Persisting a domain model with JDO 2.0 - POJOs in Action: Developing Enterprise Applications with Lightweight Frameworks - page 169

F Updates
PendingOrder's line items

private void updateQuantities() {
doWithTransaction(new TxnCallback() {
public void execute() throws Exception {
PendingOrder po = loadPendingOrder();
po.updateQuantities(new int[] { 1, 2 });
}
});
}

G Changes
PendingOrder's line items

private void changeQuantities() {
doWithTransaction(new TxnCallback() {
public void execute() throws Exception {
PendingOrder po = loadPendingOrder();
po.updateQuantities(new int[] { 0, 2 });
}
});
}

H Deletes
PendingOrder

private void deletePendingOrder() {
doWithTransaction(new TxnCallback() {
public void execute() throws Exception {
PendingOrder po = loadPendingOrder();
deletePersistent(po);
}

});
}

}

The testPendingOrder() method calls several helper methods that implement
the steps of the test. Let's look at the details:
The createPendingOrder() method creates a PendingOrder and persists it.
The createRestaurant() method creates and saves a Restaurant , which is
used by the test.

B
C

D

The updateDeliveryInformation() method loads PendingOrder and calls
PendingOrder.updateDeliveryInfo() .
The updateRestaurant() method loads PendingOrder and the Restaurant
that was created earlier and calls PendingOrder.updateRestaurant() , which
creates an association from the PendingOrder to the Restaurant .
The updateQuantities() method calls PendingOrder.updateQuantities() ,
which creates line items.

E

F