Changeset 2794 for trunk/sources/HeuristicLab.Permutation/3.3/RandomPermutationCreator.cs

Timestamp:

02/14/10 05:31:49 (14 years ago)

Author:

swagner

Message:

Operator architecture refactoring (#95)

• worked on operators

File:

• trunk/sources/HeuristicLab.Permutation/3.3/RandomPermutationCreator.cs (moved) (moved from trunk/sources/HeuristicLab.Permutation/3.3/RandomPermutationGenerator.cs) (2 diffs)

trunk/sources/HeuristicLab.Permutation/3.3/RandomPermutationCreator.cs

@@ -1 +1 @@
 #region License Information
 /* HeuristicLab
- * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
+ * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
  *
  * This file is part of HeuristicLab.
@@ -20 +20 @@
 #endregion
 
-using System;
-using System.Collections.Generic;
-using System.Text;
 using HeuristicLab.Core;
 using HeuristicLab.Data;
+using HeuristicLab.Operators;
+using HeuristicLab.Parameters;
+using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
 
 namespace HeuristicLab.Permutation {
   /// <summary>
-  /// Generates a randomly shuffled permuation.
+  /// An operator which creates a new random permutation of integer values.
   /// </summary>
-  public class RandomPermutationGenerator : OperatorBase {
-    /// <inheritdoc select="summary"/>
-    public override string Description {
-      get { return @"TODO\r\nOperator description still missing ..."; }
+  [Item("RandomPermutationCreator", "An operator which creates a new random permutation of integer values.")]
+  [EmptyStorableClass]
+  [Creatable("Test")]
+  public sealed class RandomPermutationCreator : SingleSuccessorOperator {
+    public LookupParameter<IRandom> RandomParameter {
+      get { return (LookupParameter<IRandom>)Parameters["Random"]; }
+    }
+    public ValueLookupParameter<IntData> LengthParameter {
+      get { return (ValueLookupParameter<IntData>)Parameters["Length"]; }
+    }
+    public LookupParameter<Permutation> PermutationParameter {
+      get { return (LookupParameter<Permutation>)Parameters["Permutation"]; }
     }
 
-    /// <summary>
-    /// Initializes a new instance of <see cref="RandomPermutationGenerator"/> with three variable infos
-    /// (<c>Length</c>, <c>Random</c> and <c>Permutation</c>).
-    /// </summary>
-    public RandomPermutationGenerator()
+    public RandomPermutationCreator()
       : base() {
-      AddVariableInfo(new VariableInfo("Length", "Permutation length", typeof(IntData), VariableKind.In));
-      AddVariableInfo(new VariableInfo("Random", "Pseudo random number generator", typeof(IRandom), VariableKind.In));
-      AddVariableInfo(new VariableInfo("Permutation", "Created random permutation", typeof(Permutation), VariableKind.New));
+      Parameters.Add(new LookupParameter<IRandom>("Random", "The pseudo random number generator which should be used to initialize the new random permutation."));
+      Parameters.Add(new ValueLookupParameter<IntData>("Length", "The length of the new random permutation."));
+      Parameters.Add(new LookupParameter<Permutation>("Permutation", "The new random permutation."));
     }
 
-    /// <summary>
-    /// Generates a randomly shuffled permutation.
-    /// </summary>
-    /// <param name="random">The random number generator.</param>
-    /// <param name="length">The length of the permutation to create.</param>
-    /// <returns>The generated permuation as int array.</returns>
-    public static int[] Apply(IRandom random, int length) {
-      int[] perm = new int[length];
-
-      for (int i = 0; i < length; i++)
-        perm[i] = i;
-
-      // Knuth shuffle
-      int index, tmp;
-      for (int i = 0; i < length - 1; i++) {
-        index = random.Next(i, length);
-        tmp = perm[i];
-        perm[i] = perm[index];
-        perm[index] = tmp;
-      }
-      return perm;
-    }
-
-    /// <summary>
-    /// Generates a randomly shuffled permutation.
-    /// </summary>
-    /// <remarks>Calls <see cref="Apply(HeuristicLab.Core.IRandom, int)"/>.</remarks>
-    /// <param name="scope">The current scope with the variables.</param>
-    /// <returns><c>null</c>.</returns>
-    public override IOperation Apply(IScope scope) {
-      IRandom random = GetVariableValue<IRandom>("Random", scope, true);
-      IntData length = GetVariableValue<IntData>("Length", scope, true);
-
-      int[] perm = Apply(random, length.Data);
-      scope.AddVariable(new Variable(scope.TranslateName("Permutation"), new Permutation(perm)));
-
-      return null;
+    public override IExecutionSequence Apply() {
+      PermutationParameter.ActualValue = new Permutation(LengthParameter.ActualValue.Value, RandomParameter.ActualValue);
+      return base.Apply();
     }
   }