org.bukkit.persistence.PersistentDataContainer#has ( )源码实例Demo

@Override
public boolean test(ItemStack itemStack) {
    Objects.requireNonNull(itemStack, "itemStack");

    if (!itemStack.hasItemMeta()) {
        return false;
    }

    PersistentDataContainer container = itemStack.getItemMeta().getPersistentDataContainer();
    if (container.has(this.potionKey, PersistentDataType.BYTE)) {
        Byte value = container.get(this.potionKey, PersistentDataType.BYTE);
        return value != null && value == TRUE;
    }

    return false;
}
 

@EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
public void onPlayerItemConsume(PlayerItemConsumeEvent event) {
    ItemStack item = event.getItem();
    if (!this.test(item)) {
        return;
    }

    PersistentDataContainer container = item.getItemMeta().getPersistentDataContainer();

    int durationSeconds = 0;
    if (container.has(this.durationSecondsKey, PersistentDataType.INTEGER)) {
        durationSeconds = container.getOrDefault(this.durationSecondsKey, PersistentDataType.INTEGER, 0);
    } else if (container.has(this.durationKey, PersistentDataType.INTEGER)) {
        durationSeconds = (int) TimeUnit.MINUTES.toSeconds(container.getOrDefault(this.durationKey, PersistentDataType.INTEGER, 0)); // legacy
    }

    if (durationSeconds <= 0) {
        return;
    }

    Player player = event.getPlayer();
    this.effect.setEffect(player, durationSeconds);
    this.broadcastConsumption(player, durationSeconds);
}
 

void tick(Player player) {
    Objects.requireNonNull(player, "player");

    PersistentDataContainer container = player.getPersistentDataContainer();
    if (!container.has(secondsLeftKey, PersistentDataType.INTEGER)) {
        return;
    }

    Integer secondsLeft = container.getOrDefault(secondsLeftKey, PersistentDataType.INTEGER, 0);
    if (secondsLeft > 0) {
        container.set(secondsLeftKey, PersistentDataType.INTEGER, --secondsLeft);
    } else {
        container.remove(initialSecondsKey);
        container.remove(secondsLeftKey);
    }
}
 

/**
 * @param stack
 * @param hash
 */
public static void hashIntoInvisibleString(ItemStack stack, String hash) {
	ItemMeta meta = stack.getItemMeta();
	try {
		NamespacedKey key = new NamespacedKey((Plugin) BedwarsAPI.getInstance(), BEDWARS_NAMESPACED_KEY);
		PersistentDataContainer container = meta.getPersistentDataContainer();
		List<String> propertyLines = new ArrayList<>();
		if (container.has(key, PersistentDataType.STRING)) {
			String oldString = container.get(key, PersistentDataType.STRING);
			propertyLines.addAll((List<String>) new Gson().fromJson(oldString, List.class));
		}
		propertyLines.add(hash);
		container.set(key, PersistentDataType.STRING, new Gson().toJson(propertyLines));
	} catch (Throwable ignored) {
		// Use the Lore API instead
		List<String> lore = meta.hasLore() ? meta.getLore() : new ArrayList<>();

		lore.add(convertToInvisibleString(hash));
		meta.setLore(lore);
	}
	stack.setItemMeta(meta);
}
 

/**
 * @param stack
 * @param hash
 */
public static void hashIntoInvisibleString(ItemStack stack, String hash) {
	ItemMeta meta = stack.getItemMeta();
	try {
		NamespacedKey key = new NamespacedKey((Plugin) BedwarsAPI.getInstance(), BEDWARS_NAMESPACED_KEY);
		PersistentDataContainer container = meta.getPersistentDataContainer();
		List<String> propertyLines = new ArrayList<>();
		if (container.has(key, PersistentDataType.STRING)) {
			String oldString = container.get(key, PersistentDataType.STRING);
			propertyLines.addAll((List<String>) new Gson().fromJson(oldString, List.class));
		}
		propertyLines.add(hash);
		container.set(key, PersistentDataType.STRING, new Gson().toJson(propertyLines));
	} catch (Throwable ignored) {
		// Use the Lore API instead
		List<String> lore = meta.hasLore() ? meta.getLore() : new ArrayList<>();

		lore.add(convertToInvisibleString(hash));
		meta.setLore(lore);
	}
	stack.setItemMeta(meta);
}
 

public static <T, Z> boolean hasTag(@NotNull ItemStack item, @NotNull String key, PersistentDataType<T, Z> dataType, boolean useMinecraft) {
    ItemMeta meta = item.getItemMeta();
    if (meta == null) return false;
    PersistentDataContainer container = meta.getPersistentDataContainer();

    return container.has((useMinecraft ? NamespacedKey.minecraft(key) : new NamespacedKey(MineTinker.getPlugin(), key)), dataType);
}
 

