package org.baeldung.validation; import javax.validation.Constraint; import javax.validation.Payload; import java.lang.annotation.Documented; import java.lang.annotation.Retention; import java.lang.annotation.Target; import static java.lang.annotation.ElementType.FIELD; import static java.lang.annotation.ElementType.ANNOTATION_TYPE; import static java.lang.annotation.ElementType.TYPE; import static java.lang.annotation.RetentionPolicy.RUNTIME; @Target({ TYPE, FIELD, ANNOTATION_TYPE }) @Retention(RUNTIME) @Constraint(validatedBy = EmailValidator.class) @Documented public @interface ValidEmail { String message() default "Invalid Email"; Class[]groups() default {}; Class[]payload() default {}; }