Hibernate Field List

Hibernate Field List

Entity:::

....
@Column
@Convert(converter = StringToListFlagConverter.class)
private List<FlagChave> flags= new ArrayList();
....
Class Converter.

@Converter
public class StringToListFlagConverter implements AttributeConverter<List<FlagChave>, String> {

  @Override
  public String convertToDatabaseColumn(List<FlagChave> flagChaves) {
      if(!Optional.ofNullable(flagChaves).isPresent()) return "";
      return flagChaves.stream().map(FlagChave::toString).collect(Collectors.joining(","));
  }

  @Override
  public List<FlagChave> convertToEntityAttribute(String joined) {
      if(!Optional.ofNullable(joined).filter(s -> !s.isEmpty()).isPresent()) return new ArrayList<>();
      return
              Arrays.asList(
                      joined.split(","))
                      .stream()
                      .map(FlagChave::valueOf).collect(toCollection(ArrayList::new)
              );
  }
}

Class enum. I was created with an enum, but you can do with a String.

 public enum FlagChave {
  CHAVE,
  VALOR_PADRAO,
  CONDENSAR_LINHAS;

  @Override
  public String toString() {
      return super.toString();
  }
}