Session s = openSession();
Transaction t = s.beginTransaction();
Person p = new Person();
p.setName("Steve");
p.setUserId("steve");
Address a = new Address();
a.setAddress("Texas");
a.setCountry("USA");
p.setAddress(a);
a.setPerson(p);
s.save(p);
Person p2 = new Person();
p2.setName("Max");
p2.setUserId("max");
s.save(p2);
Account act = new Account();
act.setType('c");
act.setUser(p2);
p2.getAccounts().add(act);
s.save(act);
s.flush();
s.clear();
p = (Person) s.get( Person.class, p.getId() ); //get address reference by outer join
p2 = (Person) s.get( Person.class, p2.getId() ); //get null address reference by outer join
assertNull( p2.getAddress() );
assertNotNull( p.getAddress() );
List l = s.createQuery("from Person").list(); //pull address references for cache
assertEquals( l.size(), 2 );
assertTrue( l.contains(p) && l.contains(p2) );
s.clear();
l = s.createQuery("from Person p order by p.name").list(); //get address references by sequential selects
assertEquals( l.size(), 2 );
assertNull( ( (Person) l.get(0) ).getAddress() );
assertNotNull( ( (Person) l.get(1) ).getAddress() );
s.clear();
l = s.createQuery("from Person p left join fetch p.address a order by a.country").list(); //get em by outer join
assertEquals( l.size(), 2 );
if ( ( (Person) l.get(0) ).getName().equals("Max") ) {
assertNull( ( (Person) l.get(0) ).getAddress() );
assertNotNull( ( (Person) l.get(1) ).getAddress() );
}
else {
assertNull( ( (Person) l.get(1) ).getAddress() );
assertNotNull( ( (Person) l.get(0) ).getAddress() );
}
s.clear();
l = s.createQuery("from Person p left join p.accounts").list();
for ( int i=0; i<2; i++ ) {
Object[] row = (Object[]) l.get(i);
Person px = (Person) row[0];
Set accounts = px.getAccounts();
assertFalse( Hibernate.isInitialized(accounts) );
assertTrue( px.getAccounts().size()>0 || row[1]==null );
}
s.clear();
l = s.createQuery("from Person p left join fetch p.accounts a order by p.name").list();
Person p0 = (Person) l.get(0);
assertTrue( Hibernate.isInitialized( p0.getAccounts() ) );
assertEquals( p0.getAccounts().size(), 1 );
assertSame( ( (Account) p0.getAccounts().iterator().next() ).getUser(), p0 );
Person p1 = (Person) l.get(1);
assertTrue( Hibernate.isInitialized( p1.getAccounts() ) );
assertEquals( p1.getAccounts().size(), 0 );
s.clear();
l = s.createQuery("from Account a join fetch a.user").list();
s.clear();
l = s.createQuery("from Person p left join fetch p.address").list();
s.clear();
s.createQuery( "delete Address" ).executeUpdate();
s.createQuery( "delete Account" ).executeUpdate();
s.createQuery( "delete Person" ).executeUpdate();
t.commit();
s.close();
