@Test
@Priority(10)
public void initData() {
// Revision 1 - Create indexed entries.
TransactionUtil.doInJPA(
this::entityManagerFactory,
entityManager -> {
Parent p = new Parent(1);
p.addChild(new Child(1, "child1"));
p.addChild(new Child(2, "child2"));
entityManager.persist(p);
p.getChildren().forEach(entityManager::persist);
});
// Revision 2 - remove an indexed entry, resetting positions.
TransactionUtil.doInJPA(
this::entityManagerFactory,
entityManager -> {
final Parent p = entityManager.find(Parent.class, 1);
// should remove child with id 1
p.removeChild(p.getChildren().get(0));
entityManager.merge(p);
});
// Revision 3 - add new indexed entity to reset positions
TransactionUtil.doInJPA(
this::entityManagerFactory,
entityManager -> {
final Parent p = entityManager.find(Parent.class, 1);
// add child with id 3
final Child child = new Child(3, "child3");
p.getChildren().add(0, child);
child.getParents().add(p);
entityManager.persist(child);
entityManager.merge(p);
});
// Revision 4 - remove all children
TransactionUtil.doInJPA(
this::entityManagerFactory,
entityManager -> {
final Parent p = entityManager.find(Parent.class, 1);
while (!p.getChildren().isEmpty()) {
Child child = p.getChildren().get(0);
p.removeChild(child);
entityManager.remove(child);
}
entityManager.merge(p);
});
}
public void removeChild(Child child) {
child.getParents().remove(this);
getChildren().remove(child);
}
public void addChild(Child child) {
child.getParents().add(this);
getChildren().add(child);
}