import { Datasource } from "./Datasource.js";
import { HtmlRR0Context } from "../../RR0Context.js";
import { ContextFilter } from "./ContextFilter.js";
/**
 * Cache cases which were already fetched, and filter out cases in memory according to (time) context.
 */
export declare abstract class AbstractDatasource<S> implements Datasource<S> {
    readonly authors: string[];
    readonly copyright: string;
    protected readonly cases: Map<string, S[]>;
    protected constructor(authors: string[], copyright: string);
    getCases(context: HtmlRR0Context): Promise<S[]>;
    fetch(context: HtmlRR0Context): Promise<S[]>;
    protected createFilter(context: HtmlRR0Context): ContextFilter<S>;
    protected contextKey(context: HtmlRR0Context): string;
    protected abstract readCases(context: HtmlRR0Context): Promise<S[]>;
}