import { Workflow, WorkflowFile, ParamType, SelectorArray } from './types/workflow';
/**
* Class for static processing the workflow files/objects.
*/
export default class Preprocessor {
    static validateWorkflow(workflow: WorkflowFile): any;
    /**
    * Extracts parameter names from the workflow.
    * @param {WorkflowFile} workflow The given workflow
    * @returns {String[]} List of parameters' names.
    */
    static getParams(workflow: WorkflowFile): string[];
    /**
    * List all the selectors used in the given workflow (only literal "selector"
    * field in WHERE clauses so far)
    */
    static extractSelectors(workflow: Workflow): SelectorArray;
    /**
    * Recursively crawl `object` and initializes params - replaces the `{$param : paramName}` objects
    * with the defined value.
    * @returns {Workflow} Copy of the given workflow, modified (the initial workflow is left untouched).
    */
    static initWorkflow(workflow: Workflow, params?: ParamType): Workflow;
}