/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.userguide.associations;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
import org.junit.Test;
import org.jboss.logging.Logger;
import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
/**
* @author Vlad Mihalcea
*/
public class ManyToManyUnidirectionalTest extends BaseEntityManagerFunctionalTestCase {
private static final Logger log = Logger.getLogger( ManyToManyUnidirectionalTest.class );
@Override
protected Class<?>[] getAnnotatedClasses() {
return new Class<?>[] {
Person.class,
Address.class,
};
}
@Test
public void testLifecycle() {
doInJPA( this::entityManagerFactory, entityManager -> {
//tag::associations-many-to-many-unidirectional-lifecycle-example[]
Person person1 = new Person();
Person person2 = new Person();
Address address1 = new Address( "12th Avenue", "12A" );
Address address2 = new Address( "18th Avenue", "18B" );
person1.getAddresses().add( address1 );
person1.getAddresses().add( address2 );
person2.getAddresses().add( address1 );
entityManager.persist( person1 );
entityManager.persist( person2 );
entityManager.flush();
person1.getAddresses().remove( address1 );
//end::associations-many-to-many-unidirectional-lifecycle-example[]
} );
}
@Test
public void testRemove() {
final Long personId = doInJPA( this::entityManagerFactory, entityManager -> {
Person person1 = new Person();
Person person2 = new Person();
Address address1 = new Address( "12th Avenue", "12A" );
Address address2 = new Address( "18th Avenue", "18B" );
person1.getAddresses().add( address1 );
person1.getAddresses().add( address2 );
person2.getAddresses().add( address1 );
entityManager.persist( person1 );
entityManager.persist( person2 );
return person1.id;
} );
doInJPA( this::entityManagerFactory, entityManager -> {
log.info( "Remove" );
//tag::associations-many-to-many-unidirectional-remove-example[]
Person person1 = entityManager.find( Person.class, personId );
entityManager.remove( person1 );
//end::associations-many-to-many-unidirectional-remove-example[]
} );
}
//tag::associations-many-to-many-unidirectional-example[]
@Entity(name = "Person")
public static class Person {
@Id
@GeneratedValue
private Long id;
@ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
private List<Address> addresses = new ArrayList<>();
public Person() {
}
public List<Address> getAddresses() {
return addresses;
}
}
@Entity(name = "Address")
public static class Address {
@Id
@GeneratedValue
private Long id;
private String street;
@Column(name = "`number`")
private String number;
public Address() {
}
public Address(String street, String number) {
this.street = street;
this.number = number;
}
public Long getId() {
return id;
}
public String getStreet() {
return street;
}
public String getNumber() {
return number;
}
}
//end::associations-many-to-many-unidirectional-example[]
}