true_filter.h

#ifndef TRUE_FILTER_H_ 
#define TRUE_FILTER_H_ 

#include <string>
#include <iostream>
#include "graph_filter.h"

template<typename GraphType>
class TrueFilter : public GraphFilter<GraphType> {
  public:
    typedef typename GraphType::node_value_type V_type;
    typedef typename GraphType::edge_value_type E_type;
    typedef typename GraphType::index_type_t index_type_t;

    TrueFilter(std::string filter_name) :
                           GraphFilter<GraphType>(filter_name, "true_filter")  {
    }

    virtual GraphFilter<GraphType>* clone() {
      TrueFilter<GraphType>* clone = new TrueFilter<GraphType>(*this);
      return clone;
    }

    virtual bool operator() (E_type edge) {
      (void)edge;
      if(this->inverted_)   
        return false;
      else 
        return true;
    }

    virtual bool operator() (V_type m) {
      (void)m;
      if(this->inverted_)   
        return false;
      else 
        return true;
    }

    template<typename P1, typename P2>
    bool operator() (std::pair<P1, P2>& m) {
      return  operator()(m.second);
    }
};

#endif