/// <summary>
/// Das Constraint wird mit den Variablen und Werten der übergebenen Konfiguration initialisiert.
/// </summary>
/// <remarks>
/// Die Randbedingung gehört nicht zu einer Konfiguration. Das erspart deren Kopieren bei Erstellung einer
/// neuen Konfiguration. Stattdessen wird die Randbedingung vor deren Prüfung mit der zu prüfenden Konfiguration
/// initialisier.
/// </remarks>
/// <param name="configuration">Mit dieser Konfiguration wird die Randbedingung initialisiert.</param>
public void SetCurrentConfiguration(ConstraintConfiguration configuration)
{
foreach (VariablesOperator varOperator in _varOperators)
{
varOperator.Var = configuration.GetVariable(varOperator.Name);
}
}
/*public OptimizationConstraint OptConstraint
* {
* get
* {
* return _objectiveConstraint;
* }
* }*/
/// <summary>
/// Für den übergebenen Knoten werden neue Unterknoten generiert.
/// </summary>
/// <returns>Gibt die Menge der generierten Knoten als Array zurück.</returns>
/// <param name="node">Anhand des übergebenen Knotens werden neue Unterknoten
/// generiert.</param>
/// <param name="maxCount">Beschränkt die Anzahl der Unterknoten.</param>
public override INode[] GenerateChildren(INode node, int maxCount)
{
try
{
ConstraintConfiguration parentConfiguration = (ConstraintConfiguration)node.Data;
Variable nextVar = _heuristicVariable.GetHeuristicVariable(parentConfiguration, _constraintList);
List <INode> generatedNodes = new List <INode>();
/*if (_destination != null)
* {
* if (!CheckEdgeConsistency(parentConfiguration))
* return new Node[0]; ;
* }*/
/*if (!CheckNodeConsistency(parentConfiguration, true))
* {
* return new Node[0];
* }*/
//// Zufall
//SortedList<double, double> sortedList = new SortedList<double, double>(nextVar.Domain.Count);
//foreach (double value in nextVar.Domain)
//{
// sortedList.Add(_random.NextDouble(), value);
//}
//foreach (double value in sortedList.Values)
foreach (double value in nextVar.Domain)
{
ConstraintConfiguration configuration = new ConstraintConfiguration(parentConfiguration);
Variable currentVar = configuration.GetVariable(nextVar.Name);
currentVar.Value = value;
List <Constraint> constraints = _constraintList.GetConstraints(nextVar.Name);
bool operationFailed = false;
foreach (Constraint cons in constraints)
{
cons.SetCurrentConfiguration(configuration);
//if (cons.IsComplied == false)
//{
// operationFailed = true;
// break;
//}
if (_consistencyOptions.GetCheckConsistencyActive(ConsistencyCheckRegion.EachNodeGenerating, ConsistencyType.Node) &&
configuration.CheckNodeConsistency(cons, false) == false)
{
operationFailed = true;
break;
}
else if (_consistencyOptions.GetCheckConsistencyActive(ConsistencyCheckRegion.EachNodeGenerating, ConsistencyType.Arc) == true &&
CheckArcConsistency(configuration) == false)
{
operationFailed = true;
break;
}
/*else if (!configuration.CheckLimitConsistency(cons))
* {
* operationFailed = true;
* break;
* }*/
/*else if (_destination != null && !configuration.CheckEdgeConsistency(cons, ref operationFailed))
* {
* operationFailed = true;
* break;
* }
* operationFailed = false;*/
}
if (!operationFailed)
{
// Prüfe zusätzlich die Zielfunktion der Optimierung, wenn schon eine Lösung existiert
if (_solutionList.Count != 0)
{
_objectiveConstraint.SetCurrentConfiguration(configuration);
if (_objectiveConstraint.IsComplied == false)
{
operationFailed = true;
}
}
}
if (!operationFailed)
{
// Die Domaene kann gelöscht werden
currentVar.Domain = null;
generatedNodes.Add(CreateNode(node, configuration));
/*if (generatedNodes.Count > 10)
* break;*/
//configuration.Show();
//_log.Debug("OptConfiguration: " + configuration.ToString());
}
}
INode[] result = new INode[generatedNodes.Count];
generatedNodes.CopyTo(result);
return(result);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// Für den übergebenen Knoten werden neue Unterknoten generiert.
/// </summary>
/// <param name="node">Anhand des übergebenen Knotens werden neue Unterknoten
/// generiert.</param>
/// <param name="maxCount">Beschränkt die Anzahl der Unterknoten.</param>
/// <returns>
/// Gibt die Menge der generierten Knoten als Array zurück.
/// </returns>
public virtual INode[] GenerateChildren(INode node, int maxCount)
{
ConstraintConfiguration parentConfiguration = (ConstraintConfiguration)node.Data;
Variable nextVar = _heuristicVariable.GetHeuristicVariable(parentConfiguration, _constraintList);
List <INode> generatedNodes = new List <INode>();
if (nextVar == null)
{
throw new Exception("nextVar is null");
}
//// Zufall
//List<KeyValuePair<double, double>> sortedList = new List<KeyValuePair<double, double>>(nextVar.Domain.Count);
//foreach (double value in nextVar.Domain)
//{
// sortedList.Add(new KeyValuePair<double,double>(_random.NextDouble(), value));
//}
//sortedList.Sort();
//foreach (KeyValuePair<double,double> pair in sortedList)
foreach (double value in nextVar.Domain)
{
ConstraintConfiguration configuration = new ConstraintConfiguration(parentConfiguration);
Variable currentVar = configuration.GetVariable(nextVar.Name);
currentVar.Value = value;
List <Constraint> constraints = _constraintList.GetConstraints(nextVar.Name);
bool operationFailed = false;
foreach (Constraint cons in constraints)
{
bool tempChanging = false;
cons.SetCurrentConfiguration(configuration);
// todo: Ist diese Abfrage wirklich notwendig?
//if (cons.IsComplied == false)
//{
// operationFailed = true;
// break;
//}
if (_consistencyOptions.GetCheckConsistencyActive(ConsistencyCheckRegion.EachNodeGenerating, ConsistencyType.Bounds) && ConstraintForms.CheckBoundsConsistency(cons, ref tempChanging) == false)
{
operationFailed = true;
break;
}
else if (_consistencyOptions.GetCheckConsistencyActive(ConsistencyCheckRegion.EachNodeGenerating, ConsistencyType.Node) && configuration.CheckNodeConsistency(cons, false) == false)
{
operationFailed = true;
break;
}
else if (_consistencyOptions.GetCheckConsistencyActive(ConsistencyCheckRegion.EachNodeGenerating, ConsistencyType.Arc) && CheckArcConsistency(configuration) == false)
{
operationFailed = true;
break;
}
}
if (!operationFailed)
{
// Die Domaene kann gelöscht werden
currentVar.Domain = null;
generatedNodes.Add(CreateNode(node, configuration));
//configuration.Show();
}
}
INode[] result;
result = new INode[generatedNodes.Count];
generatedNodes.CopyTo(result);
return(result);
}
