So basically I want to make lots of recipes, so

public class Recipes extends RecipeProvider {

    public Recipes(DataGenerator generatorIn) {
        super(generatorIn);
    }

    @Override
    protected void registerRecipes(Consumer<IFinishedRecipe> consumer) {
    	for (EnumMaterials material : EnumMaterials.values()) {
    		for (int i = 0; i < 2; i++) {
    			if (i == 0) {
    				//final RegistryObject<Item> Plate = RegistryObject.of(new ResourceLocation(MorePlates.MODID, material.toString() + "_plate"), ForgeRegistries.ITEMS);
    				final RegistryObject<Item> Ingot = RegistryObject.of(material.getTag(), ForgeRegistries.ITEMS);

    				//TODO set back to Plate.get()
    				ShapelessRecipeBuilder.shapelessRecipe(Ingot.get())
    					.addIngredient(Ingot.get(), 2)
    					.addIngredient(ModItems.HAMMER.get())
    					.build(consumer);
    			} else {
    				final RegistryObject<Item> Gear = RegistryObject.of(new ResourceLocation(MorePlates.MODID, material.toString() + "_gear"), () -> Item.class);
    				final RegistryObject<Item> Ingot = RegistryObject.of(material.getTag(), ForgeRegistries.ITEMS);

    				ShapedRecipeBuilder.shapedRecipe(Gear.get())
                    	.patternLine(" x ")
                    	.patternLine("x#x")
                    	.patternLine(" x ")
                    	.key('x', Ingot.get())
                    	.key('#', Tags.Items.INGOTS_IRON)
                    	.build(consumer);
    			}
    		}
		}
    }

So Plate.get() was erroring saying :

[m[32m[20:36:27] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.NullPointerException: Registry Object not present: moreplates:brick_plate

So I commented it out, checked if normal materials do work, but the problem is still present :

[m[32m[20:36:27] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.NullPointerException: Registry Object not present: minecraft:brick

This got me very confused, how am I supposed to DYNIMACALLY call RegistryObjects?? Some examples of what I set them to can be found in this part of my enum

BRICK(new ResourceLocation("brick")),
CHARCOAL(new ResourceLocation("charcoal")),
COAL(new ResourceLocation("coal")),
ALLTHEMODIUM(new ResourceLocation("allthemodium", "allthemodium")),
;

EnumMaterials(ResourceLocation tag) {
    this.tag = tag;
}

@Override
public String toString() {
    return name().toLowerCase(Locale.ENGLISH);
}

public ResourceLocation getTag() {
    return tag;
}

Any help is appreciated, thanks

Edited October 18, 20204 yr by MostafaSabry55

Why are you using a registry object if you just plan on grabbing the entry directly from the registry itself?

 

For reference, the constructor only adds a handler to the object to populate the objects whenever they are frozen. However, since you are constructing after the snapshot occurs, they will never be populated. This can be circumvented by calling RegistryObject#updateReference, but there is simply no point as you can just grab the instance from the registry itself directly via ForgeRegistries.

Iam completely sure I misunderstood what you said, please bear with me

 

Item Plate = ForgeRegistries.ITEMS.getValue(new ResourceLocation(MorePlates.MODID, material.toString() + "_plate"));
    				Item Ingot = ForgeRegistries.ITEMS.getValue(material.getTag());

    				ShapelessRecipeBuilder.shapelessRecipe(Plate)
    					.addIngredient(Ingot, 2)
    					.addIngredient(ItemTags.createOptional(new ResourceLocation(MorePlates.MODID, "hammer")))
    					.build(consumer);

now that error is gone but it errors with the following

[m[32m[21:16:39] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.IllegalStateException: No way of obtaining recipe moreplates:brick_plate

 

I think I found the problem, I checked ShapelessRecipeBuilder.java:141 and it turns out

if (this.advancementBuilder.getCriteria().isEmpty()) {
    throw new IllegalStateException("No way of obtaining recipe " + id);
}

is true, now there's this #addCriteria for recipe building, why do I need it and how do I use it?

