This topic applies to Java version only
Replicating a Set of objects is simple and is similar to the List example.
1package f1.collection.set; 2
3
import java.util.Set; 4
5
public class Pilot { 6
String name; 7
Set cars; 8
}
Use the set tag.
01<?xml version="1.0"?> 02
03
<!DOCTYPE hibernate-mapping PUBLIC 04
"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 05
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 06
07
<hibernate-mapping default-access="field" default-lazy="false" default-cascade="save-update"> 08
<class name="f1.collection.set.Pilot"> 09
<id column="typed_id" type="long"> 10
<generator class="native"/> 11
</id> 12
13
<property name="name"/> 14
15
<set name="cars" table="cars"> 16
<key column="pilotId"/> 17
<one-to-many class="f1.collection.Car"/> 18
</set> 19
</class> 20
</hibernate-mapping>
Do the replication.
01public class SetExample { 02
public static void main(String[] args) { 03
new File("SetExample.yap").delete(); 04
05
System.out.println("Running Set example."); 06
07
ExtDb4o.configure().generateUUIDs(Integer.MAX_VALUE); 08
ExtDb4o.configure().generateVersionNumbers(Integer.MAX_VALUE); 09
10
ObjectContainer objectContainer = Db4o.openFile("SetExample.yap"); 11
12
Pilot pilot = new Pilot(); 13
pilot.name = "John"; 14
15
Car car1 = new Car(); 16
car1.brand = "BMW"; 17
car1.model = "M3"; 18
19
Car car2 = new Car(); 20
car2.brand = "Mercedes Benz"; 21
car2.model = "S600SL"; 22
23
pilot.cars = new HashSet(); 24
pilot.cars.add(car1); 25
pilot.cars.add(car2); 26
27
objectContainer.set(pilot); 28
objectContainer.commit(); 29
30
Configuration config = new Configuration().configure("f1/collection/set/hibernate.cfg.xml"); 31
32
ReplicationSession replication = HibernateReplication.begin(objectContainer, config); 33
ObjectSet changed = replication.providerA().objectsChangedSinceLastReplication(); 34
35
while (changed.hasNext()) 36
replication.replicate(changed.next()); 37
38
replication.commit(); 39
replication.close(); 40
objectContainer.close(); 41
42
new File("SetExample.yap").delete(); 43
}