GlobalItemParser.java 文件源码

public ItemStack parseItem(Element el, Material type, short damage) throws InvalidXMLException {
    int amount = XMLUtils.parseNumber(el.getAttribute("amount"), Integer.class, 1);

    // If the item is a potion with non-zero damage, and there is
    // no modern potion ID, decode the legacy damage value.
    final Potion legacyPotion;
    if(type == Material.POTION && damage > 0 && el.getAttribute("potion") == null) {
        try {
            legacyPotion = Potion.fromDamage(damage);
        } catch(IllegalArgumentException e) {
            throw new InvalidXMLException("Invalid legacy potion damage value " + damage + ": " + e.getMessage(), el, e);
        }

        // If the legacy splash bit is set, convert to a splash potion
        if(legacyPotion.isSplash()) {
            type = Material.SPLASH_POTION;
            legacyPotion.setSplash(false);
        }

        // Potions always have damage 0
        damage = 0;
    } else {
        legacyPotion = null;
    }

    ItemStack itemStack = new ItemStack(type, amount, damage);
    if(itemStack.getType() != type) {
        throw new InvalidXMLException("Invalid item/block", el);
    }

    final ItemMeta meta = itemStack.getItemMeta();
    if(meta != null) { // This happens if the item is "air"
        parseItemMeta(el, meta);

        // If we decoded a legacy potion, apply it now, but only if there are no custom effects.
        // This emulates the old behavior of custom effects overriding default effects.
        if(legacyPotion != null) {
            final PotionMeta potionMeta = (PotionMeta) meta;
            if(!potionMeta.hasCustomEffects()) {
                potionMeta.setBasePotionData(new PotionData(legacyPotion.getType(),
                                                            legacyPotion.hasExtendedDuration(),
                                                            legacyPotion.getLevel() == 2));
            }
        }

        itemStack.setItemMeta(meta);
    }

    return itemStack;
}