Minecraftforge: IResultFactory or extendable recipe factories

[blay09]

Currently it seems like the only way of defining a custom result is either making one file for each option and putting excluding conditions in each, or creating your own recipe factory. Problem with the recipe factory is that the existing factories are defined either as lambdas or methods, and are therefore not extendable (meaning you would have to duplicate the entire code even if all you wanted to change is how the result is parsed).

An easy solution would be moving them into an extendable class with a protected parseResult(JsonObject json, JsonContext context) modders can override in a subclass. A possibly more clean solution would be to provide an IResultFactory that works similar to all the other factories.

As for my use case: my mod Ex Compressum supports multiple Ex Nihilo variants at the same time, which means some of the recipes have to automatically adjust based on what variant is being used. Multiple files with forge:mod_loaded each would work, but wouldn't be very elegant and would exclude the possibility of a mod adding support from their side. Another use case would be recipes that adjust based on configurations or other external factors.

Mockup recipe factory using Solution 1 (extendable default recipe factories):

public class NihiloRecipeFactory extends ShapelessOreRecipe {
    @Override
    public ItemStack parseResult(JsonObject json, JsonContext context) {
        return ExNihiloProvider.getNihiloItem(json.get("value").getAsString());
    }
}

Mockup recipe using Solution 2 (IResultFactory):

{
  "type": "forge:ore_shapeless",
  "result": {
    "type": "excompressum:nihilo_result_item",
    "value": "DUST",
    "count": 9
  },
  "ingredients": [
    {
      "item": "excompressum:compressed_block",
      "data": 0
    }
  ],
  "conditions": [
    {
      "type": "excompressum:has_nihilo_item",
      "value": "DUST"
    }
  ]
}

I can PR either solution once I know which would be preferred.

[loordgek]

i vote for the IResultFactory

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