There is a form for which the phone number is sometimes required and sometimes it is not and the form is validated by validator class that spring calls. I would like that validator class to know if when the field is required and when it is ok if it's empty, but I am not sure about the correct approach to implement this. The controller and validation process looks like this:
@RequestMapping(value = "my/url", method = RequestMethod.POST)
public ModelAndView someMethod(@Valid T myForm, BindingResult bindingResult) {
//Calling the validation...
if (bindingResult.hasErrors()) {
// didn't pass validation
} else {
// is ok!
}
}
The form looks like this. The idea isI could add another field that would determine if phone number is required or not, if I would find a way to use it later when validating phone field. It has the @Phone annotation:
public class MyForm implements Serializable {
private static final long serialVersionUID = 1L;
@Phone
private String phone;
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
The @Phone annotation specifies a class that will validate the data
@Target({CONSTRUCTOR, FIELD, METHOD, PARAMETER})
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = ValidateField.class)
public @interface Phone {
String message() default "{default.phone.errormsg}";
int maxLength() default 64;
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
Here is where the problem starts. The class that validates data looks like this and the thing is that I would like to be able to check if the phone is required this time or not in this form, but I don't see any way to pass other form fields in this class other than the phone number value and I can't access form object here anyway:
public class PhoneValidator implements ConstraintValidator<Phone, String> {
//...
@Override
public boolean isValid(String value, ConstraintValidatorContext context) {
// I want to check if the "required" field was passed from form here
// to know if it's ok for the field to be empty
if (StringUtils.isEmpty(value) /* && isNotRequired */) {
return true;
}
return notBlank(value, context)
&& maxLength(value, context, maxLength) /* and other constraints... */;
}
//...
}
I am new Spring validation stuff and I am not even sure if I am going in the right direction, I would be thank full if someone could guide me to a proper way of solving this issue.
