/*
* RemoveArc removes from the graph an arc between two nodes.
*/
public void RemoveArc(Node node1, Node node2)
{
//System.Console.WriteLine("\nIn RemoveArc()");
if (!ContainsArc(node1.Name + "<-->" + node2.Name))
{
System.Console.WriteLine("Arc not found in list of arcs; Nothing done");
//System.Console.WriteLine("Leaving RemoveArc()\n");
return;
}
// Remove actual connection between nodes
if (node1.NodeConnectedViaNorthArcOption.Equals(node2))
{
node1.ResetSpecifiedArcOptionToDefault("north");
node2.ResetSpecifiedArcOptionToDefault("south");
}
else if (node1.NodeConnectedViaEastArcOption.Equals(node2))
{
node1.ResetSpecifiedArcOptionToDefault("east");
node2.ResetSpecifiedArcOptionToDefault("west");
}
else if (node1.NodeConnectedViaSouthArcOption.Equals(node2))
{
node1.ResetSpecifiedArcOptionToDefault("south");
node2.ResetSpecifiedArcOptionToDefault("north");
}
else if (node1.NodeConnectedViaWestArcOption.Equals(node2))
{
node1.ResetSpecifiedArcOptionToDefault("west");
node2.ResetSpecifiedArcOptionToDefault("east");
}
else
{
System.Console.WriteLine("Error; Connection between nodes not found");
//System.Console.WriteLine("Leaving RemoveArc()\n");
return;
}
// Remove arc from set
string arcName1 = node1.Name + "<-->" + node2.Name;
string arcName2 = node2.Name + "<-->" + node1.Name;
System.Console.WriteLine("Looking for arc in set by name of " + arcName1 + " or " + arcName2);
foreach (Arc arc in _arcs)
{
if (arc.Name.Equals(arcName1) || arc.Name.Equals(arcName2))
{
System.Console.WriteLine("Arc " + arc.Name + " found in list of arcs and being removed");
_arcs.Remove(arc);
break; // The list of arc has shrunk by one. If the foreach is not broken it will
// eventually attempt to access one more than the list's current size.
}
}
//System.Console.WriteLine("Leaving RemoveArc()\n");
}
