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import { Logger, LogLevel, LogMessage, LogMessageType, PrepareLogMessagesOptions } from "./Logger";
import { QueryRunner } from "../query-runner/QueryRunner";
import { LoggerOptions } from "./LoggerOptions";
export declare abstract class AbstractLogger implements Logger {
protected options?: LoggerOptions | undefined;
constructor(options?: LoggerOptions | undefined);
/**
* Logs query and parameters used in it.
*/
logQuery(query: string, parameters?: any[], queryRunner?: QueryRunner): void;
/**
* Logs query that is failed.
*/
logQueryError(error: string, query: string, parameters?: any[], queryRunner?: QueryRunner): void;
/**
* Logs query that is slow.
*/
logQuerySlow(time: number, query: string, parameters?: any[], queryRunner?: QueryRunner): void;
/**
* Logs events from the schema build process.
*/
logSchemaBuild(message: string, queryRunner?: QueryRunner): void;
/**
* Logs events from the migration run process.
*/
logMigration(message: string, queryRunner?: QueryRunner): void;
/**
* Perform logging using given logger, or by default to the console.
* Log has its own level and message.
*/
log(level: "log" | "info" | "warn", message: any, queryRunner?: QueryRunner): void;
/**
* Check is logging for level or message type is enabled.
*/
protected isLogEnabledFor(type?: LogLevel | LogMessageType): boolean;
/**
* Write log to specific output.
*/
protected abstract writeLog(level: LogLevel, message: LogMessage | string | number | (LogMessage | string | number)[], queryRunner?: QueryRunner): void;
/**
* Prepare and format log messages
*/
protected prepareLogMessages(logMessage: LogMessage | string | number | (LogMessage | string | number)[], options?: Partial<PrepareLogMessagesOptions>): LogMessage[];
/**
* Converts parameters to a string.
* Sometimes parameters can have circular objects and therefor we are handle this case too.
*/
protected stringifyParams(parameters: any[]): string | any[];
}