SimpleShapelessRecipe.java 文件源码

/**
 * {@inheritDoc}
 */
@Override
public boolean matches(CraftingInventory craftingInventory, World world) {
    final List<ChoiceIngredient> ingredients = new ArrayList<>(this.ingredients);
    final List<ItemStack> contents = Arrays.asList(craftingInventory.getMatrix())
            .stream().filter(i -> !InventoryUtils.isEmptyStack(i))
            .collect(Collectors.toList());

    for (ItemStack stack : contents) {
        boolean match = false;
        for (int ingredientIndex = 0; ingredientIndex < ingredients.size(); ingredientIndex++) {
            ChoiceIngredient ingredient = ingredients.get(ingredientIndex);
            if (ingredient.isIngredient(stack)) {
                ingredients.remove(ingredientIndex);
                match = true;
                break;
            }
        }

        //there was no matching ingredient for the current ItemStack
        if (!match) return false;
    }

    //return true if there are no unused ingredients left over
    return ingredients.isEmpty();
}