Package net.neoforged.neoforge.registries.datamaps

Interface DataMapValueMerger<R,T>

Type Parameters:
T - the data type
R - the type of the registry this merger is for
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface DataMapValueMerger<R,T>
An interface used to merge two conflicting registry data map values attached to the same object.
Using a merger you can, for example, merge list data maps that come from different sources, when otherwise the newest entry would win and override the older one.
API Note:
This is only useful for AdvancedDataMapType.

  • Method Details

    • merge

      T merge(Registry<R> registry, com.mojang.datafixers.util.Either<TagKey<R>,ResourceKey<R>> first, T firstValue, com.mojang.datafixers.util.Either<TagKey<R>,ResourceKey<R>> second, T secondValue)
      Merge two conflicting data map values.
      Parameters:
      registry - the registry the data is for
      first - the source of the first (older) value
      firstValue - the first (older) value
      second - the source of the second (newer) value
      secondValue - the second (newer) value
      Returns:
      the merged value

    • defaultMerger

      static <T, R> DataMapValueMerger<R,T> defaultMerger()
      Returns a default merger that overrides the old value with the new one.
      Returns:
      a default merger that overrides the old value with the new one

    • listMerger

      static <T, R> DataMapValueMerger<R,List<T>> listMerger()
      Returns a default merger that merges list data.
      Returns:
      a default merger that merges list data

    • setMerger

      static <T, R> DataMapValueMerger<R,Set<T>> setMerger()
      Returns a default merger that merges set data.
      Returns:
      a default merger that merges set data

    • mapMerger

      static <K, V, R> DataMapValueMerger<R,Map<K,V>> mapMerger()
      Returns a default merger that merges map data.
      Returns:
      a default merger that merges map data