How can we use either of the validation in spring boot?

user_8705653 0
Viewed 756

I have two variables in my bean and I want either name or mobile to be filled, they cant be both null at the same time.

@NotNull
private String name;

@NotNull
private String mobile;

How can I achieve that?

validation jpa spring mysql java
2 Answers

You need to write a custom annotation for this and use on class

@AtLeastOneNotEmpty(fields = {"name", "phone"})
public class User{

Custom Annotation Implementation

@Constraint(validatedBy = AtLeastOneNotEmptyValidator.class)
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface AtLeastOneNotEmpty {

  String message() default "At least one cannot be null";

  String[] fields();

  Class<?>[] groups() default {};

  Class<? extends Payload>[] payload() default {};
}

And Validator of Custom Annotation

public class AtLeastOneNotEmptyValidator
    implements ConstraintValidator<AtLeastOneNotEmpty, Object> {

  private String[] fields;

  public void initialize(AtLeastOneNotEmpty constraintAnnotation) {
    this.fields = constraintAnnotation.fields();
  }

  public boolean isValid(Object value, ConstraintValidatorContext context) {

    List<String> fieldValues = new ArrayList<String>();

    for (String field : fields) {
      Object propertyValue = new BeanWrapperImpl(value).getPropertyValue(field);
      if (ObjectUtils.isEmpty(propertyValue)) {
        fieldValues.add(null);
      } else {
        fieldValues.add(propertyValue.toString());
      }
    }
    return fieldValues.stream().anyMatch(fieldValue -> fieldValue!= null);
  }
}
user_42073060

you can create your own validation or annotation try like this :

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface NotNullConfirmed {
    String message() default "they can not be null";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
}

and class that implement it:

   public class FieldConfirmedValidator implements ConstraintValidator<NotNullConfirmed, Object>{
    @Override
    public boolean isValid(Object user, ConstraintValidatorContext context) {
        String name = ((Your_bo)user).getName();
        String phone = ((Your_bo)user).getPhone();
        return !name.isEmpty() && !phone.isEmpty();
    }
}

and add this annotation to your class 

@NotNullConfirmed 
public class User{
}
user_109370930
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