/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/// <reference types="node" />
import { BaseException } from '@angular-devkit/core';
import { Observable } from 'rxjs';
import { Url } from 'url';
import { MergeStrategy } from '../tree/interface';
import { Workflow } from '../workflow/interface';
import { Collection, CollectionDescription, Engine, EngineHost, ExecutionOptions, Schematic, SchematicContext, SchematicDescription, Source, TaskConfiguration, TaskId, TaskInfo, TypedSchematicContext } from './interface';
export declare class UnknownUrlSourceProtocol extends BaseException {
    constructor(url: string);
}
export declare class UnknownCollectionException extends BaseException {
    constructor(name: string);
}
export declare class CircularCollectionException extends BaseException {
    constructor(name: string);
}
export declare class UnknownSchematicException extends BaseException {
    constructor(name: string, collection: CollectionDescription<{}>);
}
export declare class PrivateSchematicException extends BaseException {
    constructor(name: string, collection: CollectionDescription<{}>);
}
export declare class SchematicEngineConflictingException extends BaseException {
    constructor();
}
export declare class UnregisteredTaskException extends BaseException {
    constructor(name: string, schematic?: SchematicDescription<{}, {}>);
}
export declare class UnknownTaskDependencyException extends BaseException {
    constructor(id: TaskId);
}
export declare class CollectionImpl<CollectionT extends object, SchematicT extends object> implements Collection<CollectionT, SchematicT> {
    private _description;
    private _engine;
    readonly baseDescriptions?: CollectionDescription<CollectionT>[] | undefined;
    constructor(_description: CollectionDescription<CollectionT>, _engine: SchematicEngine<CollectionT, SchematicT>, baseDescriptions?: CollectionDescription<CollectionT>[] | undefined);
    get description(): CollectionDescription<CollectionT>;
    get name(): string;
    createSchematic(name: string, allowPrivate?: boolean): Schematic<CollectionT, SchematicT>;
    listSchematicNames(): string[];
}
export declare class TaskScheduler {
    private _context;
    private _queue;
    private _taskIds;
    private static _taskIdCounter;
    constructor(_context: SchematicContext);
    private _calculatePriority;
    private _mapDependencies;
    schedule<T>(taskConfiguration: TaskConfiguration<T>): TaskId;
    finalize(): ReadonlyArray<TaskInfo>;
}
export declare class SchematicEngine<CollectionT extends object, SchematicT extends object> implements Engine<CollectionT, SchematicT> {
    private _host;
    protected _workflow?: Workflow | undefined;
    private _collectionCache;
    private _schematicCache;
    private _taskSchedulers;
    constructor(_host: EngineHost<CollectionT, SchematicT>, _workflow?: Workflow | undefined);
    get workflow(): Workflow | null;
    get defaultMergeStrategy(): MergeStrategy;
    createCollection(name: string, requester?: Collection<CollectionT, SchematicT>): Collection<CollectionT, SchematicT>;
    private _createCollectionDescription;
    createContext(schematic: Schematic<CollectionT, SchematicT>, parent?: Partial<TypedSchematicContext<CollectionT, SchematicT>>, executionOptions?: Partial<ExecutionOptions>): TypedSchematicContext<CollectionT, SchematicT>;
    createSchematic(name: string, collection: Collection<CollectionT, SchematicT>, allowPrivate?: boolean): Schematic<CollectionT, SchematicT>;
    listSchematicNames(collection: Collection<CollectionT, SchematicT>): string[];
    transformOptions<OptionT extends object, ResultT extends object>(schematic: Schematic<CollectionT, SchematicT>, options: OptionT, context?: TypedSchematicContext<CollectionT, SchematicT>): Observable<ResultT>;
    createSourceFromUrl(url: Url, context: TypedSchematicContext<CollectionT, SchematicT>): Source;
    executePostTasks(): Observable<void>;
}