CardCollection addCards(
CardCollection oldCards, Iterable<Card> cardsToAdd, TrackableProperty key) {
if (cardsToAdd == null) {
return oldCards;
}
TrackableCollection<CardView> views = get(key);
if (oldCards == null) {
oldCards = new CardCollection();
}
boolean needFlagAsChanged = false;
for (Card c : cardsToAdd) {
if (c != null && oldCards.add(c)) {
if (views == null) {
views = new TrackableCollection<CardView>();
views.add(c.getView());
set(key, views);
} else if (views.add(c.getView())) {
needFlagAsChanged = true;
}
}
}
if (needFlagAsChanged) {
flagAsChanged(key);
}
return oldCards;
}
CardCollection addCard(CardCollection oldCards, Card cardToAdd, TrackableProperty key) {
if (cardToAdd == null) {
return oldCards;
}
if (oldCards == null) {
oldCards = new CardCollection();
}
if (oldCards.add(cardToAdd)) {
TrackableCollection<CardView> views = get(key);
if (views == null) {
views = new TrackableCollection<CardView>();
views.add(cardToAdd.getView());
;
set(key, views);
} else if (views.add(cardToAdd.getView())) {
flagAsChanged(key);
}
}
return oldCards;
}
