Spring Data JPA Enum converter

AbstractEnumConverter.java

import javax.persistence.AttributeConverter;

/*
 Base Enum converter for JPA
*/
// @Converter
public abstract class AbstractEnumConverter<T extends Enum<T> & PersistableEnum<E>, E>
    implements AttributeConverter<T, E> {

  private final Class<T> clazz;

  AbstractEnumConverter(Class<T> clazz) {
    this.clazz = clazz;
  }

  @Override
  public E convertToDatabaseColumn(T attribute) {
    return attribute != null ? attribute.getCode() : null;
  }

  @Override
  public T convertToEntityAttribute(E dbData) {
    T[] enums = clazz.getEnumConstants();

    for (T e : enums) {
      if (e.getCode().equals(dbData)) {
        return e;
      }
    }

    throw new UnsupportedOperationException(
        String.format("%s cannot convert to %s enum value.", dbData, clazz));
  }
}

CHALLENGE_LOG.sql

CREATE TABLE CHALLENGE_LOG (
  ACTION NUMBER(1) NOT NULL
);
COMMENT ON COLUMN CHALLENGE_LOG.ACTION IS '0=Send OTP, 1=Verify OTP';

ChallengeAction.java

import lombok.AllArgsConstructor;
import lombok.Getter;

@Getter
@AllArgsConstructor
public enum ChallengeAction implements PersistableEnum<Integer> {
  // 0=Send OTP, 1=Verify OTP
  SEND_OTP(0),
  VERIFY_OTP(1);

  private final Integer code;

  // JPA converter
  @javax.persistence.Converter(autoApply = true)
  public static class Converter extends AbstractEnumConverter<ChallengeAction, Integer> {
    public Converter() {
      super(ChallengeAction.class);
    }
  }
}

ChallengeLog.java

@Entity
@Data
public class ChallengeLog  {

  private ChallengeAction action;

}

PersistableEnum.java

public interface PersistableEnum<T> {
  T getCode();
}