export declare enum LogLevel {
    all = 0,
    trace = 10,
    debug = 20,
    info = 30,
    warn = 40,
    error = 50,
    fatal = 60,
    off = 100,
}
export interface LogItem {
    level: LogLevel;
    date?: Date;
    messages: any[];
}
export interface LoggerOption {
    showDate?: boolean;
    showFunctionName?: boolean;
    showLevel?: boolean;
    showFileName?: boolean;
    showLineNumber?: boolean;
    showColumnNumber?: boolean;
    dateFormat?: string;
    useLocalBinding?: boolean;
}
export declare abstract class Logger {
    protected _level: LogLevel;
    protected _addons: any[];
    private _lastLevel;
    private _dateFormat;
    private _table;
    private readonly _loggableLevels;
    protected _traceIndex: number;
    showDate: boolean;
    showFunctionName: boolean;
    showLevel: boolean;
    showFileName: boolean;
    showLineNumber: boolean;
    showColumnNumber: boolean;
    protected _useLocalBinding: boolean;
    [propName: string]: any;
    constructor(option?: LoggerOption);
    abstract _log(item: LogItem): void;
    protected _prepareAddons(item: LogItem): void;
    private _getBasedirAndName(filename);
    private _getLogLevelNames();
    setLevel(level: string | LogLevel): void;
    on(): void;
    off(): void;
}