export declare const defaultOptions: {
    maxVectorSize: number;
    maxSimilarDocuments: number;
    minScore: number;
    debug: boolean;
};
export interface OptionsDTO {
    maxVectorSize: number;
    maxSimilarDocuments: number;
    minScore: number;
    debug: boolean;
}
export declare class ContentFiltering {
    private options;
    private data;
    constructor(options?: OptionsDTO);
    setOptions(options: OptionsDTO): void;
    train(documents: any[]): void;
    validateDocuments(documents: any[]): void;
    getSimilarDocuments(id: any, start: number | undefined, size: number | undefined): any[];
    export(): {
        options: any;
        data: any;
    };
    import(object: any): void;
    _preprocessDocuments(documents: any[], options: OptionsDTO): {
        id: any;
        tokens: string[];
        data: any;
    }[];
    _getTokensFromString(text: string): string[];
    _produceWordVectors(processedDocuments: any[], options: OptionsDTO): {
        id: any;
        vector: any;
        data: any;
    }[];
    _calculateSimilarities(documentVectors: any[], options: OptionsDTO): any;
}