Email.java

package com.example.client.shared;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import javax.validation.Constraint;
import javax.validation.Payload;

/**
 * An Email validator with the same semantics as the built-in Hibernate email
 * validator, but uses a validation implementation that works on both the client
 * side and the server side.
 *
 * @author Jonathan Fuerth <jfuerth@redhat.com>
 * @author Christian Sadilek <csadilek@redhat.com>
 */
@Target( { METHOD, FIELD, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = GwtCompatibleEmailValidator.class)
public @interface Email {
  String message() default "{org.hibernate.validator.constraints.Email.message}";

  Class<?>[] groups() default {};

  Class<? extends Payload>[] payload() default {};

}