public BellmanFord(CGraph graph, CGraphNode source, int graphWeightsKey)
{
mGraph = graph;
m_source = source;
this[m_PATHINFO] = m_outputShortestPathsInfo = new BellmanFordQueryInfo(graph, this);
m_inputGraphWeightInfo = new CGraphQueryInfo <object, int, object>(graph, graphWeightsKey);
m_outputShortestPathsInfo.CreateInfo(m_shortestPaths);
}
public static void TestCaseBook()
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode r = mgraph.CreateGraphNode <CGraphNode>("r");
CGraphNode s = mgraph.CreateGraphNode <CGraphNode>("s");
CGraphNode t = mgraph.CreateGraphNode <CGraphNode>("t");
CGraphNode u = mgraph.CreateGraphNode <CGraphNode>("u");
CGraphNode v = mgraph.CreateGraphNode <CGraphNode>("v");
CGraphNode w = mgraph.CreateGraphNode <CGraphNode>("w");
CGraphNode x = mgraph.CreateGraphNode <CGraphNode>("x");
CGraphNode y = mgraph.CreateGraphNode <CGraphNode>("y");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(r, s, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(r, v, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, w, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(w, t, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(w, x, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, x, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, u, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x, u, GraphType.GT_UNDIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x, y, GraphType.GT_UNDIRECTED);
// 2. Create Algorithm
BreadthFirstSearch bfs = new BreadthFirstSearch(s, mgraph);
// 2. Associate weights with the edges of the graph
CGraphQueryInfo <int, int, int> bfsData = new CGraphQueryInfo <int, int, int>(mgraph, bfs);
bfs.Run();
Console.WriteLine("Printing BFS Results with Source Node : {0}", s.M_Label);
foreach (CGraphNode node in bfs.BFSNodes())
{
Console.WriteLine("Node {0} distance: {1}", node.M_Label, bfs.Distance(node));
}
// Testing BreadthFirstSearchQueryInfo
BreadthFirstSearchQueryInfo bfsInfo = new BreadthFirstSearchQueryInfo(mgraph, bfs);
Console.WriteLine("Printing BFS Results with Source Node : {0}", s.M_Label);
foreach (CGraphNode node in bfsInfo.BFSNodes())
{
Console.WriteLine("Node {0} distance: {1}", node.M_Label, bfs.Distance(node));
}
}
public static void BookExampleTestcase()
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode x = mgraph.CreateGraphNode <CGraphNode>("x");
CGraphNode y = mgraph.CreateGraphNode <CGraphNode>("y");
CGraphNode z = mgraph.CreateGraphNode <CGraphNode>("z");
CGraphNode t = mgraph.CreateGraphNode <CGraphNode>("t");
CGraphNode s = mgraph.CreateGraphNode <CGraphNode>("s");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, y, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x, t, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, s, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, t, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, y, GraphType.GT_DIRECTED);
// 2. Associate weights with the edges of the graph
CGraphQueryInfo <int, int, int> weights = new CGraphQueryInfo <int, int, int>(mgraph, 255);
weights.CreateInfo(y, x, -3);
weights.CreateInfo(x, t, -2);
weights.CreateInfo(t, x, 5);
weights.CreateInfo(z, x, 7);
weights.CreateInfo(y, z, 9);
weights.CreateInfo(t, y, 8);
weights.CreateInfo(t, z, -4);
weights.CreateInfo(s, t, 6);
weights.CreateInfo(s, y, 7);
weights.CreateInfo(z, s, 2);
// 3. Run the BellmanFord algorithm
BellmanFord bl = new BellmanFord(mgraph, s, 255);
bl.FindAllPairsShortestPaths();
// 4. Print Paths
CGraphQueryInfo <int, int, Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > > shortestPath = new CGraphQueryInfo <int, int, Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > >(mgraph, bl);
CIt_GraphNodes i = new CIt_GraphNodes(mgraph);
CIt_GraphNodes j = new CIt_GraphNodes(mgraph);
Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > paths =
(Dictionary <CGraphNode, Dictionary <CGraphNode, Path> >)(shortestPath.Info());
for (i.Begin(); !i.End(); i.Next())
{
Console.WriteLine();
for (j.Begin(); !j.End(); j.Next())
{
Console.WriteLine();
if (i.M_CurrentItem != j.M_CurrentItem)
{
Console.Write(paths[i.M_CurrentItem][j.M_CurrentItem]);
}
}
}
}
public static void TestCase3x3()
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode x1 = mgraph.CreateGraphNode <CGraphNode>("1");
CGraphNode x2 = mgraph.CreateGraphNode <CGraphNode>("2");
CGraphNode x3 = mgraph.CreateGraphNode <CGraphNode>("3");
CGraphNode x4 = mgraph.CreateGraphNode <CGraphNode>("4");
CGraphNode x5 = mgraph.CreateGraphNode <CGraphNode>("5");
CGraphNode x6 = mgraph.CreateGraphNode <CGraphNode>("6");
CGraphNode x7 = mgraph.CreateGraphNode <CGraphNode>("7");
CGraphNode x8 = mgraph.CreateGraphNode <CGraphNode>("8");
