SimpleCraftingRecipe.java 文件源码

/**
 * {@inheritDoc}
 */
@Override
public List<? extends ItemStack> getLeftOverItems(CraftingInventory craftingInventory) {
    ItemStack[] matrix = craftingInventory.getMatrix();
    List<ItemStack> leftOver = new ArrayList<>(matrix.length);

    for (int i = 0; i < matrix.length; i++) {
        ItemStack itemStack = matrix[i];

        if (InventoryUtils.isEmptyStack(itemStack)) {
            leftOver.add(null);
            continue;
        }

        ItemStack clone = itemStack.clone();
        MaterialData craftingResult = InventoryUtils.getSingleIngredientResult(itemStack.getData());
        if (craftingResult.getItemType() != Material.AIR) {
            clone.setData(craftingResult);
            leftOver.add(clone);           
            continue;
        }
    }

    craftingInventory.setContents(leftOver.toArray(new ItemStack[matrix.length]));
    return leftOver;
}