49 lines
1.8 KiB
Java
49 lines
1.8 KiB
Java
package net.minecraft.world.item;
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import com.mojang.datafixers.util.Either;
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import com.mojang.serialization.Codec;
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import com.mojang.serialization.DataResult;
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import java.util.Optional;
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import java.util.function.Function;
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import net.minecraft.core.Holder;
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import net.minecraft.core.HolderLookup;
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import net.minecraft.core.Registry;
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import net.minecraft.network.RegistryFriendlyByteBuf;
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import net.minecraft.network.codec.ByteBufCodecs;
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import net.minecraft.network.codec.StreamCodec;
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import net.minecraft.resources.ResourceKey;
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public record EitherHolder<T>(Either<Holder<T>, ResourceKey<T>> contents) {
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public EitherHolder(Holder<T> holder) {
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this(Either.left(holder));
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}
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public EitherHolder(ResourceKey<T> key) {
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this(Either.right(key));
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}
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public static <T> Codec<EitherHolder<T>> codec(ResourceKey<Registry<T>> registryKey, Codec<Holder<T>> codec) {
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return Codec.either(
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codec, ResourceKey.codec(registryKey).comapFlatMap(resourceKey -> DataResult.error(() -> "Cannot parse as key without registry"), Function.identity())
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)
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.xmap(EitherHolder::new, EitherHolder::contents);
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}
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public static <T> StreamCodec<RegistryFriendlyByteBuf, EitherHolder<T>> streamCodec(
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ResourceKey<Registry<T>> registryKey, StreamCodec<RegistryFriendlyByteBuf, Holder<T>> streamCodec
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) {
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return StreamCodec.composite(ByteBufCodecs.either(streamCodec, ResourceKey.streamCodec(registryKey)), EitherHolder::contents, EitherHolder::new);
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}
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public Optional<T> unwrap(Registry<T> registry) {
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return this.contents.map(holder -> Optional.of(holder.value()), registry::getOptional);
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}
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public Optional<Holder<T>> unwrap(HolderLookup.Provider registries) {
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return this.contents.map(Optional::of, resourceKey -> registries.get(resourceKey).map(reference -> reference));
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}
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public Optional<ResourceKey<T>> key() {
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return this.contents.map(Holder::unwrapKey, Optional::of);
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}
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}
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