/**
 * @nahisaho/yata-scale - L1 Cache (Hot)
 *
 * In-memory LRU cache for frequently accessed data
 */
import type { CacheStats, Entity, Relationship } from '../types.js';
/**
 * L1 Cache - Hot tier, in-memory LRU
 */
export declare class L1Cache {
    private readonly entityCache;
    private readonly relationshipCache;
    private hits;
    private misses;
    constructor(maxEntries?: number);
    /**
     * Get entity from cache
     */
    getEntity(id: string): Entity | undefined;
    /**
     * Set entity in cache
     */
    setEntity(entity: Entity): void;
    /**
     * Delete entity from cache
     */
    deleteEntity(id: string): boolean;
    /**
     * Get relationship from cache
     */
    getRelationship(id: string): Relationship | undefined;
    /**
     * Set relationship in cache
     */
    setRelationship(relationship: Relationship): void;
    /**
     * Delete relationship from cache
     */
    deleteRelationship(id: string): boolean;
    /**
     * Check if entity exists in cache
     */
    hasEntity(id: string): boolean;
    /**
     * Check if relationship exists in cache
     */
    hasRelationship(id: string): boolean;
    /**
     * Get multiple entities
     */
    getEntities(ids: string[]): Map<string, Entity>;
    /**
     * Set multiple entities
     */
    setEntities(entities: Entity[]): void;
    /**
     * Clear all caches
     */
    clear(): void;
    /**
     * Get hot keys (most accessed)
     */
    getHotKeys(limit?: number): string[];
    /**
     * Prewarm cache with entities
     */
    prewarm(entities: Entity[]): void;
    /**
     * Get cache statistics
     */
    getStats(): CacheStats;
    /**
     * Estimate memory size
     */
    private estimateSize;
    /**
     * Estimate entity size in bytes
     */
    private estimateEntitySize;
    /**
     * Estimate relationship size in bytes
     */
    private estimateRelationshipSize;
    /**
     * Get entity count
     */
    get entityCount(): number;
    /**
     * Get relationship count
     */
    get relationshipCount(): number;
    /**
     * Get total entry count
     */
    get size(): number;
}
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