import { Plan } from '../query/QueryPlan';
import { Graph } from '../graph';
import { Query, QueryLike, QueryParameters } from '../query';
import { Stream } from "@andyfischer/streams";
export interface Args {
    graph: Graph;
    withQuery: Query;
    input: Stream;
    output: Stream;
    plan: Plan;
    queryParameters: QueryParameters;
}
export declare class Task {
    graph: Graph;
    input: Stream;
    output: Stream;
    withQuery: Query;
    queryParameters: QueryParameters;
    plan: Plan;
    t: string;
    constructor(args: Args);
    hasAttr(attr: string): boolean;
    hasValue(attr: string): boolean;
    getValue(attr: string): any;
    query(queryLike: QueryLike, params?: QueryParameters): Stream<any>;
    put(item: any): void;
    log(message: string, data?: any): void;
}