blue_colour_filter.h

#ifndef BLUE_COLOUR_FILTER_H_
#define BLUE_COLOUR_FILTER_H_

#include <string>

#include "graph_filter.h"

template<typename GraphType>
class BlueColourFilter : 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;

    BlueColourFilter(GraphProperties<GraphType>& properties) :
                      GraphFilter<GraphType>("BlueFilter", "blue_colour_filter"), 
                      properties_(properties) {
    }

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

   virtual bool operator() (E_type edge) {
     return (edge->from() != 0 ? operator()(edge->from()) : true) &&
            (edge->to() != 0 ? operator()(edge->to()) : true);
   }

    virtual bool operator() (V_type m) {
      properties_.set_property(m, "colour", "blue");
      return true;
    }

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

  private:
    GraphProperties<GraphType>& properties_;
};

#endif