import { CollectionViewer } from '@angular/cdk/collections';
import { Observable } from 'rxjs';
import { MigImageData } from '../interfaces/mig-image-data.interface';
import { Page } from '../interfaces/page.interface';
import { DatastoreAdapterServiceBase } from './datastore-adapter.service.base';
/**
 * Class to get a list of images data to display in a mat-image-grid.
 * This class converts the raw data received fom a datastore adapter to a format
 * required by mat-image-grid.
 */
export declare class MigDataSource<T extends MigImageData = MigImageData> {
    private readonly emptyPage;
    private datastore;
    /** Stream emitting data to render. */
    private readonly _data;
    private collectionViewerSubscription;
    /**
     * @param datastore - datastore adapter for datastore to use
     */
    constructor(datastore: DatastoreAdapterServiceBase<T>);
    /**
     * Connects a collection viewer (such as a mat-image-grid) to this data source.
     * The viewChange observable of the CollectionViewer should return no images, when
     * the 'end' property of the ListRange is less than 0.
     * @param collectionViewer - The component that exposes a view over the data provided by this data source.
     * @returns Observable that emits a new value when the data changes.
     */
    connect(collectionViewer: CollectionViewer): Observable<Page<T>>;
    /**
     * Disconnects a collection viewer (such as a mat-image-grid) from this data source.
     * @param collectionViewer - The component that exposes a view over the data provided by this data source.
     */
    disconnect(collectionViewer: CollectionViewer): void;
}