import type { IAction, IActorArgs, IActorOutput, IActorTest, Mediate } from '@comunica/core';
import { Actor } from '@comunica/core';
import type { QueryFormatType, IQueryExplained, IActionContext, IQueryOperationResult } from '@comunica/types';
import type { Algebra } from '@comunica/utils-algebra';
/**
 * A comunica actor for query-process events.
 *
 * Actor types:
 * * Input:  IActionQueryProcess:      The input query to process.
 * * Test:   <none>
 * * Output: IActorQueryProcessOutput: Output of the query processing.
 *
 * @see IActionQueryProcess
 * @see IActorQueryProcessOutput
 */
export declare abstract class ActorQueryProcess<TS = undefined> extends Actor<IActionQueryProcess, IActorTest, IActorQueryProcessOutput, TS> {
    /**
     * @param args -
     *   \ @defaultNested {<default_bus> a <cc:components/Bus.jsonld#Bus>} bus
     *   \ @defaultNested {Query processing failed: none of the configured actor were process to the query "${action.query}"} busFailMessage
     */
    constructor(args: IActorQueryProcessArgs<TS>);
}
export interface IActionQueryProcess extends IAction {
    /**
     * The query to process.
     */
    query: QueryFormatType;
}
export interface IActorQueryProcessOutput extends IActorOutput {
    /**
     * Result of the query processing.
     */
    result: IQueryOperationResult | IQueryExplained;
}
export type IActorQueryProcessArgs<TS = undefined> = IActorArgs<IActionQueryProcess, IActorTest, IActorQueryProcessOutput, TS>;
export type MediatorQueryProcess = Mediate<IActionQueryProcess, IActorQueryProcessOutput>;
export interface IQueryProcessSequential {
    parse: (query: QueryFormatType, context: IActionContext) => Promise<IQueryProcessSequentialOutput>;
    optimize: (operation: Algebra.Operation, context: IActionContext) => Promise<IQueryProcessSequentialOutput>;
    evaluate: (operation: Algebra.Operation, context: IActionContext) => Promise<IQueryOperationResult>;
}
export interface IQueryProcessSequentialOutput {
    operation: Algebra.Operation;
    context: IActionContext;
}