/**
 * Query result caching for performance optimization
 *
 * Caches the results of evaluated queries to avoid redundant computations
 * when the same path is queried multiple times.
 *
 * SECURITY FIX (BF015): Cache keys now include document identity to prevent
 * cache poisoning between different documents.
 */
/**
 * Query cache with LRU eviction policy
 *
 * BUG-007 FIX: Added tracking for total lookups and misses
 */
export declare class QueryCache {
    private cache;
    private maxSize;
    private accessOrder;
    private totalLookups;
    private totalMisses;
    constructor(maxSize?: number);
    /**
     * Get a cached result (with document identity)
     * SECURITY FIX (BF015): Now includes document ID in key
     * BUG-007 FIX: Track lookups and misses for accurate statistics
     */
    get(key: string, document?: object): any | undefined;
    /**
     * Set a cached result (with document identity)
     * SECURITY FIX (BF015): Now includes document ID in key
     */
    set(key: string, value: any, document?: object): void;
    /**
     * Generate cache key including document identity
     * SECURITY FIX (BF015): Prevents cache poisoning
     */
    private generateKey;
    /**
     * Check if a key exists in cache
     * BUGFIX (BUG-004): Added document parameter for consistent cache key generation
     */
    has(key: string, document?: object): boolean;
    /**
     * Remove a specific entry
     * BUGFIX (BUG-004): Added document parameter for consistent cache key generation
     */
    delete(key: string, document?: object): boolean;
    /**
     * Clear all cached entries
     *
     * BUG-007 FIX: Reset lookup and miss counters
     */
    clear(): void;
    /**
     * Get cache statistics
     *
     * BUG-007 FIX: Return accurate lookups, hits, misses, and hit rate
     */
    getStats(): CacheStats;
    /**
     * Update LRU access order
     */
    private updateAccessOrder;
    /**
     * Evict least recently used entry
     */
    private evictLRU;
    /**
     * Get size in bytes (approximate)
     */
    getSizeInBytes(): number;
}
/**
 * Cache statistics
 *
 * BUG-007 FIX: Added totalMisses and totalLookups for accurate metrics
 */
export interface CacheStats {
    size: number;
    maxSize: number;
    totalHits: number;
    totalMisses: number;
    totalLookups: number;
    averageHits: number;
    hitRate: number;
}
/**
 * Get the global query cache
 */
export declare function getGlobalCache(): QueryCache;
/**
 * Reset the global cache
 */
export declare function resetGlobalCache(): void;
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