Portfolio


// Book.java
public class Book{

		@Convert(converter=BookStatusConverter.class)
		private BookStatus status;
}

//BookStatus.java
@Data
public class BookStatus {
    private long code;
    private String description;

    public boolean isDisplayed(){
        return code == 200;
    }

    public BookStatus(long code){
        this.code = code;
        this.description = parseDescription(code);
    }

    public String parseDescription(long code){
        switch((int) code){
            case 100:
                return "판매종료";
            case 200:
                return "판매중";
            case 300:
                return "판매보류";
            default:
                return "미지원";
        }

    }
}

// BookStatusConverter.java
@Converter // jpa에서 사용하는 converter (autoApply = true) 가 적용되면
// BookStatus가 선언된 필드는 다 적용해줌
public class BookStatusConverter implements AttributeConverter<BookStatus, Long> {
    @Override
    public Long convertToDatabaseColumn(BookStatus attribute) {
        return attribute.getCode();
    }

    @Override
    public BookStatus convertToEntityAttribute(Long dbData) {
        return dbData != null? new BookStatus(dbData) : null;
    }
}


public class BookStatusConverter implements AttributeConverter<BookStatus, Long> {
    @Override
    public Long convertToDatabaseColumn(BookStatus attribute) {
//        return attribute.getCode();
        return null;
    }

    @Override
    public BookStatus convertToEntityAttribute(Long dbData) {
        return dbData != null? new BookStatus(dbData) : null;
    }
}

@Transactional
public List<Book> getAll(){
    List<Book> books = bookRepository.findAll();
    books.forEach(System.out::println);
    return books;
}

@Test
void converterErrorTest(){
    bookService.getAll();

    bookRepository.findAll().forEach(System.out::println);
}

Converter

Converter(Entity ↔ db 값 변환)

@Converter(autoApply=true)

Converter 사용 시 주의할 점