CopperRecipe.java

public class CopperRecipe implements SmeltingRecipe {
    private ItemStackSnapshot exemplaryIngredient;
    private ItemStackSnapshot exemplaryResult;
    private Text ingredientName = Text.of(TextColors.WHITE, "Copper Ore");
    private Text resultName = Text.of(TextColors.WHITE, "Copper Nugget");
    {
        ItemStack ingredient = ItemStack.builder()
                .itemType(ItemTypes.STONE)
                .keyValue(Keys.STONE_TYPE, StoneTypes.GRANITE)
                .keyValue(Keys.DISPLAY_NAME, ingredientName)
                .build();
        exemplaryIngredient = ingredient.createSnapshot();
        ItemStack result = ItemStack.builder()
                .itemType(ItemTypes.DYE)
                .keyValue(Keys.DYE_COLOR, DyeColors.BROWN)
                .keyValue(Keys.DISPLAY_NAME, resultName)
                .build();
        exemplaryResult = result.createSnapshot();
    }
    @Override
    public ItemStackSnapshot getExemplaryIngredient() {
        return exemplaryIngredient;
    }
    @Override
    public ItemStackSnapshot getExemplaryResult() {
        return exemplaryResult;
    }
    @Override
    public Optional<SmeltingResult> getResult(ItemStackSnapshot ingredient) {
        if (isValid(ingredient)) {
            return Optional.of(new SmeltingResult(exemplaryResult, 0.6));
        } else {
            return Optional.empty();
        }
    }
    @Override
    public boolean isValid(ItemStackSnapshot ingredient) {
        if (!ingredient.getType().equals(ItemTypes.STONE)) return false;
        if (!ingredient.get(Keys.STONE_TYPE).get().equals(StoneTypes.GRANITE)) return false;
        Optional<Text> name = ingredient.get(Keys.DISPLAY_NAME);
        if (!name.isPresent() || !name.get().equals(ingredientName)) return false;
        return true;
    }
}