public GraphColoringAlgorithm(Graph.IGraphInterface graph)
{
this.graph = graph;
countInterchangeCalls = 0;
coloredGraph = graph.GetColoredGraph();
countVertices = graph.GetRealCountVertices();
}
private void Testing(SmallestLastSequenceEnum smallestLastSequence)
{
try
{
testPath = ReaderWriter.ReaderWriter.CreateTestFile(testsDictionary[smallestLastSequence]);
reader = new ReaderWriter.ReaderGraph(testPath, false);
graph = reader.ReadFile();
SmallestLastSequence smallestLastSequenceAlgorithm = new SmallestLastSequence(graph);
smallestLastSequenceAlgorithm.Color();
stringBuilder.AppendLine(smallestLastSequence.ToString());
stringBuilder.AppendLine("Graph colored.");
stringBuilder.AppendLine(graph.GetColoredGraph().ToString());
}
catch (KeyNotFoundException)
{
throw new MyException.TestsException.TestsMissingTestException(smallestLastSequence.ToString());
}
catch (MyException.ReaderWriterException.ReaderWriterException e)
{
stringBuilder.AppendLine(e.Message);
}
}
private void Testing(ConnectedSequentialEnum connectedSequential)
{
try
{
testPath = ReaderWriter.ReaderWriter.CreateTestFile(testsDictionary[connectedSequential]);
reader = new ReaderWriter.ReaderGraph(testPath, false);
graph = reader.ReadFile();
ConnectedSequential optimalAlgorithm = new ConnectedSequential(graph);
optimalAlgorithm.Color();
stringBuilder.AppendLine(connectedSequential.ToString());
stringBuilder.AppendLine("Graph colored.");
stringBuilder.AppendLine(graph.GetColoredGraph().ToString());
}
catch (KeyNotFoundException)
{
throw new MyException.TestsException.TestsMissingTestException(connectedSequential.ToString());
}
catch (MyException.ReaderWriterException.ReaderWriterException e)
{
stringBuilder.AppendLine(e.Message);
}
}
private void Testing(GreedyIndependentSetEnum greedyIndependentSet)
{
try
{
testPath = ReaderWriter.ReaderWriter.CreateTestFile(testsDictionary[greedyIndependentSet]);
reader = new ReaderWriter.ReaderGraph(testPath, false);
graph = reader.ReadFile();
GreedyIndependentSet greedyIndependentSetAlgorithm = new GreedyIndependentSet(graph);
greedyIndependentSetAlgorithm.Color();
stringBuilder.AppendLine(greedyIndependentSetAlgorithm.ToString());
stringBuilder.AppendLine("Graph colored.");
stringBuilder.AppendLine(graph.GetColoredGraph().ToString());
}
catch (KeyNotFoundException)
{
throw new MyException.TestsException.TestsMissingTestException(greedyIndependentSet.ToString());
}
catch (MyException.ReaderWriterException.ReaderWriterException e)
{
stringBuilder.AppendLine(e.Message);
}
}
/// <summary>
/// Write a colored graph to a file
/// If the colored graph is not initialized throws ColoredGraphNotInitializationException
/// </summary>
/// <param name="graph">Colored graph</param>
/// <param name="graphColoringAlgorithm">Algorithm which was used for coloring the graph</param>
/// <param name="isOptimal">Is the algorithm optimal for the graph</param>
public bool WriteFileColor(Graph.IGraphInterface graph, GraphColoringAlgorithm.GraphColoringAlgorithm.GraphColoringAlgorithmEnum graphColoringAlgorithm, bool isOptimal)
{
// Variable
Graph.IColoredGraphInterface coloredGraph;
coloredGraph = graph.GetColoredGraph();
if (!coloredGraph.GetIsInitializedColoredGraph())
{
throw new MyException.GraphException.ColoredGraphNotInitializationException();
}
if (CheckIfRecordExists(graphColoringAlgorithm))
{
return(false);
}
using (StreamWriter streamWriter = File.AppendText(GetPath()))
{
streamWriter.WriteLine();
// Number of colors
if (isOptimal)
