node.hpp

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#ifndef RDF_NODE_HPP_
#define RDF_NODE_HPP_
#include "owlcpp/ns_id.hpp"

namespace owlcpp{
class Visitor_node;

class Node {
   friend inline std::size_t hash_value(Node const& node)
   {return node.hash_impl();}

public:
   Ns_id ns_id() const {return ns_id_impl();}
   bool operator== (const Node& n) const {return equal_impl(n);}
   bool operator!= (const Node& n) const {return ! equal_impl(n);}
   void accept(Visitor_node& visitor) const {accept_impl(visitor);}
   Node* clone() const {return clone_impl();}
   virtual ~Node() {}

private:
   virtual Ns_id ns_id_impl() const =0;
   virtual std::size_t hash_impl() const =0;
   virtual bool equal_impl(const Node& n) const =0;
   virtual void accept_impl(Visitor_node&) const =0;
   virtual Node* clone_impl() const =0;
};

}//namespace owlcpp
#endif /* RDF_NODE_HPP_ */