import { TQueryValue } from "../../types";
import { Type } from "@simplysm/sd-core-common";
import { QueryUnit } from "../queryable/QueryUnit";
import { QueryHelper } from "../query-builder/QueryHelper";
import { TEntityValue } from "../queryable/types";
import { TQueryBuilderValue } from "../query-builder/types";
export declare class CaseQueryHelper<T extends TQueryValue> {
    private readonly _qh;
    private _type;
    private readonly _cases;
    constructor(_qh: QueryHelper, _type: Type<T> | undefined);
    case(predicate: TEntityValue<boolean | Boolean> | TQueryBuilderValue, then: TEntityValue<T>): this;
    else(then: TEntityValue<T>): QueryUnit<T>;
}