import { ID } from '../util/id';
import { EventEmitter } from '../util/eventEmitter';
export declare enum ProcessorType {
  Initiator = 0,
  ServerFilter = 1,
  ServerSort = 2,
  ServerLimit = 3,
  Extractor = 4,
  Transformer = 5,
  Filter = 6,
  Sort = 7,
  Limit = 8,
}
interface PipelineProcessorEvents<T, P> {
  propsUpdated: (processor: PipelineProcessor<T, P>) => void;
  beforeProcess: (...args: any[]) => void;
  afterProcess: (...args: any[]) => void;
}
export interface PipelineProcessorProps {}
export declare abstract class PipelineProcessor<
  T,
  P extends Partial<PipelineProcessorProps>
> extends EventEmitter<PipelineProcessorEvents<T, P>> {
  readonly id: ID;
  private readonly _props;
  abstract get type(): ProcessorType;
  protected abstract _process(...args: any[]): T | Promise<T>;
  protected validateProps?(...args: any[]): void;
  constructor(props?: Partial<P>);
  /**
   * process is used to call beforeProcess and afterProcess callbacks
   * This function is just a wrapper that calls _process()
   *
   * @param args
   */
  process(...args: any[]): T | Promise<T>;
  setProps(props: Partial<P>): this;
  get props(): P;
}
export {};