import { EmbeddedLink, Entity, Link } from '../models';
import { Target } from '../utils';
import { DefaultSirenElementVisitor } from '../visitor';
/** [Selection policy](https://en.wikipedia.org/wiki/Web_crawler#Selection_policy) for a Crawler */
export interface SelectionPolicy {
    /** Selects targets from the given {@linkcode Entity} to crawl */
    selectFrom(entity: Entity): Promise<Target[]>;
}
/**
 * Default {@linkcode SelectionPolicy} that collects all the {@linkcode Link}s and
 * {@linkcode EmbeddedLink}s in an {@linkcode Entity}
 */
export declare class DefaultSelectionPolicy extends DefaultSirenElementVisitor implements SelectionPolicy {
    private urls;
    visitEmbeddedLink(link: EmbeddedLink): void;
    visitLink(link: Link): void;
    selectFrom(entity: Entity): Promise<Target[]>;
}