Last active
August 27, 2023 23:08
-
-
Save trvswgnr/b8d6ea74f70332d5fe135844bf5560c2 to your computer and use it in GitHub Desktop.
left-pad for enterprise
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
interface Logger { | |
void error(String message, Throwable t); | |
} | |
class ConsoleLogger implements Logger { | |
private final String className; | |
ConsoleLogger(String className) { | |
this.className = className; | |
} | |
@Override | |
public void error(String message, Throwable t) { | |
System.err.println("ERROR: " + className + ": " + message); | |
t.printStackTrace(System.err); | |
} | |
} | |
interface PaddingService { | |
String pad(String input, int length, char padChar); | |
} | |
class LeftPaddingService implements PaddingService { | |
private static final Logger logger = new ConsoleLogger(LeftPaddingService.class.getName()); | |
@Override | |
public String pad(String input, int length, char padChar) { | |
StringBuffer sb = new StringBuffer(); | |
try { | |
while (sb.length() < length - input.length()) { | |
sb.append(padChar); | |
} | |
sb.append(input); | |
} catch (Exception e) { | |
logger.error("Error occurred while padding", e); | |
throw e; | |
} | |
return sb.toString(); | |
} | |
} | |
enum PaddingStrategy { | |
LEFT, | |
} | |
interface PaddingServiceFactory { | |
PaddingService createPaddingService(PaddingStrategy strategy); | |
} | |
class PrimaryPaddingServiceFactory implements PaddingServiceFactory { | |
@Override | |
public PaddingService createPaddingService(PaddingStrategy strategy) { | |
switch (strategy) { | |
case LEFT: | |
return new LeftPaddingService(); | |
default: | |
throw new IllegalArgumentException("Invalid padding strategy: " + strategy); | |
} | |
} | |
} | |
interface PaddingServiceAdapter { | |
String pad(String input, int length, char padChar); | |
} | |
class PrimaryPaddingServiceAdapter implements PaddingServiceAdapter { | |
private final PaddingService paddingService; | |
PrimaryPaddingServiceAdapter(PaddingService paddingService) { | |
this.paddingService = paddingService; | |
} | |
@Override | |
public String pad(String input, int length, char padChar) { | |
if (input.length() >= length) { | |
return input; | |
} | |
return paddingService.pad(input, length, padChar); | |
} | |
} | |
interface PresentationService { | |
void display(String data); | |
} | |
class ConsolePresentationService implements PresentationService { | |
@Override | |
public void display(String data) { | |
System.out.println(data); | |
} | |
} | |
class LeftPad { | |
private final PaddingServiceAdapter paddingServiceAdapter; | |
LeftPad(PaddingServiceAdapter paddingServiceAdapter) { | |
this.paddingServiceAdapter = paddingServiceAdapter; | |
} | |
String padString(String input, int length, char padChar) { | |
return paddingServiceAdapter.pad(input, length, padChar); | |
} | |
} | |
public class Main { | |
public static void main(String[] args) { | |
PaddingServiceFactory paddingServiceFactory = new PrimaryPaddingServiceFactory(); | |
PaddingService paddingService = paddingServiceFactory.createPaddingService(PaddingStrategy.LEFT); | |
PaddingServiceAdapter paddingServiceAdapter = new PrimaryPaddingServiceAdapter(paddingService); | |
PresentationService presentationService = new ConsolePresentationService(); | |
LeftPad leftPad = new LeftPad(paddingServiceAdapter); | |
String paddedString = leftPad.padString("tr4vvyr00lz", 20, '@'); | |
presentationService.display(paddedString); | |
} | |
} |
This refactor offends me
Damn
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
lmfaooooo