import type { QueryOptions, QueryResult } from '../types';
export interface QueryIndexLookup {
    hasIndexOnField(field: string): boolean;
    getItemIndexesByField(field: string, value: any): number[];
}
export declare class QueryEngine {
    private readonly indexes?;
    constructor(indexes?: QueryIndexLookup | undefined);
    execute<T>(data: T[], options?: QueryOptions<T>): QueryResult<T>;
    validateQueryOptions(options: QueryOptions<any>): void;
    private applyFilter;
    private getIndexedCandidateIndexes;
    private getIndexLookupValues;
    private isOperatorObject;
    private applySelect;
}