CGraphNode x9 = mgraph.CreateGraphNode <CGraphNode>("9");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x1, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x1, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x1, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x1, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x1, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x1, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x3, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x3, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x2, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x2, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x3, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x3, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x3, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x3, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x7, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x7, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x4, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x4, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x7, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x7, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x5, x9, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x9, x5, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x6, x9, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x9, x6, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x7, x8, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x7, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x8, x9, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x9, x8, GraphType.GT_DIRECTED);
// 2. Associate weights with the edges of the graph
CGraphQueryInfo <int, int, int> weights = new CGraphQueryInfo <int, int, int>(mgraph, 255);
weights.CreateInfo(x1, x2, 1);
weights.CreateInfo(x2, x1, 1);
weights.CreateInfo(x1, x5, 1);
weights.CreateInfo(x5, x1, 1);
weights.CreateInfo(x1, x4, 1);
weights.CreateInfo(x4, x1, 1);
weights.CreateInfo(x2, x4, 3);
weights.CreateInfo(x4, x2, 3);
weights.CreateInfo(x2, x3, 1);
weights.CreateInfo(x3, x2, 1);
weights.CreateInfo(x2, x6, 3);
weights.CreateInfo(x6, x2, 3);
weights.CreateInfo(x2, x5, 1);
weights.CreateInfo(x5, x2, 1);
weights.CreateInfo(x3, x5, 3);
weights.CreateInfo(x5, x3, 3);
weights.CreateInfo(x3, x6, 1);
weights.CreateInfo(x6, x3, 1);
weights.CreateInfo(x4, x5, 1);
weights.CreateInfo(x5, x4, 1);
weights.CreateInfo(x4, x7, 1);
weights.CreateInfo(x7, x4, 1);
weights.CreateInfo(x4, x8, 3);
weights.CreateInfo(x8, x4, 3);
weights.CreateInfo(x5, x6, 1);
weights.CreateInfo(x6, x5, 1);
weights.CreateInfo(x5, x7, 3);
weights.CreateInfo(x7, x5, 3);
weights.CreateInfo(x5, x8, 1);
weights.CreateInfo(x8, x5, 1);
weights.CreateInfo(x5, x9, 3);
weights.CreateInfo(x9, x5, 3);
weights.CreateInfo(x6, x8, 3);
weights.CreateInfo(x8, x6, 3);
weights.CreateInfo(x6, x9, 1);
weights.CreateInfo(x9, x6, 1);
weights.CreateInfo(x7, x8, 1);
weights.CreateInfo(x8, x7, 1);
weights.CreateInfo(x8, x9, 1);
weights.CreateInfo(x9, x8, 1);
// 3. Run the BellmanFord algorithm
BellmanFord bl = new BellmanFord(mgraph, x1, 255);
bl.FindAllPairsShortestPaths();
// 4. Print Paths
BellmanFordQueryInfo shortestPath = new BellmanFordQueryInfo(mgraph, bl);
CIt_GraphNodes i = new CIt_GraphNodes(mgraph);
CIt_GraphNodes j = new CIt_GraphNodes(mgraph);
Dictionary <CGraphNode, Dictionary <CGraphNode, Path> > paths =
shortestPath.ShortestPaths();
for (i.Begin(); !i.End(); i.Next())
{
Console.WriteLine();
for (j.Begin(); !j.End(); j.Next())
{
Console.WriteLine();
if (i.M_CurrentItem != j.M_CurrentItem)
{
Console.Write(paths[i.M_CurrentItem][j.M_CurrentItem]);
}
}
}
}
static void Main(string[] args)
{
// 1. Create a graph
CGraph mgraph = CGraph.CreateGraph();
CGraphNode x = mgraph.CreateGraphNode <CGraphNode>("x");
CGraphNode y = mgraph.CreateGraphNode <CGraphNode>("y");
CGraphNode z = mgraph.CreateGraphNode <CGraphNode>("z");
CGraphNode t = mgraph.CreateGraphNode <CGraphNode>("t");
CGraphNode s = mgraph.CreateGraphNode <CGraphNode>("s");
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, y, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(t, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(x, t, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(y, z, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, x, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(z, s, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, t, GraphType.GT_DIRECTED);
mgraph.AddGraphEdge <CGraphEdge, CGraphNode>(s, y, GraphType.GT_DIRECTED);
// 2. Associate weights with the edges of the graph
CGraphQueryInfo <int, int, int> weights = new CGraphQueryInfo <int, int, int>(mgraph, 255);
weights.CreateInfo(y, x, -3);
weights.CreateInfo(x, t, -2);
weights.CreateInfo(t, x, 5);
weights.CreateInfo(z, x, 7);
weights.CreateInfo(y, z, 9);
weights.CreateInfo(t, y, 8);
weights.CreateInfo(t, z, -4);
weights.CreateInfo(s, t, 6);
weights.CreateInfo(s, y, 7);
weights.CreateInfo(z, s, 2);
mgraph.RegisterGraphPrinter(new CGraphVizPrinter(mgraph));
// The graph uses the registered printers to print the graph to the specified output
mgraph.Generate(@"D:\MyPrivateWork\MyApps\MyApplications\EDUFLEX\GraphLibrary\TestSerialization\bin\Debug\test.dot", true);
BinaryFormatter saver = new BinaryFormatter();
XmlSerializer xmlsaver = new XmlSerializer(typeof(CGraph));
using (Stream stream = new FileStream("graph.g", FileMode.Create, FileAccess.Write)) {
saver.Serialize(stream, mgraph);
}
CGraph deserializedGraph;
using (Stream stream = new FileStream("graph.g", FileMode.Open, FileAccess.Read)) {
deserializedGraph = (CGraph)saver.Deserialize(stream);
}
deserializedGraph.RegisterGraphPrinter(new CGraphVizPrinter(mgraph));
// The graph uses the registered printers to print the graph to the specified output
deserializedGraph.Generate(@"D:\MyPrivateWork\MyApps\MyApplications\EDUFLEX\GraphLibrary\TestSerialization\bin\Debug\regentest.dot", true);
using (Stream stream = new FileStream("graph.xml", FileMode.Create, FileAccess.Write)) {
xmlsaver.Serialize(stream, mgraph);
}
}
