private void placeLiquid(Block block, boolean water) {
    if (block.getType() == Material.AIR || block.getType() == Material.CAVE_AIR || block.getType() == Material.VOID_AIR) {
        block.setType(water ? Material.WATER : Material.LAVA);
    }
    else {
        if (water && block.getBlockData() instanceof Waterlogged) {
            Waterlogged wl = (Waterlogged) block.getBlockData();
            wl.setWaterlogged(true);
            block.setBlockData(wl, false);
            block.getWorld().playSound(block.getLocation(), Sound.ENTITY_PLAYER_SPLASH, 1F, 1F);
            return;
        }

        if (BlockStorage.hasBlockInfo(block)) {
            BlockStorage.clearBlockInfo(block);
        }
    }

    runPostTask(block, water ? Sound.ENTITY_PLAYER_SPLASH : Sound.BLOCK_LAVA_POP, 1);
}
 

/**
 * This method checks whether a given {@link Material} array contains any {@link Material}
 * that would result in a {@link Waterlogged} {@link BlockData}.
 * This is done to save performance, so we don't have to validate {@link BlockData} at
 * runtime.
 * 
 * @param materials
 *            The {@link Material} Array to check
 * 
 * @return Whether the array contained any {@link Waterlogged} materials
 */
private boolean containsWaterlogged(Material[] materials) {
    if (SlimefunPlugin.getMinecraftVersion() == MinecraftVersion.UNIT_TEST) {
        // BlockData is not available to us during Unit Tests :/
        return false;
    }

    for (Material type : materials) {
        // This BlockData is purely virtual and only created on startup, it should have
        // no impact on performance, in fact it should save performance as it preloads
        // the data but also saves heavy calls for non-waterlogged Materials
        if (type.createBlockData() instanceof Waterlogged) {
            return true;
        }
    }

    return false;
}
 

@Override
public void tick(Block b, SlimefunItem item, Config data) {
    if (b.getType() == Material.AIR) {
        // The block was broken, setting the Material now would result in a
        // duplication glitch
        return;
    }

    if (waterlogged) {
        BlockData blockData = b.getBlockData();
        b.setType(material, true);

        if (blockData instanceof Waterlogged && ((Waterlogged) blockData).isWaterlogged()) {
            Waterlogged block = (Waterlogged) b.getBlockData();
            block.setWaterlogged(true);
            b.setBlockData(block);
        }
    }
    else {
        b.setType(material, false);
    }
}
 

private void pasteTree(ChunkPopulateEvent e, int x, int z, Tree tree) {
    for (int y = e.getWorld().getMaxHeight(); y > 30; y--) {
        Block current = e.getWorld().getBlockAt(x, y, z);
        if (!current.getType().isSolid() && current.getType() != Material.WATER && current.getType() != Material.SEAGRASS && current.getType() != Material.TALL_SEAGRASS && !(current.getBlockData() instanceof Waterlogged && ((Waterlogged) current.getBlockData()).isWaterlogged()) && tree.isSoil(current.getRelative(0, -1, 0).getType()) && isFlat(current)) {
            Schematic.pasteSchematic(new Location(e.getWorld(), x, y, z), tree);
            break;
        }
    }
}
 

/**
 * Create a shop use Shop and Info object.
 *
 * @param shop The shop object
 * @param info The info object
 */
public void createShop(@NotNull Shop shop, @NotNull Info info) {
    Player player = Bukkit.getPlayer(shop.getOwner());
    if (player == null) {
        throw new IllegalStateException("The owner creating the shop is offline or not exist");
    }
    ShopCreateEvent shopCreateEvent = new ShopCreateEvent(shop, player);
    if (Util.fireCancellableEvent(shopCreateEvent)) {
        Util.debugLog("Cancelled by plugin");
        return;
    }
    if (info.getSignBlock() != null && autoSign) {
        if (Util.isAir(info.getSignBlock().getType()) || info.getSignBlock().getType() == Material.WATER) {
            info.getSignBlock().setType(Util.getSignMaterial());
            BlockState bs = info.getSignBlock().getState();
            if (info.getSignBlock().getType() == Material.WATER && (bs.getBlockData() instanceof Waterlogged)) {
                Waterlogged waterable = (Waterlogged) bs.getBlockData();
                waterable.setWaterlogged(true); // Looks like sign directly put in water
            }
            if (bs.getBlockData() instanceof WallSign) {
                WallSign signBlockDataType = (WallSign) bs.getBlockData();
                BlockFace bf = info.getLocation().getBlock().getFace(info.getSignBlock());
                if (bf != null) {
                    signBlockDataType.setFacing(bf);
                    bs.setBlockData(signBlockDataType);
                }
            } else {
                plugin.getLogger().warning("Sign material " + bs.getType().name() + " not a WallSign, make sure you using correct sign material.");
            }
            bs.update(true);
        } else {
            if (!plugin.getConfig().getBoolean("shop.allow-shop-without-space-for-sign")) {
                MsgUtil.sendMessage(player, MsgUtil.getMessage("failed-to-put-sign", player));
                Util.debugLog("Sign cannot placed cause no enough space(Not air block)");
                return;
            }
        }
    }
    //load the shop finally
    shop.onLoad();
    //first init
    shop.setSignText();
    //sync add to prevent compete issue
    addShop(shop.getLocation().getWorld().getName(), shop);
    //save to database
    plugin.getDatabaseHelper().createShop(
            shop,
            null,
            e -> Bukkit.getScheduler().runTask(plugin, () -> {
                //also remove from memory when failed
                shop.delete(true);
                plugin.getLogger().warning("Shop create failed, trying to auto fix the database...");
                boolean backupSuccess = Util.backupDatabase();
                if (backupSuccess) {
                    plugin.getDatabaseHelper().removeShop(shop);
                } else {
                    plugin.getLogger().warning("Failed to backup the database, all changes will revert after a reboot.");
                }
            }));
}