@SuppressWarnings("rawtypes")
@Override
public void visit(Collection collection) {
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
Object o = iterator.next();
if (o instanceof Visitable) ((Visitable) o).accept(this);
else if (o instanceof Collection) visit((Collection) o);
}
}
public double calculatePostage() {
// create a visitor
PostageVisitor visitor = new PostageVisitor();
// iterate through all items
for (Visitable item : items) {
item.accept(visitor);
}
double postage = visitor.getTotalPostage();
return postage;
}
public void visitVisitableCollection(VisitableCollection collection) {
for (Object o : collection.value) {
if (o instanceof Visitable) ((Visitable) o).accept(this);
}
}
