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@Entity

@Table(name="VALIDATION_PERSON")

public class Person {

    @Id @GeneratedValue

    private int id;

    

    @Column(name="FIRST_NAME", length=12, nullable=false)

    @ValidName(min=1, max=12, regexp="^[a-zA-Z\\ \\-]+$", message="invalid first name")

    private String firstName;

    

    @Column(name="LAST_NAME", length=20, nullable=false)

    @ValidName(min=1, max=20, regexp="^[a-zA-Z\\ \\-]+$", message="invalid last name")

    private String lastName;

    

    @Temporal(TemporalType.DATE)

    @NotNull(groups={Drivers.class, POCs.class})

    @Past(groups=Drivers.class)

    @MinAge.List({

        @MinAge(age=18, groups=POCs.class),

        @MinAge(age=16, groups=Drivers.class)

    })

    private Date birthDate;

    

    @Column(name="EMAIL", length=50)

    @NotNull(groups=POCs.class)

    @Size(min=7,max=50)

    @Pattern(regexp="^.+@.+\\..+$")

    private String email;

...

<?xml version="1.0" encoding="UTF-8"?>

<persistence ...



    <persistence-unit name="jpa-validation-example-test">

        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>



        <validation-mode>AUTO</validation-mode>

        <properties>

            <property name="javax.persistence.validation.group.pre-persist" 

                      value="ejava.jpa.example.validation.Drivers"/>

            <property name="javax.persistence.validation.group.pre-update" 

                      value="ejava.jpa.example.validation.Drivers"/>

        </properties>

    </persistence-unit>            

</persistence>

Person p = new Person()

    .setFirstName("Bob")

    .setLastName("Smith")

    .setBirthDate(new Date());

try {

    em.persist(p);

} catch (ConstraintViolationException ex) {

    logger.info("caught expected exception:" + ex);

}

 -caught expected exception:javax.validation.ConstraintViolationException: 
     Validation failed for classes [ejava.jpa.example.validation.Person] 
     during persist time for groups [ejava.jpa.example.validation.Drivers, ]
List of constraint violations:[
    ConstraintViolationImpl{
        interpolatedMessage='too young', 
        propertyPath=birthDate, 
        rootBeanClass=class ejava.jpa.example.validation.Person, 
        messageTemplate='too young'}
    ConstraintViolationImpl{
        interpolatedMessage='0 is younger than minimum 16', 
        propertyPath=birthDate, 
        rootBeanClass=class ejava.jpa.example.validation.Person, 
        messageTemplate='0 is younger than minimum 16'}
]

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