src/game/java/net/minecraft/client/animation/AnimationDefinition.java

package net.minecraft.client.animation;

import com.google.common.collect.Maps;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public record AnimationDefinition(float lengthInSeconds, boolean looping, Map<String, List<AnimationChannel>> boneAnimations) {
    @OnlyIn(Dist.CLIENT)
    public static class Builder {
        private final float length;
        private final Map<String, List<AnimationChannel>> animationByBone = Maps.newHashMap();
        private boolean looping;

        public static AnimationDefinition.Builder withLength(float p_232276_) {
            return new AnimationDefinition.Builder(p_232276_);
        }

        private Builder(float p_232273_) {
            this.length = p_232273_;
        }

        public AnimationDefinition.Builder looping() {
            this.looping = true;
            return this;
        }

        public AnimationDefinition.Builder addAnimation(String p_232280_, AnimationChannel p_232281_) {
            this.animationByBone.computeIfAbsent(p_232280_, p_325294_ -> new ArrayList<>()).add(p_232281_);
            return this;
        }

        public AnimationDefinition build() {
            return new AnimationDefinition(this.length, this.looping, this.animationByBone);
        }
    }
}