I made a recipe in an older version that adds a string as NBT to tools. Right now I'm having a hard time updating the code to 1.12. Crafting recipes are now registered as json files, which is obviously not possible in a case like this.

 

I have fourproblems that I can't figure out right now:

1) What code do I need to register the recipe?

2) In the recipe class I have an error on the return type of #getRemainingItems. What do I need to change there?

3) #getRecipeSize is apparently not a method of the implemented interface. So I still need this?

4) The interface implemented has got 4 new methods with return values that I have no idea what to make of. What do they need to return?

 

Any help is appreciated. Thanks in advance.

 

Registering:

GameRegistry.addRecipe(new RecipeChecksum()); 

 

Recipe class:

 

	package anagkai.biodiversity.crafting;
	import java.util.List;
import javax.annotation.Nullable;
import com.google.common.collect.Lists;
import net.minecraft.init.Items;
import net.minecraft.inventory.InventoryCrafting;
import net.minecraft.item.Item;
import net.minecraft.item.ItemPickaxe;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.IRecipe;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.World;
	public class RecipeChecksum implements IRecipe
{
    /**
     * Used to check if a recipe matches current crafting inventory
     */
    public boolean matches(InventoryCrafting inv, World worldIn)
    {
        ItemStack itemstack = null;
        List<ItemStack> list = Lists.<ItemStack>newArrayList();
	        for (int i = 0; i < inv.getSizeInventory(); ++i)
        {
            ItemStack itemstack1 = inv.getStackInSlot(i);
	            if (itemstack1 != null)
            {
                if (itemstack1.getItem() instanceof ItemPickaxe)
                {
                    ItemPickaxe itemarmor = (ItemPickaxe)itemstack1.getItem();
	                    if (itemstack != null)
                    {
                        return false;
                    }
	                    itemstack = itemstack1;
                }
                else
                {
                    if (!isCodeItem(itemstack1.getItem(), itemstack1.getMetadata()))
                    {
                        return false;
                    }
	                    list.add(itemstack1);
                }
            }
        }
	        return itemstack != null && !list.isEmpty();
    }
    
    public boolean isCodeItem(Item item, int meta){
        if(item == Items.POISONOUS_POTATO){
            return true;
        }
        if(item == Items.FEATHER){
            return true;
        }
        if(item == Items.GUNPOWDER){
            return true;
        }
        if(item == Items.FISH && meta == 2){
            return true;
        }
        if(item == Items.FISH && meta == 3){
            return true;
        }
        return false;
    }
    
    public String getCodeForItem(Item item, int meta){
        if(item == Items.POISONOUS_POTATO){
            return "P";
        }
        if(item == Items.FEATHER){
            return "F";
        }
        if(item == Items.GUNPOWDER){
            return "G";
        }
        if(item == Items.FISH && meta == 2){
            return "C";
        }
        if(item == Items.FISH && meta == 3){
            return "U";
        }
        return "";
    }
	    /**
     * Returns an Item that is the result of this recipe
     */
    @Nullable
    public ItemStack getCraftingResult(InventoryCrafting inv)
    {
        ItemStack itemstack = null;
        String checksum = "";
        ItemPickaxe itempickaxe = null;
	        for (int k = 0; k < inv.getSizeInventory(); ++k)
        {
            ItemStack itemstack1 = inv.getStackInSlot(k);
	            if (itemstack1 != null)
            {
                if (itemstack1.getItem() instanceof ItemPickaxe)
                {
                    itempickaxe = (ItemPickaxe)itemstack1.getItem();
	                    if (itemstack != null)
                    {
                        return null;
                    }
	                    itemstack = new ItemStack(itemstack1.getItem(), 1);
                }
                else
                {
                    if (!isCodeItem(itemstack1.getItem(), itemstack1.getMetadata()))
                    {
                        return null;
                    }
                    
                    checksum += getCodeForItem(itemstack1.getItem(), itemstack1.getMetadata());
                    
                }
            }
        }
	        if (itempickaxe == null)
        {
            return null;
        }
        else
        {
            if(itemstack.getTagCompound() != null){
            itemstack.getTagCompound().setString("checksum", checksum);
            }else{
                itemstack.setTagCompound(new NBTTagCompound());
                itemstack.getTagCompound().setString("checksum", checksum);
            }
            return itemstack;
        }
    }
	    /**
     * Returns the size of the recipe area
     */
    public int getRecipeSize()
    {
        return 10;
    }
	    @Nullable
    public ItemStack getRecipeOutput()
    {
        return null;
    }
	    public ItemStack[] getRemainingItems(InventoryCrafting inv)
    {
        ItemStack[] aitemstack = new ItemStack[inv.getSizeInventory()];
	        for (int i = 0; i < aitemstack.length; ++i)
        {
            ItemStack itemstack = inv.getStackInSlot(i);
            aitemstack[i] = net.minecraftforge.common.ForgeHooks.getContainerItem(itemstack);
        }
	        return aitemstack;
    }
	    @Override
    public IRecipe setRegistryName(ResourceLocation name) {
        return null;
    }
	    @Override
    public ResourceLocation getRegistryName() {
        return null;
    }
	    @Override
    public Class<IRecipe> getRegistryType() {
        return null;
    }
	    @Override
    public boolean canFit(int width, int height) {
        return false;
    }
}
	

 

Edited August 4, 20196 yr by Anagkai

You need a _factories.json:

https://github.com/Draco18s/ReasonableRealism/tree/1.12.1/src/main/resources/assets/hardlib/recipes