@comunica/actor-init-query/lib/VoidMetadataEmitter.d.ts

A query init actor

import type * as http from 'node:http';
import type { Writable } from 'node:stream';
import type * as RDF from '@rdfjs/types';
import type { QueryEngineBase } from '..';
/**
 * A VoID metadata emitter that emits metadata used in VoID description of the HTTP service sparql endpoint.
 */
export declare class VoidMetadataEmitter {
    private static readonly STRING_LITERALS;
    private static readonly DATE_LITERALS;
    readonly context: any;
    cachedStatistics: RDF.Quad[];
    constructor(context: any);
    invalidateCache(): void;
    /**
     * Returns a list of all necessary VoID quads.
     * @param {QueryEngineBase} engine A SPARQL engine.
     * @param {module:stream.internal.Writable} stdout
     * @param {module:http.IncomingMessage} request
     * @param {module:http.ServerResponse} response
     */
    getVoIDQuads(engine: QueryEngineBase, stdout: Writable, request: http.IncomingMessage, response: http.ServerResponse): Promise<RDF.Quad[]>;
    private convertValue;
    /**
     * Fetches the necessary VoID statistics quads and assigns them to this.cachedStatistics
     * @param {QueryEngineBase} engine A SPARQL engine.
     * @private
     */
    private fetchVoIDStatistics;
}