import { type IPackageMetadata, type IPackageJson, type IUnpublishedPackageMetadata } from "../npm.js";
import { type PackageVersion } from "../visitors/visitor.js";
export type PackageMetaData = IPackageMetadata | IUnpublishedPackageMetadata;
export interface IPackageMetaDataProvider {
    getPackageMetadata(name: string): Promise<PackageMetaData | undefined>;
}
export interface IPackageJsonProvider {
    getPackageJson: (...args: PackageVersion) => Promise<IPackageJson>;
}
export declare abstract class AbstractPackageProvider implements IPackageJsonProvider, IPackageMetaDataProvider {
    protected readonly _cache: Map<string, IPackageMetadata>;
    abstract getPackageMetadata(name: string): Promise<PackageMetaData | undefined>;
    getPackageJson(name: string, version?: string | undefined): Promise<IPackageJson>;
}