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I am missing a basic validator that allows a property to be optional ({{null}} is valid) but if its value is set it must not be an empty {{String}} (trimmed). In my opinion this is some of the most used cases. I dont want my optional columns to be possible cluttered with empty strings.
Basically this simple validator:
{code}
public class NullOrNotBlankValidator implements ConstraintValidator<NullOrNotBlank, String>
{
@Override
public void initialize(final NullOrNotBlank constraintAnnotation){}
@Override
public boolean isValid(final String value, final ConstraintValidatorContext context)
{
return value == null || !value.trim().isEmpty();
}
}
{code}
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