cppFixEdgeObjs

// COM1205 Propagation Pattern for DemDraw project
//
// Created by Tom Kneeland (tomk@ccs.neu.edu)
//
// 	This propagation pattern traverses all the edge objects stored in the 
// edges list, and associates its from and to data members with real vertex
// objects based on the tempory vertex objects stored in the from and to
// data mambers.  These tempory objects are automatically created when an
// input file is loaded using g_parse().  
//	cppLookUpVName is used with each tempory vertex's name to find the
// proper real vertex.

*operation* void cppFixEdgeObjs()
    *traverse*
	*from* Graph
	*to* Edge

    *carry* *in* Graph* tmpGraph = (@ this @)
	*along* *from* Graph *to* Edge


    *wrapper* Edge
	(@ 
	   // Pointer to the tempory vertex.
	   Vertex* wrongVert;

	   //Get the name of the  tempory vertex.
	   DemIdent* name = this->get_from()->get_vertexname()->get_name();

 	   //Point the  datamember to the real vertex.
	   wrongVert = rset_from(tmpGraph->cppLookUpVName(name));
	   //Delete the tempory vertex object.
	   delete wrongVert;

	   //Get the name of the  tempory vertex.
	   name = this->get_to()->get_vertexname()->get_name();

	   //Point the  datamember to the real vertex.
	   wrongVert = rset_to(tmpGraph->cppLookUpVName(name));
	   //Delete the tempory vertex object.
	   delete wrongVert;
	 @)