public Collection<? extends CanvasObject> getAffected() {
Collection<? extends CanvasObject> ret = affected;
if (ret == null) {
Map<AttributeMapKey, Object> newVals = newValues;
if (newVals != null) {
Set<CanvasObject> keys = new HashSet<CanvasObject>();
for (AttributeMapKey key : newVals.keySet()) {
keys.add(key.getObject());
}
ret = Collections.unmodifiableCollection(keys);
affected = ret;
}
}
return affected;
}
private CanvasModelEvent(
CanvasModel source,
int action,
Map<AttributeMapKey, Object> oldValues,
Map<AttributeMapKey, Object> newValues) {
this(source, action, Collections.<CanvasObject>emptySet());
Set<CanvasObject> affected;
affected = new HashSet<CanvasObject>(newValues.size());
for (AttributeMapKey key : newValues.keySet()) {
affected.add(key.getObject());
}
this.affected = affected;
Map<AttributeMapKey, Object> oldValuesCopy;
oldValuesCopy = new HashMap<AttributeMapKey, Object>(oldValues);
Map<AttributeMapKey, Object> newValuesCopy;
newValuesCopy = new HashMap<AttributeMapKey, Object>(newValues);
this.oldValues = Collections.unmodifiableMap(oldValuesCopy);
this.newValues = Collections.unmodifiableMap(newValuesCopy);
}