Changeset 1218 for trunk/sources/HeuristicLab.Permutation/PositionBasedCrossover.cs

Timestamp:

02/16/09 01:21:53 (15 years ago)

Author:

swagner

Message:

Refactoring of crossover operators (#470)

File:

• trunk/sources/HeuristicLab.Permutation/PositionBasedCrossover.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Permutation/PositionBasedCrossover.cs

@@ -78 +78 @@
 
     /// <summary>
-    /// Performs a cross over permutation of <paramref name="parent1"/> and <paramref name="parent2"/>
-    /// based on randomly chosen positions to define which position to take from where.
+    /// Performs a position-based crossover operation for two given parent permutations.
     /// </summary>
-    /// <remarks>Calls <see cref="Apply"/>.</remarks>
+    /// <exception cref="InvalidOperationException">Thrown if there are not exactly two parents.</exception>
     /// <param name="scope">The current scope.</param>
-    /// <param name="random">The random number generator.</param>
-    /// <param name="parent1">The permutation array of parent 1.</param>
-    /// <param name="parent2">The permutation array of parent 2.</param>
-    /// <returns>The created cross over permutation as int array.</returns>
-    protected override int[] Cross(IScope scope, IRandom random, int[] parent1, int[] parent2) {
-      return Apply(random, parent1, parent2);
+    /// <param name="random">A random number generator.</param>
+    /// <param name="parents">An array containing the two permutations that should be crossed.</param>
+    /// <returns>The newly created permutation, resulting from the crossover operation.</returns>
+    protected override int[] Cross(IScope scope, IRandom random, int[][] parents) {
+      if (parents.Length != 2) throw new InvalidOperationException("ERROR in PositionBasedCrossover: The number of parents is not equal to 2");
+      return Apply(random, parents[0], parents[1]);
     }
   }