import { FunctionExpression } from "../ExpressionBuilder/Expression/FunctionExpression";
import { IColumnMetaData } from "./Interface/IColumnMetaData";
import { IEntityMetaData } from "./Interface/IEntityMetaData";
import { GenericType } from "../Common/Type";
export declare class ComputedColumnMetaData<TE = any, T = any> implements IColumnMetaData<TE, T> {
    entity: IEntityMetaData<TE>;
    description: string;
    functionExpression: FunctionExpression<T>;
    readonly type: GenericType<T>;
    columnName: string;
    propertyName: keyof TE;
    constructor();
    constructor(entity: IEntityMetaData<TE>, fn: (item: TE) => T, propertyName: keyof TE);
    applyOption(option: ComputedColumnMetaData<TE>): void;
}