import type { AsyncIterator } from 'asynciterator';
import type { Quad, Term, Variable } from '@rdfjs/types';
import type { SparqlEngine, SparqlQueryOptions, SparqlVoidOptions } from '../sparql/SubgraphQueryEngine';
import type { RdfAccessScope } from './RdfAccessScope';
import type { RdfEngineLike } from './types';
type QleverBindingsStream = AsyncIterator<QleverBindings> & {
    metadata(): Promise<{
        variables: Variable[];
    }>;
};
/**
 * Thin CSS SparqlEngine adapter over the shared native QLever envelope.
 *
 * It performs product-boundary validation and result decoding only. It has no
 * alternate evaluator, planner, update compiler, or secondary execution path.
 */
export declare class QleverSparqlEngine implements SparqlEngine {
    private readonly rdfEngine;
    constructor(rdfEngine: RdfEngineLike);
    queryBindings(query: string, basePath: string, accessScope?: RdfAccessScope, options?: SparqlQueryOptions): Promise<QleverBindingsStream>;
    queryBoolean(query: string, basePath: string, accessScope?: RdfAccessScope, options?: SparqlQueryOptions): Promise<boolean>;
    queryQuads(query: string, basePath: string, accessScope?: RdfAccessScope, options?: SparqlQueryOptions): Promise<AsyncIterator<Quad>>;
    queryVoid(_query: string, _basePath: string, _accessScope?: RdfAccessScope, _options?: SparqlVoidOptions): Promise<void>;
    constructGraph(graph: string, basePath: string, accessScope?: RdfAccessScope): Promise<AsyncIterator<Quad>>;
    listGraphs(basePath: string, accessScope?: RdfAccessScope): Promise<Set<string>>;
    close(): Promise<void>;
    private execute;
}
declare class QleverBindings extends Map<Variable, Term> {
    private readonly byName;
    constructor(entries: [Variable, Term][]);
    get(key: string | Variable): Term | undefined;
    has(key: string | Variable): boolean;
}
export {};