Changeset 6966 for branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Potvin/Manipulators/PotvinPairwiseOneLevelExchangeManipulator.cs

Timestamp:

11/08/11 12:46:51 (12 years ago)

Author:

svonolfe

Message:

Improved compatibility of pairwise operators (#1177)

File:

• branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Potvin/Manipulators/PotvinPairwiseOneLevelExchangeManipulator.cs (modified) (1 diff)

branches/VRP/HeuristicLab.Problems.VehicleRouting/3.4/Encodings/Potvin/Manipulators/PotvinPairwiseOneLevelExchangeManipulator.cs

@@ -133 +133 @@
     protected override void Manipulate(IRandom random, PotvinEncoding individual) {
       bool allowInfeasible = AllowInfeasibleSolutions.Value.Value;
+      IPickupAndDeliveryProblemInstance pdp = ProblemInstance as IPickupAndDeliveryProblemInstance;
 
-      int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
-      if (selectedIndex >= 0) {
-        Tour route1 =
-          individual.Tours[selectedIndex];
+      if (pdp != null) {
+        int selectedIndex = SelectRandomTourBiasedByLength(random, individual);
+        if (selectedIndex >= 0) {
+          Tour route1 =
+            individual.Tours[selectedIndex];
 
-        int count = route1.Stops.Count;
+          int count = route1.Stops.Count;
 
-        if (count > 0) {
-          int i = random.Next(0, count);
-          int city = route1.Stops[i];
+          if (count > 0) {
+            int i = random.Next(0, count);
+            int city = route1.Stops[i];
 
-          if (!PairwiseMove(individual, city, allowInfeasible))
-            i++;
+            if (!PairwiseMove(individual, city, allowInfeasible))
+              i++;
 
-          count = route1.Stops.Count;
+            count = route1.Stops.Count;
+          }
         }
       }