Examples of org.exolab.castor.jdo.Database.load()

org.exolab.castor.jdo.Database.load()
Load an object of the specified type and given identity. Once loaded the object is persistent. Calling this method with the same identity in the same transaction will return the same object. This method is equivalent to a query that returns a single object. If the identity spans on more than one field, all of the identity fields can be wrapped in a Complex object. @param type The object's type @param identity The object's identity @return The object instance. @throws ObjectNotFoundException No object of the given type andidentity was found in persistent storage @throws LockNotGrantedException Timeout or deadlock occuredattempting to acquire a lock on the object @throws TransactionNotInProgressException Method called whiletransaction is not in progress @throws PersistenceException An error reported by thepersistence engine

        orders.add(database.load(Order.class, new Integer(11)));
        truck.setOrders(orders);
        database.commit();
        
        database.begin();
        Object object = database.load(Car.class, new Integer(11));
        assertNotNull(object);
        assertEquals("ctf.jdo.tc9x.Truck", object.getClass().getName());
        Truck loadedTruck = (Truck) object; 
        database.commit();

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        assertNotNull(loadedTruck);
        assertEquals(11, loadedTruck.getId());
        
        database.begin();
        database.remove(database.load (Car.class, new Integer(11)));
        database.remove(database.load (ProductDetail.class, new Integer(11)));
        database.remove(database.load(Order.class, new Integer(11)));
        database.commit();
        
        database.close();

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        assertNotNull(loadedTruck);
        assertEquals(11, loadedTruck.getId());
        
        database.begin();
        database.remove(database.load (Car.class, new Integer(11)));
        database.remove(database.load (ProductDetail.class, new Integer(11)));
        database.remove(database.load(Order.class, new Integer(11)));
        database.commit();
        
        database.close();
    }

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        assertEquals(11, loadedTruck.getId());
        
        database.begin();
        database.remove(database.load (Car.class, new Integer(11)));
        database.remove(database.load (ProductDetail.class, new Integer(11)));
        database.remove(database.load(Order.class, new Integer(11)));
        database.commit();
        
        database.close();
    }

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    public void testLoadOwner() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Owner owner = (Owner) database.load(Owner.class, new Integer(1));
        database.commit();
        
        assertNotNull(owner);
        assertEquals(1, owner.getId().intValue());
        assertEquals("owner 1", owner.getName());

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    public void testLoadM() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        M m = (M) database.load(M.class, new Integer(1));
        database.commit();
        
        assertNotNull(m);
        assertEquals(1, m.getId());
        assertEquals("m1", m.getName());

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        // load created product
        database = _category.getDatabase();
        database.begin();
        
        Product pl1 = new Product(1, "LCD", KindEnum.MONITOR);
        Product pl2 = (Product) database.load(Product.class, new Integer(1));
        assertEquals(pl1, pl2);


        database.commit();
        database.close();

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        // update product
        database = _category.getDatabase();
        database.begin();
        
        Product pu = (Product) database.load(Product.class, new Integer(1));
        pu.setName("Laser");
        pu.setKind(KindEnum.PRINTER);


        database.commit();
        database.close();

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        // load updated product
        database = _category.getDatabase();
        database.begin();
        
        Product pl3 = new Product(1, "Laser", KindEnum.PRINTER);
        Product pl4 = (Product) database.load(Product.class, new Integer(1));
        assertEquals(pl3, pl4);


        database.commit();
        database.close();

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        // delete product
        database = _category.getDatabase();
        database.begin();
        
        Product pd = (Product) database.load(Product.class, new Integer(1));
        database.remove(pd);


        database.commit();
        database.close();
    }

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