import { FormatContext } from './format-context';
export declare class Formatter {
    private handlers;
    extend(formatter: Formatter): this;
    add<T>(handler: FormatHandle<any>): this;
    canHandle(value: any): boolean;
    format(value: any, ctx: FormatContext): string;
}
export declare enum FormatType {
    Sql = 0,
    Value = 1,
    Condition = 2,
    Table = 3,
    Join = 4,
    OrderBy = 5
}
export interface FormatHandle<T> {
    type: FormatType | FormatType[];
    canHandle(param: any): boolean;
    handle(param: T, ctx: FormatContext, formatter: Formatter): string;
}