public class UndoChest extends UndoBlock {

	private ItemStack[] is;

	public UndoChest(BlockState state) {
		super(state);
		ItemStack[] tmp = ((InventoryHolder) state).getInventory().getContents();
		for (ItemStack id : tmp) {
			if (id != null)
				Util.info("Type: " + id.getType().name() + "  Amount: " + id.getAmount());
		}
		final int len = tmp.length;
		this.is = new ItemStack[len];
		for (int i = 0; i < len; i++) {
			is[i] = tmp[i] == null ? null : tmp[i].clone();
		}
		for (ItemStack id : is) {
			if (id != null)
				Util.info("Type: " + id.getType().name() + "  Amount: " + id.getAmount());
		}
	}

	@Override
	public void undo() {
		if (is != null && state != null) {
			state.update(true);
			for (ItemStack id : is) {
				if (id != null)
					Util.info("Type: " + id.getType().name() + "  Amount: " + id.getAmount());
			}
			Inventory inv2 = ((InventoryHolder) state.getBlock().getState()).getInventory();
			inv2.setContents(is);
		}
	}
}