Code/net/minecraft/world/level/entity/EntitySection.java

package net.minecraft.world.level.entity;

import com.mojang.logging.LogUtils;
import java.util.Collection;
import java.util.stream.Stream;
import net.minecraft.util.AbortableIterationConsumer;
import net.minecraft.util.ClassInstanceMultiMap;
import net.minecraft.util.VisibleForDebug;
import net.minecraft.world.phys.AABB;
import org.slf4j.Logger;

public class EntitySection<T extends EntityAccess> {
    private static final Logger LOGGER = LogUtils.getLogger();
    private final ClassInstanceMultiMap<T> storage;
    private Visibility chunkStatus;

    public EntitySection(Class<T> p_156831_, Visibility p_156832_) {
        this.chunkStatus = p_156832_;
        this.storage = new ClassInstanceMultiMap<>(p_156831_);
    }

    public void add(T p_188347_) {
        this.storage.add(p_188347_);
    }

    public boolean remove(T p_188356_) {
        return this.storage.remove(p_188356_);
    }

    public AbortableIterationConsumer.Continuation getEntities(AABB p_262016_, AbortableIterationConsumer<T> p_261863_) {
        for (T t : this.storage) {
            if (t.getBoundingBox().intersects(p_262016_) && p_261863_.accept(t).shouldAbort()) {
                return AbortableIterationConsumer.Continuation.ABORT;
            }
        }

        return AbortableIterationConsumer.Continuation.CONTINUE;
    }

    public <U extends T> AbortableIterationConsumer.Continuation getEntities(
        EntityTypeTest<T, U> p_188349_, AABB p_188350_, AbortableIterationConsumer<? super U> p_261535_
    ) {
        Collection<? extends T> collection = this.storage.find(p_188349_.getBaseClass());
        if (collection.isEmpty()) {
            return AbortableIterationConsumer.Continuation.CONTINUE;
        } else {
            for (T t : collection) {
                U u = (U)p_188349_.tryCast(t);
                if (u != null && t.getBoundingBox().intersects(p_188350_) && p_261535_.accept(u).shouldAbort()) {
                    return AbortableIterationConsumer.Continuation.ABORT;
                }
            }

            return AbortableIterationConsumer.Continuation.CONTINUE;
        }
    }

    public boolean isEmpty() {
        return this.storage.isEmpty();
    }

    public Stream<T> getEntities() {
        return this.storage.stream();
    }

    public Visibility getStatus() {
        return this.chunkStatus;
    }

    public Visibility updateChunkStatus(Visibility p_156839_) {
        Visibility visibility = this.chunkStatus;
        this.chunkStatus = p_156839_;
        return visibility;
    }

    @VisibleForDebug
    public int size() {
        return this.storage.size();
    }
}