TIL) ResponseEntity와 Custom Exception

@AllArgsConstructor
@Getter
public enum ErrorCode {
	INVALID_AUTH(HttpStatus.UNAUTHORIZED, "비밀번호가 일치하지 않습니다."),
	BOARD_NOT_FOUND(HttpStatus.NOT_FOUND, "게시글이 존재하지 않습니다."),
	;

	private final HttpStatus httpStatus;
	private final String message;

}

@AllArgsConstructor
@Getter
public class CustomException extends RuntimeException{
	ErrorCode errorCode;
}

@ControllerAdvice
public class CustomExceptionHandler {

	@ExceptionHandler(CustomException.class)
	public ResponseEntity<ErrorResponseEntity> handleCustomException(CustomException e){
		return ErrorResponseEntity.toResponseEntity(e.getErrorCode());
	}
}

@Data
@Builder
public class ErrorResponseEntity {
    private int status;
    private String name;
    private String message;

    public static ResponseEntity<ErrorResponseEntity> toResponseEntity(ErrorCode e){
        return ResponseEntity
                .status(e.getHttpStatus())
                .body(ErrorResponseEntity.builder()
	              		.status(e.getHttpStatus().value())
	                  .name(e.name())
	                  .message(e.getMessage())
	                  .build());
    }
}

private Board getBoardById(long id) {
	return boardRepository.findById(id).orElseThrow(() -> new CustomException(StatusEnum.BOARD_NOT_FOUND));
}

// 비밀 번호 일치 여부 확인
private void passwordCheck(Board board, String inputPassword) {
	if (!board.getPassword().equals(inputPassword)) {
		throw new CustomException(StatusEnum.PASSWORD_NOT_MATCHED);
	}
}