import { DataSource } from '@angular/cdk/collections';
import { MatPaginator, MatSort } from '@angular/material';
import { Observable, BehaviorSubject } from 'rxjs';
/**
 * Data source for the NgxDataTable view. This class should
 * encapsulate all logic for fetching and manipulating the displayed data
 * (including sorting, pagination, and filtering).
 */
export declare class NgxDataTableDataSource extends DataSource<any> {
    private paginator;
    private _data;
    private sort;
    data: any[];
    _filterChange: BehaviorSubject<string>;
    filteredData: any[];
    filter: string;
    constructor(paginator: MatPaginator, _data: any[], sort: MatSort);
    /**
     * Connect this data source to the table. The table will only update when
     * the returned stream emits new items.
     * @returns A stream of the items to be rendered.
     */
    connect(): Observable<any[]>;
    private _enrichData(filtered);
    private _filterData(data);
    /**
     *  Called when the table is being destroyed. Use this function, to clean up
     * any open connections or free any held resources that were set up during connect.
     */
    disconnect(): void;
    /**
     * Paginate the data (client-side). If you're using server-side pagination,
     * this would be replaced by requesting the appropriate data from the server.
     */
    private getPagedData(data);
    /**
     * Sort the data (client-side). If you're using server-side sorting,
     * this would be replaced by requesting the appropriate data from the server.
     */
    private getSortedData(data);
}