Changeset 15083 for trunk/sources/HeuristicLab.Problems.Scheduling/3.3/Evaluators

Timestamp:

06/28/17 22:22:12 (7 years ago)

Author:

abeham

Message:

#2790:

• Fixed small bug in JSSP where solution creator changed was not fired
• Added IStochasticOperator to SchedulingEvaluator and added backwards compatibility code

File:

• trunk/sources/HeuristicLab.Problems.Scheduling/3.3/Evaluators/SchedulingEvaluator.cs (modified) (5 diffs)

trunk/sources/HeuristicLab.Problems.Scheduling/3.3/Evaluators/SchedulingEvaluator.cs

@@ -26 +26 @@
 using HeuristicLab.Encodings.ScheduleEncoding;
 using HeuristicLab.Operators;
+using HeuristicLab.Optimization;
 using HeuristicLab.Parameters;
 using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
@@ -32 +33 @@
   [Item("SchedulingEvaluator", "First applies the decoder operator to obtain a schedule from an encoding and then applies the evaluator to obtain a quality.")]
   [StorableClass]
-  public class SchedulingEvaluator : InstrumentedOperator, ISchedulingEvaluator {
+  public class SchedulingEvaluator : InstrumentedOperator, ISchedulingEvaluator, IStochasticOperator {
 
     public IValueLookupParameter<IScheduleDecoder> ScheduleDecoderParameter {
@@ -49 +50 @@
       get { return (ILookupParameter<DoubleValue>)Parameters["Quality"]; }
     }
+    // ABE: This parameter exists purely, because some IScheduleDecoders are stochastic...
+    // ... which could be solved by letting the algorithm parameterize them ...
+    // ... but they have to use the same RNG as the evaluator (due to parallel execution)...
+    // ... in particular relevant for Island-GA and ALPS (Local- vs GlobalRandom).
+    public ILookupParameter<IRandom> RandomParameter {
+      get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
+    }
 
     [StorableConstructor]
@@ -58 +66 @@
       Parameters.Add(new ValueLookupParameter<IScheduleEvaluator>("ScheduleEvaluator", "The actual schedule evaluation operator."));
       Parameters.Add(new LookupParameter<DoubleValue>("Quality", "The quality value aka fitness value of the solution."));
+      Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));
       QualityParameter.Hidden = true;
     }
@@ -63 +72 @@
     public override IDeepCloneable Clone(Cloner cloner) {
       return new SchedulingEvaluator(this, cloner);
+    }
+    
+    [StorableHook(HookType.AfterDeserialization)]
+    private void AfterDeserialization() {
+      // BackwardsCompatibility3.3
+      #region Backwards compatible code, remove with 3.4
+      if (!Parameters.ContainsKey("Random")) {
+        Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator to use."));
+      }
+      #endregion
     }