#include <fstream>

 #include <iostream>

 #include <lemon/xy.h>

 #include <lemon/maps.h>

 #include <lemon/error.h>

 #include <lemon/list_graph.h>

 #include <lemon/graph_reader.h>

 #include <lemon/graph_utils.h>

 using namespace lemon;

 typedef ListGraph Graph;

 typedef xy<double> Coordinates;

 typedef Graph::NodeMap<Coordinates> CoordinatesMap;

 typedef Graph::Node Node;

 class CoordReaderMap: public MapBase<Node, double>

 {

     CoordinatesMap * cm;

     char xoy;

 public:

     CoordReaderMap(char xory, CoordinatesMap * coordmap): cm(coordmap)

     {

 	switch(xory)

 	{

 	    case 'x':

 	    case 'y':

 		xoy=xory;

 		break;

 	    default:

 		throw UninitializedParameter() ;

 	}

     }

     void set(Node node, double coord)

     {

 	switch(xoy)

 	{

 	    case 'x':

 		(*cm)[node].x=coord;

 		break;

 	    case 'y':

 		(*cm)[node].y=coord;

 		break;

 	    default:

 		throw UninitializedParameter() ;

 	}

     }

 };

 int main(void)

 {

     Graph g;

     CoordinatesMap cm(g);

     CoordReaderMap xreader('x',&cm);

     CoordReaderMap yreader('y',&cm);

     std::ifstream is("dijkstra_test.lemon");

     GraphReader<Graph> reader(is, g);

     reader.addNodeMap("coordinates_x", xreader);

     reader.addNodeMap("coordinates_y", yreader);

     reader.run();

     return 0;

 }