/** The union of an OclSet and an OclBag is an OclBag. */
public OclBag union(OclBag bag) {
if (isUndefined()) return new OclBag(0, getUndefinedReason());
if (bag.isUndefined()) return bag;
ArrayList list = new ArrayList(collection.size() + bag.collection.size());
list.addAll(collection);
list.addAll(bag.collection);
return new OclBag(list);
}
/**
* @return an OclSet containing all elements found both in this OclSet and in the OclBag given as
* parameter
*/
public OclSet intersection(OclBag bag) {
if (isUndefined()) return this;
if (bag.isUndefined()) return new OclSet(0, bag.getUndefinedReason());
Set set = intersection(bag.collection);
return new OclSet(set);
}