Hi David, after some testing I wanted to provide you with some updates based
on some scenarios I ran into.
You'll notice in the !request.isHXR condition, I'm checking for a null
lineItem id. This prevents duplicate objects from being added to the
collection.
@SuppressWarnings("unchecked")
public ValueEncoder getEncoderLineItem() {
return new ValueEncoder<LineItem>() {
public String toClient(LineItem value) {
Long id = value.getId();
return id == null ? NEW_OBJ : id.toString();
}
public LineItem toValue(String idAsString) {
lineItem = null;
if (!idAsString.equals(NEW_OBJ)) {
Long id = new Long(idAsString);
lineItem = (LineItem) session.get(LineItem.class, id);
}
// AjaxFormLoop can't handle null obj, so if null we return
a new empty obj.
lineItem = lineItem == null ? new LineItem() : lineItem;
if (!request.isXHR() && lineItem.getId() == null) {
lineItem.setPurchaseRequest(pr);
pr.getLineItems().add(lineItem);
}
return lineItem;
}
};
}
I also found a cleaner way to copy the persisted data to the new session.
void onActivate() {
System.out.println("onActivate " + this.pr);
if (this.pr == null) {
this.pr = prPersist != null ? prPersist : new PurchaseRequest();
prPersist = null;
}
}
Class<?> onActivate(Long prId) {
PurchaseRequest purchaseRequest = prPersist != null ? prPersist :
(PurchaseRequest) session.get(PurchaseRequest.class, prId);
}
If you have any better solutions, please feel free to share.
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