{
streamWriter.WriteLine(READERWRITERCHROMATICNUMBER + coloredGraph.GetCountUsedColors());
}
else
{
streamWriter.WriteLine(READERWRITERNUMBEROFCOLORS + coloredGraph.GetCountUsedColors());
}
// Used algorithm
streamWriter.WriteLine(READERWRITERUSEDALGORITHM + graphColoringAlgorithm);
// Colored graph
List <int> colorList = coloredGraph.UsedColors();
foreach (int color in colorList)
{
List <Graph.IVertexInterface> vertexList = coloredGraph.ColoredVertices(color);
streamWriter.WriteLine("- " + color);
vertexList.ForEach(vertex => { streamWriter.WriteLine("-- " + vertex.GetUserName()); });
}
}
return(true);
}
private void Testing(GeneticAlgorithmEnum geneticAlgorithm)
{
try
{
erdosRenyiModel = new GenerateGraph.ErdosRenyiModel.ErdosRenyiModel(random.Next(15, 25));
graph = erdosRenyiModel.GenerateGraph();
GeneticAlgorithm algorithm = new GeneticAlgorithm(graph, 2, random.Next(250, 300));
algorithm.Color();
stringBuilder.AppendLine(algorithm.ToString());
stringBuilder.AppendLine("Graph colored.");
stringBuilder.AppendLine("Is valid colored: " + graph.GetColoredGraph().IsValidColored().ToString());
}
catch (KeyNotFoundException)
{
throw new MyException.TestsException.TestsMissingTestException(geneticAlgorithm.ToString());
}
catch (MyException.ReaderWriterException.ReaderWriterException e)
{
stringBuilder.AppendLine(e.Message);
}
}
/// <summary>
/// Return true if a graph has been colored in polynomal time, otherwise false
/// </summary>
/// <param name="graph">graph</param>
/// <returns>true if graph has been colored in polynomal time, otherwise false</returns>
public static bool TryOptimalColorInPolynomalTime(Graph.IGraphInterface graph)
{
bool isColored;
IGraphColoringAlgorithmInterface algorithm;
List <Graph.IVertexInterface> optimalVertexList;
Graph.IColoredGraphInterface coloredGraph = graph.GetColoredGraph();
coloredGraph.ResetColors();
// If the graph is chordal => use PEO for coloring
if (graph.GetGraphProperty().GetIsChordal())
{
optimalVertexList = graph.GetGraphProperty().GetPerfectEliminationOrdering();
coloredGraph.GreedyColoring(optimalVertexList);
isColored = coloredGraph.InitializeColoredGraph();
if (!isColored)
{
throw new MyException.GraphColoringAlgorithmException.AlgorithmGraphIsNotColored();
}
return(true);
}
switch (graph.GetGraphProperty().GetGraphClass())
{
case Graph.GraphClass.GraphClass.GraphClassEnum.bipartiteGraph:
Tuple <List <Graph.IVertexInterface>, List <Graph.IVertexInterface> > partites = graph.GetGraphProperty().GetPartites();
coloredGraph.GreedyColoring(partites.Item1.Concat(partites.Item2).ToList());
isColored = coloredGraph.InitializeColoredGraph();
if (!isColored)
{
throw new MyException.GraphColoringAlgorithmException.AlgorithmGraphIsNotColored();
}
return(true);
case Graph.GraphClass.GraphClass.GraphClassEnum.completeBipartiteGraph:
algorithm = new SequenceAlgorithm.SmallestLastSequence.SmallestLastSequence(graph);
algorithm.Color();
return(true);
case Graph.GraphClass.GraphClass.GraphClassEnum.completeGraph:
coloredGraph.GreedyColoring(graph.AllVertices());
isColored = coloredGraph.InitializeColoredGraph();
if (!isColored)
{
throw new MyException.GraphColoringAlgorithmException.AlgorithmGraphIsNotColored();
}
return(true);
case Graph.GraphClass.GraphClass.GraphClassEnum.cycleGraph:
case Graph.GraphClass.GraphClass.GraphClassEnum.treeGraph:
algorithm = new SequenceAlgorithm.ConnectedSequential.ConnectedSequential(graph);
algorithm.Color();
return(true);
}
return(false);
}
