public boolean add(Object o) {
getterCalled();
boolean changed = wrappedSet.add(o);
if (changed)
fireSetChange(Diffs.createSetDiff(Collections.singleton(o), Collections.EMPTY_SET));
return changed;
}
public void clear() {
getterCalled();
if (!wrappedSet.isEmpty()) {
Set removals = wrappedSet;
wrappedSet = new IdentitySet();
fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removals));
}
}
public boolean addAll(Collection c) {
getterCalled();
Set additions = new IdentitySet();
for (Iterator iterator = c.iterator(); iterator.hasNext(); ) {
Object element = iterator.next();
if (wrappedSet.add(element)) additions.add(element);
}
boolean changed = !additions.isEmpty();
if (changed) fireSetChange(Diffs.createSetDiff(additions, Collections.EMPTY_SET));
return changed;
}
public boolean removeAll(Collection c) {
getterCalled();
Set removals = new IdentitySet();
for (Iterator iterator = c.iterator(); iterator.hasNext(); ) {
Object element = iterator.next();
if (wrappedSet.remove(element)) removals.add(element);
}
boolean changed = !removals.isEmpty();
if (changed) fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removals));
return changed;
}
public boolean retainAll(Collection c) {
getterCalled();
Set removals = new IdentitySet();
Object[] toRetain = c.toArray();
outer:
for (Iterator iterator = wrappedSet.iterator(); iterator.hasNext(); ) {
Object element = iterator.next();
// Cannot rely on c.contains(element) because we must compare
// elements using IElementComparer.
for (int i = 0; i < toRetain.length; i++) {
if (element == toRetain[i]) continue outer;
}
iterator.remove();
removals.add(element);
}
boolean changed = !removals.isEmpty();
if (changed) fireSetChange(Diffs.createSetDiff(Collections.EMPTY_SET, removals));
return changed;
}
