Java String validation using enum values and annotation

Question

I want to validate a string against a set of values using annotations.

What I want is basically this:

@ValidateString(enumClass=com.co.enum)
String d         


        

Answer 1

This is what I did.

Annotation

public @interface ValidateString {

    String[] acceptedValues();

    String message() default "{uk.dds.ideskos.validator.ValidateString.message}";

    Class[] groups() default { };

    Class[] payload() default { }; 
}

Validation Class

public class StringValidator implements ConstraintValidator{

    private List valueList;

    @Override
    public void initialize(ValidateString constraintAnnotation) {
        valueList = new ArrayList();
        for(String val : constraintAnnotation.acceptedValues()) {
            valueList.add(val.toUpperCase());
        }
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        return valueList.contains(value.toUpperCase());
    }

}

And i used it like

@ValidateString(acceptedValues={"Integer", "String"}, message="Invalid dataType")
String dataType;

Long maxValue;
Long minValue;

Now I need to figure out how to implement conditional check ie. if String then maxValue and minValue should be null or Zero..

Any ideas?