/**
 * This method checks whether the given {@link ItemStack} is considered {@link Soulbound}.
 * 
 * @param item
 *            The {@link ItemStack} to check for
 * @return Whether the given item is soulbound
 */
public static boolean isSoulbound(ItemStack item) {
    if (item == null || item.getType() == Material.AIR) {
        return false;
    }
    else {
        ItemMeta meta = item.hasItemMeta() ? item.getItemMeta() : null;

        if (meta != null && SlimefunPlugin.getMinecraftVersion().isAtLeast(MinecraftVersion.MINECRAFT_1_14)) {
            PersistentDataContainer container = meta.getPersistentDataContainer();

            if (container.has(SOULBOUND_KEY, PersistentDataType.BYTE)) {
                return true;
            }
        }

        if (SlimefunPlugin.getThirdPartySupportService().isEmeraldEnchantsInstalled()) {
            // We wanna operate on a copy now
            item = item.clone();

            for (ItemEnchantment enchantment : EmeraldEnchants.getInstance().getRegistry().getEnchantments(item)) {
                EmeraldEnchants.getInstance().getRegistry().applyEnchantment(item, enchantment.getEnchantment(), 0);
            }
        }

        SlimefunItem sfItem = SlimefunItem.getByItem(item);

        if (sfItem instanceof Soulbound) {
            return !sfItem.isDisabled();
        }
        else if (meta != null) {
            return meta.hasLore() && meta.getLore().contains(SOULBOUND_LORE);
        }

        return false;
    }
}
 

@Override
public IWorldBorder getWorldBorder(Player p) {
    IWorldBorder worldBorder = worldBorderApi.getWorldBorder(p);
    PersistentDataContainer persistentDataContainer = p.getPersistentDataContainer();
    if (persistentDataContainer.has(worldBorderDataKey, worldBorderDataTagType)) {
        applyWorldDataToWorldBorder(worldBorder, persistentDataContainer.get(worldBorderDataKey, worldBorderDataTagType));
    }
    return worldBorder;
}
 

@Override
public void resetWorldBorderToGlobal(Player player) {
    worldBorderApi.resetWorldBorderToGlobal(player);
    PersistentDataContainer persistentDataContainer = player.getPersistentDataContainer();
    if (persistentDataContainer.has(worldBorderDataKey, worldBorderDataTagType)) {
        persistentDataContainer.remove(worldBorderDataKey);
    }
}
 

@Override
public WorldBorderData getWorldBorderData(Player p) {
    PersistentDataContainer persistentDataContainer = p.getPersistentDataContainer();
    if (persistentDataContainer.has(worldBorderDataKey, worldBorderDataTagType)) {
        return persistentDataContainer.get(worldBorderDataKey, worldBorderDataTagType);
    }
    return null;
}
 

private void modifyAndUpdateWorldData(Player player, Consumer<WorldBorderData> worldBorderDataConsumer) {
    PersistentDataContainer persistentDataContainer = player.getPersistentDataContainer();
    WorldBorderData worldBorderData = new WorldBorderData();
    if (persistentDataContainer.has(worldBorderDataKey, worldBorderDataTagType)) {
        worldBorderData = persistentDataContainer.get(worldBorderDataKey, worldBorderDataTagType);
    }
    worldBorderDataConsumer.accept(worldBorderData);
    persistentDataContainer.set(worldBorderDataKey, worldBorderDataTagType, worldBorderData);
}
 

private <T, Z> Optional<Z> get(PersistentDataContainer persistentDataContainer, NamespacedKey namespacedKey, PersistentDataType<T, Z> type) {
    if (persistentDataContainer.has(namespacedKey, type)) {
        return Optional.ofNullable(persistentDataContainer.get(namespacedKey, type));
    }
    return Optional.empty();
}