package com.rotanareg.skolan.userManager; import javax.validation.ConstraintValidator; import javax.validation.ConstraintValidatorContext; public class EmailAddressValidator implements ConstraintValidator { @Override public void initialize(ValidEmailAddress constraintAnnotation) { } @Override public boolean isValid(String value, ConstraintValidatorContext context) { return value == null || value.equals("") || value.contains("@"); } }