import type { JoinOptions, JoinResolver } from '@nestjs-crud/core';
import type { QueryJoin } from '@nestjs-crud/request';
export interface PrismaJoinResolverConfig {
    relationFields: string[];
    allowedColumnsByRelation: Record<string, string[]>;
}
/**
 * Resolves relation allowlists for PrismaQueryComposer's SQLi guard.
 *
 * Prisma uses `include` (not SQL JOIN) for relation traversal, so `applyJoins`
 * is intentionally not needed here — include blocks are assembled inside
 * `PrismaQueryComposer.getIncludeObject`. This resolver's job is purely to
 * provide the dotted-path sort allowlist (SQLi mitigation surface).
 *
 * @since 2.0.0
 */
export declare class PrismaJoinResolver implements JoinResolver<any> {
    private readonly config;
    constructor(config: PrismaJoinResolverConfig);
    /**
     * Return the allowed column name set for a given relation name.
     * Returns an empty Set for unknown relations — callers must check `.size`
     * and reject before any identifier reaches Prisma's orderBy.
     * SQLi mitigation surface.
     */
    getAllowedColumnsFor(relation: string): ReadonlySet<string>;
    /**
     * Returns true if the relation name is in the known relation fields list.
     */
    isKnownRelation(relation: string): boolean;
    /**
     * Not needed for Prisma — relation navigation happens via `include` in
     * PrismaQueryComposer, not via SQL JOIN. This method satisfies the
     * JoinResolver interface contract but is never called by the Prisma adapter.
     *
     * @internal
     */
    applyJoins(_query: any, _joins: QueryJoin[], _joinOptions: JoinOptions): any;
}