I fixed the error above but,

After some even more painful investegating, I found out that my item's ItemGroup is null which is causing ShapelessRecipeBuilder.java:133 to error

consumerIn.accept(new ShapelessRecipeBuilder.Result(id, this.result, this.count, this.group == null ? "" : this.group, this.ingredients, this.advancementBuilder, new ResourceLocation(id.getNamespace(), "recipes/" + this.result.getGroup().getPath() + "/" + id.getPath())));

the bit that errors is this

new ResourceLocation(
    Registry.ITEM.getKey(Plate).getPath(), 
    /* This line */ "recipes/" + Plate.getGroup().getPath() + "/" + 
    Registry.ITEM.getKey(Plate).getPath());

Now I'm sure Iam setting an ItemGroup to it, as seen here

public static RegistryObject<Item> register(String name) {
    return ITEMS.register(name, () -> new BaseItem(
  		new Item.Properties().group(MorePlates.ITEMGROUP)) //This should work tho??
    );
}

I am in need of help, please

46 minutes ago, MostafaSabry55 said:

I am in need of help, please

Can you please show the entire code block including that of your ItemGroup. To me, some of this code just seems a bit out context. For example:

47 minutes ago, MostafaSabry55 said:

Registry.ITEM.getKey(Plate).getPath()

Why is this used as the namespace when you already have an instance of the namespace itself?

 

9 hours ago, ChampionAsh5357 said:

Can you please show the entire code block including that of your ItemGroup

Sure thing :

public class MorePlatesItemGroup extends ItemGroup {
	public MorePlatesItemGroup() {
		super(MorePlates.MODID);
	}

	@Override
	public ItemStack createIcon() {
		return new ItemStack(ModItems.HAMMER.get());
	}
}

public class RegistryHandler {
    public static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, MorePlates.MODID);

    public static void init() {
        ITEMS.register(FMLJavaModLoadingContext.get().getModEventBus());
    }

    public static RegistryObject<Item> register(String name) {
    	return ITEMS.register(name, () -> new Item(
    			new Item.Properties().group(MorePlates.ITEMGROUP)
    		)
        );
	}
}

 

10 hours ago, ChampionAsh5357 said:

To me, some of this code just seems a bit out context. For example:

Why is this used as the namespace when you already have an instance of the namespace itself?

No no no no no, let me explain what I meant there, basically 

public class Recipes extends RecipeProvider {

    public Recipes(DataGenerator generatorIn) {
        super(generatorIn);
    }

    @Override
    protected void registerRecipes(Consumer<IFinishedRecipe> consumer) {
    	for (EnumMaterials material : EnumMaterials.values()) {
    		for (int i = 0; i < 2; i++) {
    			if (i == 0) {
    				Item Plate = ForgeRegistries.ITEMS.getValue(new ResourceLocation(MorePlates.MODID, material.toString() + "_plate"));
    				Item Ingot = ForgeRegistries.ITEMS.getValue(material.getTag());

    				ShapelessRecipeBuilder.shapelessRecipe(Plate)
    					.addIngredient(Ingot, 2)
    					.addIngredient(ForgeRegistries.ITEMS.getValue(new ResourceLocation(MorePlates.MODID, "hammer")))
    	                .setGroup(material.toString())
    	                .addCriterion("has_item", hasItem(Ingot))
    					.build(consumer);
    			} else {
    				Item Gear = ForgeRegistries.ITEMS.getValue(new ResourceLocation(MorePlates.MODID, material.toString() + "_gear"));
    				Item Ingot = ForgeRegistries.ITEMS.getValue(material.getTag());

    				ShapedRecipeBuilder.shapedRecipe(Gear)
                    	.patternLine(" x ")
                    	.patternLine("x#x")
                    	.patternLine(" x ")
                    	.key('x', Ingot)
                    	.key('#', Tags.Items.INGOTS_IRON)
    	                .setGroup(material.toString())
    	                .addCriterion("has_item", hasItem(Ingot))
                    	.build(consumer);
    			}
    		}
		}
    }
}

Now when I build my recipe " .build(consumer) ", it errors with a null pointer exception

[m[32m[09:11:44] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.NullPointerException
[m[32m[09:11:44] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: 	at net.minecraft.data.ShapelessRecipeBuilder.build(ShapelessRecipeBuilder.java:133)
[m[32m[09:11:44] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: 	at net.minecraft.data.ShapelessRecipeBuilder.build(ShapelessRecipeBuilder.java:111)

at the line that I just posted

consumerIn.accept(new ShapelessRecipeBuilder.Result(id, this.result, this.count, this.group == null ? "" : this.group, this.ingredients, this.advancementBuilder, new ResourceLocation(id.getNamespace(), "recipes/" + this.result.getGroup().getPath() + "/" + id.getPath())));

Now in THIS LINE in ShapelessRecipeBuilder, I noticed that the last parameter was the cause which is :

new ResourceLocation(id.getNamespace(), "recipes/" + this.result.getGroup().getPath() + "/" + id.getPath())

was the cause, sorry for me changing them to my items, I was testing and I was also unclear, now I dunno what I'm doing wrong

WHOOPS. I forgot to auto register a few materials (they're divided into seperate plugins, normal classes), printing is so useful

 

Problem fixed, sorry for wasting your time