+namespace yp2
+{
+ class ChainPos;
+
+ class RouterChain::Rep {
+ friend class RouterChain;
+ friend class RouterChain::Pos;
+ std::list<const filter::Base *> m_filter_list;
+ };
+ class RouterChain::Pos : public RoutePos {
+ public:
+ virtual const filter::Base *move(const char *route);
+ virtual RoutePos *clone();
+ virtual ~Pos();
+ std::list<const filter::Base *>::const_iterator it;
+ yp2::RouterChain::Rep *m_p;
+ };
+}
+
+yp2::RouterChain::RouterChain() : m_p(new yp2::RouterChain::Rep)
+{
+}
+
+yp2::RouterChain::~RouterChain()
+{
+}
+
+const yp2::filter::Base *yp2::RouterChain::Pos::move(const char *route)
+{
+ if (it == m_p->m_filter_list.end())
+ return 0;
+ const yp2::filter::Base *f = *it;
+ it++;
+ return f;
+}
+
+yp2::RoutePos *yp2::RouterChain::createpos() const
+{
+ yp2::RouterChain::Pos *p = new yp2::RouterChain::Pos;
+ p->it = m_p->m_filter_list.begin();
+ p->m_p = m_p.get();
+ return p;
+}