解释器设计模式_lua解释器交互模式_解释器模式c语言(19)

public class ConsoleLogger extends AbstractLogger {
    public ConsoleLogger(int level){
        this.level = level;
    }

    @Override
    protected void write(String message) {
        System.out.println("Standard Console::Logger: " + message);
    }
}

public class ErrorLogger extends AbstractLogger {
    public ErrorLogger(int level){
        this.level = level;
    }

    @Override
    protected void write(String message) {
        System.out.println("Error Console::Logger: " + message);
    }
}

public class FileLogger extends AbstractLogger {
    public FileLogger(int level){
        this.level = level;
    }

    @Override
    protected void write(String message) {
        System.out.println("File::Logger: " + message);
    }
}

public class ChainPatternDemo {
    private static AbstractLogger getChainOfLoggers(){

        AbstractLogger errorLogger = new ErrorLogger(AbstractLogger.ERROR);
        AbstractLogger fileLogger = new FileLogger(AbstractLogger.DEBUG);
        AbstractLogger consoleLogger = new ConsoleLogger(AbstractLogger.INFO);

        errorLogger.setNextLogger(fileLogger);
        fileLogger.setNextLogger(consoleLogger);

        return errorLogger;
    }

    public static void main(String[] args) {
        AbstractLogger loggerChain = getChainOfLoggers();

        loggerChain.logMessage(AbstractLogger.INFO,
                "This is an information.");

        loggerChain.logMessage(AbstractLogger.DEBUG,
                "This is an debug level information.");

        loggerChain.logMessage(AbstractLogger.ERROR,
                "This is an error information.");
    }
}

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