import { OrmDriver } from "./OrmDriver";
import { ISubscription } from "rxjs/Subscription";
import Collection from "./Collection";
import { EntityClass, MaybeEntityClass } from './utils';
import { IObservable } from './IObservable';
export declare type Operator = "==" | ">=" | ">" | "<" | "<=";
export default class Query<T extends object> implements IObservable<T> {
    model: EntityClass<T>;
    collection: Collection<T>;
    ormDriver: OrmDriver;
    _orderBy: string[] | null;
    _startAt: number | null;
    _limit: number | null;
    private _whereClauses;
    constructor(ormDriver: OrmDriver, model: MaybeEntityClass<T> | Collection<T>);
    orderBy(...fields: string[]): Query<T>;
    limit(number: number): Query<T>;
    startAt(index: number): Query<T>;
    subscribe(handler: (array: T[]) => void): ISubscription;
    observe: (handler: (array: T[]) => void) => ISubscription;
    where(field: string, operator?: Operator, value?: string): Query<T>;
    exec(): Promise<T[]>;
}