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

        database.remove(database.load(ProductDetail.class, new Integer(10)));
        database.commit();
        
        database.begin();
        try {
            laptop = (Laptop) database.load(Laptop.class, new Integer(10));
            fail("Laptop with id 10 still exists.");
        } catch (ObjectNotFoundException e) {
           assertEquals("The object of type ctf.jdo.tc9x.Laptop with identity <10(10)> " 
                   + "was not found in persistent storage", e.getMessage());
        }

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    public void testLoadLaptopMulti() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        LaptopMulti laptop = (LaptopMulti) database.load(LaptopMulti.class,
                new Identity(new Integer (1), new Integer(1)));
        database.commit();
        
        assertNotNull(laptop);
        assertEquals("ctf.jdo.tc9x.LaptopMulti", laptop.getClass().getName());

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    public void testLoadServer() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Server server = (Server) database.load(Server.class, new Integer(3));
        database.commit();
        
        assertNotNull(server);
        assertEquals("ctf.jdo.tc9x.Server", server.getClass().getName());
        assertEquals(3, server.getId());

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    public void testLoadServerMulti() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        ServerMulti server = (ServerMulti) database.load(ServerMulti.class,
                new Identity(new Integer(3), new Integer(3)));
        database.commit();
        
        assertNotNull(server);
        assertEquals("ctf.jdo.tc9x.ServerMulti", server.getClass().getName());

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    public void testLoadComputer() throws Exception {
        Database database = _category.getDatabase();
        
        database.begin();
        Computer computer = (Computer) database.load(Computer.class, new Integer(2));
        database.commit();
        
        assertNotNull(computer);
        assertEquals("ctf.jdo.tc9x.Laptop", computer.getClass().getName());
        assertEquals(2, computer.getId());

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        long result = System.currentTimeMillis();
        
        int count = 0;
        while (results.hasMore()) {
            OID oid = (OID) results.next();
            db.load(Service.class, oid.getId());
            count++;
        }
        
        long iterate = System.currentTimeMillis();

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        long result = System.currentTimeMillis();
        
        int count = 0;
        while (results.hasMore()) {
            OID oid = (OID) results.next();
            db.load(Service.class, oid.getId());
            count++;
        }
        
        long iterate = System.currentTimeMillis();

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        laptop.setName("laptop 12");
        laptop.setCpu("centrino");
        laptop.setResolution("1600");
        laptop.setWeight(2450);
        laptop.setDetail((ProductDetail) 
                database.load(ProductDetail.class, new Integer(12)));
        database.create(laptop);
        Collection orders = new LinkedList();
        orders.add(database.load(Order.class, new Integer(12)));
        laptop.setOrders(orders);
        database.commit();

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        laptop.setWeight(2450);
        laptop.setDetail((ProductDetail) 
                database.load(ProductDetail.class, new Integer(12)));
        database.create(laptop);
        Collection orders = new LinkedList();
        orders.add(database.load(Order.class, new Integer(12)));
        laptop.setOrders(orders);
        database.commit();


        database.begin();
        Computer computer = (Computer) database.load(Computer.class, new Integer(12));

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        orders.add(database.load(Order.class, new Integer(12)));
        laptop.setOrders(orders);
        database.commit();


        database.begin();
        Computer computer = (Computer) database.load(Computer.class, new Integer(12));
        database.commit();
        
        assertNotNull(computer);
        assertEquals("ctf.jdo.tc9x.Laptop", computer.getClass().getName());
        assertEquals(12, computer.getId());

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