Examples of org.hibernate.Session.refresh()

org.hibernate.Session.refresh()
Re-read the state of the given instance from the underlying database. It is inadvisable to use this to implement long-running sessions that span many business tasks. This method is, however, useful in certain special circumstances. For example
- where a database trigger alters the object state upon insert or update
- after executing direct SQL (eg. a mass update) in the same session
- after inserting a Blob or Clob
@param object a persistent or detached instance @throws HibernateException

    t = s.beginTransaction();
    s.setDefaultReadOnly( true );
    dp = ( DataPoint ) s.load( DataPoint.class, dp.getId() );
    assertTrue( s.isReadOnly( dp ) );
    assertFalse( Hibernate.isInitialized( dp ) );
    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );
    assertTrue( s.isReadOnly( dp ) );
    s.setDefaultReadOnly( false );
    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );

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    assertFalse( Hibernate.isInitialized( dp ) );
    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );
    assertTrue( s.isReadOnly( dp ) );
    s.setDefaultReadOnly( false );
    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );
    assertTrue( s.isReadOnly( dp ) );
    assertEquals( "original", dp.getDescription() );
    assertTrue( Hibernate.isInitialized( dp ) );
    dp.setDescription( "changed" );

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    assertTrue( Hibernate.isInitialized( dp ) );
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );
    assertTrue( s.isReadOnly( dp ) );
    assertTrue( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    s.refresh( dp );
    assertEquals( "original", dp.getDescription() );
    assertTrue( s.isReadOnly( dp ) );
    assertTrue( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    s.setDefaultReadOnly( true );
    dp.setDescription( "changed" );

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    assertTrue( s.isReadOnly( dp ) );
    assertTrue( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    s.setDefaultReadOnly( true );
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );
    s.refresh( dp );
    assertTrue( s.isReadOnly( dp ) );
    assertTrue( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    assertEquals( "original", dp.getDescription() );
    dp.setDescription( "changed" );
    t.commit();

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    s.setDefaultReadOnly( true );
    dp = ( DataPoint ) s.load( DataPoint.class, dp.getId() );
    assertFalse( Hibernate.isInitialized( dp ) );
    assertTrue( s.isReadOnly( dp ) );
    s.evict( dp );
    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );
    s.setDefaultReadOnly( false );
    assertTrue( s.isReadOnly( dp ) );
    s.evict( dp );
    s.refresh( dp );

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    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );
    s.setDefaultReadOnly( false );
    assertTrue( s.isReadOnly( dp ) );
    s.evict( dp );
    s.refresh( dp );
    assertFalse( Hibernate.isInitialized( dp ) );
    assertFalse( s.isReadOnly( dp ) );
    assertFalse( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );

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    assertFalse( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );
    assertTrue( Hibernate.isInitialized( dp ) );
    s.evict( dp );
    s.refresh( dp );
    assertEquals( "original", dp.getDescription() );
    assertFalse( s.isReadOnly( dp ) );
    assertFalse( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );

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    assertFalse( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );
    s.setDefaultReadOnly( true );
    s.evict( dp );
    s.refresh( dp );
    assertEquals( "original", dp.getDescription() );
    assertTrue( s.isReadOnly( dp ) );
    assertTrue( s.isReadOnly( ( ( HibernateProxy ) dp ).getHibernateLazyInitializer().getImplementation() ) );    
    dp.setDescription( "changed" );
    assertEquals( "changed", dp.getDescription() );

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    customer.setName( "other" );
    session.flush();
    assertFalse( "should-be-proxy was initialized", Hibernate.isInitialized( customer.getCompany() ) );


    session.refresh( customer );
    assertEquals( "name not updated", "other", customer.getName() );
    assertEquals( "company association not correct", "acme", customer.getCompany().getName() );


    session.getTransaction().commit();
    session.close();

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    customer.setName( "Steve" );
    session = openSession();
    session.beginTransaction();
    session.update( customer );
    session.flush();
    session.refresh( customer );
    assertEquals( "name not updated", "Steve", customer.getName() );
    session.getTransaction().commit();
    session.close();


    // Test querying

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