().getBlockX()); x++) {
                    for (int y = Math.min(wallsTool.getPos1().getBlockY(), wallsTool.getPos2().getBlockY()); y <= Math.max(wallsTool.getPos1().getBlockY(), wallsTool.getPos2().getBlockY()); y++) {
                        for (int z = Math.min(wallsTool.getPos1().getBlockZ(), wallsTool.getPos2().getBlockZ()); z <= Math.max(wallsTool.getPos1().getBlockZ(), wallsTool.getPos2().getBlockZ()); z++) {
                            Location loc = new Location(wallsTool.getWorld(), x, y, z);
                            sender.sendMessage(loc.toString());
                            protectedBlocks.addBlock(loc.getBlock());
                        }
                    }
                }
                sender.sendMessage("copied");
            }
            else if (args[0].equalsIgnoreCase("paste")) {
                for (int i = 0; i < protectedBlocks.getBlockList().size(); i++) {
                    protectedBlocks.getBlock(i).setType(protectedBlocks.getMaterial(i));
                    protectedBlocks.getBlock(i).setData(protectedBlocks.getBlockData(i));
                    if (protectedBlocks.getBlock(i).getState() instanceof InventoryHolder) {
                        InventoryHolder protectedContainer = (InventoryHolder) protectedBlocks.getBlock(i).getState();
                        protectedContainer.getInventory().setContents(protectedBlocks.getInventory(i).getContents());
                    }

                }
                sender.sendMessage("pasted");
            }
            else if (args[0].equalsIgnoreCase("listcopy")) {
                if (protectedBlocks == null || protectedBlocks.getBlockList().size() == 0) {
                    sender.sendMessage("nothing");
                }
                else {
                    for (int i = 0; i < protectedBlocks.getBlockList().size(); i++) {
                        sender.sendMessage(protectedBlocks.getBlock(i).toString());
                        sender.sendMessage(protectedBlocks.getBlock(i).getState().toString());
                    }
                }
            }
            else if (args[0].equalsIgnoreCase("clear")) {
                if (protectedBlocks == null || protectedBlocks.getBlockList().size() == 0) {
                    sender.sendMessage("Empty");
                }
                else {
                    protectedBlocks.clear();
                    sender.sendMessage("cleared.");
                }
            }

 

Simply stating that you're stuck on inventories can only help direct us to a problem so much. Would you mind explaining what you expect to happen and what result is happening instead?

 

Sorry I didn't explain it clearly enough. Copying the blocks and the chest's inventory worked, but when I ran the "paste" command, all the blocks were there, but when I opened the chest, the items were there, but they had zeros in front.

Click Here for what I mean by zeros.

 

You need to save the inventory and when do /paste load the inventory inside the chest, if i well interpetraded you no need to save permanently so you can use an hashmap and save the inventory in to.

Example:

Code:

HashMap<UUID, List<ItemStack>> items = new HashMap<UUID, List<ItemStack>>();

and after you put all of itemStack in the inventory

 

Code:

protectedContainer.getInventory().setContents(protectedBlocks.getInventory(i).getContents());

Doesn't this code already load the inventory into the chest?