@Documented
@ValidatorClass(PhoneValidator.class)
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface PhoneValid {
   String message() default "{validator.phone}";
}

public class PhoneValidator implements Validator<PhoneValid>, Serializable {
   private static final long serialVersionUID = -1049632944485567414L;
   private Pattern pattern;

   public void initialize(PhoneValid parameter) {
      System.out.println(parameter.message());
      pattern = Pattern
            .compile("^(\\(?\\d\\d\\d\\)?)?( |-|\\.)?\\d\\d\\d( |-|\\.)?\\d{4,4}(( |-|\\.)?[ext\\.]+ ?\\d+)?$");
   }

   public boolean isValid(Object value) {
      if (value == null)
         return true;
      if (!(value instanceof String))
         return false;
      String string = (String) value;
      if (string.length() == 0)
         return true;
      Matcher m = pattern.matcher(string);
      return m.matches();
   }
}

@Column(name="secondary_phone", length=40)
   @PhoneValid
   private String secondaryPhone;