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POCreating SpringSource Tool Suite (STS) Hibernate Template
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copied!<p>i've created the Hibernate project using Spring Template Project. Two domain objects, a JUnit test, app-context.xml and the persistence-context.xml were created. Now i noticed this line</p> <blockquote> <p><code><jdbc:embedded-database id="dataSource"></jdbc:embedded-database></code></p> </blockquote> <p>and assume that the following happens</p> <ol> <li>A default HQSL db is used</li> <li><p>The two created models Order.java & Item.java will automatically created in memory tables T_ORDER and T_ITEM and the these will be mapped as per annotations on the objects. Inside the auto created classes one of the test methods is as follows </p> <pre><code>@Test @Transactional public void testSaveAndGet() throws Exception { Session session = sessionFactory.getCurrentSession(); Order order = new Order(); order.getItems().add(new Item()); session.save(order); session.flush(); // Otherwise the query returns the existing order // (and we didn't set the parent in the item)... session.clear(); Order other = (Order) session.get(Order.class, order.getId()); assertEquals(1, other.getItems().size()); assertEquals(other, other.getItems().iterator().next().getOrder()); } </code></pre></li> </ol> <p>Questions ...</p> <ol> <li>Am i correct to think that the in memory tables are created from the domain models (Order/Item), and mapped? Therefore session.flush() synchronize the object to the physical (in memory table)....</li> <li><p>Are these tables auto mapped because if i do the following</p> <pre><code>session.save(order); session.flush(); session.clear(); Order other = (Order) session .createQuery("from T_ORDER where ORDER_ID =: orderid") .setLong("orderid", order.getId()) .uniqueResult(); </code></pre></li> </ol> <p>i get an exception...</p> <pre><code>org.hibernate.hql.ast.[B]QuerySyntaxException[/B]: \ T_ORDER is not mapped [from T_ORDER where ORDER_ID =: orderid] ............ ............ </code></pre> <p>if these tables are not mapped automatically, how is flushing working at the first place?</p>

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