src/game/java/net/minecraft/stats/Stat.java

package net.minecraft.stats;

import java.util.Objects;
import javax.annotation.Nullable;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.core.registries.Registries;
import net.minecraft.network.RegistryFriendlyByteBuf;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.world.scores.criteria.ObjectiveCriteria;

public class Stat<T> extends ObjectiveCriteria {
    public static final StreamCodec<RegistryFriendlyByteBuf, Stat<?>> STREAM_CODEC = ByteBufCodecs.registry(Registries.STAT_TYPE)
        .dispatch(Stat::getType, StatType::streamCodec);
    private final StatFormatter formatter;
    private final T value;
    private final StatType<T> type;

    protected Stat(StatType<T> p_12856_, T p_12857_, StatFormatter p_12858_) {
        super(buildName(p_12856_, p_12857_));
        this.type = p_12856_;
        this.formatter = p_12858_;
        this.value = p_12857_;
    }

    public static <T> String buildName(StatType<T> p_12863_, T p_12864_) {
        return locationToKey(BuiltInRegistries.STAT_TYPE.getKey(p_12863_)) + ":" + locationToKey(p_12863_.getRegistry().getKey(p_12864_));
    }

    private static <T> String locationToKey(@Nullable ResourceLocation p_12866_) {
        return p_12866_.toString().replace(':', '.');
    }

    public StatType<T> getType() {
        return this.type;
    }

    public T getValue() {
        return this.value;
    }

    public String format(int p_12861_) {
        return this.formatter.format(p_12861_);
    }

    @Override
    public boolean equals(Object p_12869_) {
        return this == p_12869_ || p_12869_ instanceof Stat && Objects.equals(this.getName(), ((Stat)p_12869_).getName());
    }

    @Override
    public int hashCode() {
        return this.getName().hashCode();
    }

    @Override
    public String toString() {
        return "Stat{name=" + this.getName() + ", formatter=" + this.formatter + "}";
    }
}