Changeset 15067 for trunk/sources/HeuristicLab.Encodings.BinaryVectorEncoding

Timestamp:

06/26/17 23:13:15 (7 years ago)

Author:

abeham

Message:

#2730:

• Unified implementation of all equality comparers and similarity calculators in BinaryVector, IntegerVector, RealVector, Permutation, and LinearLinkage encodings
• Added Euclidean distance-based similarity calculators for real and integer vectors using a transformation function with scaling parameter

Location:

trunk/sources/HeuristicLab.Encodings.BinaryVectorEncoding/3.3

Files:

• BinaryVectorEqualityComparer.cs (modified) (1 diff)
• SimilarityCalculators/HammingSimilarityCalculator.cs (modified) (1 diff)

trunk/sources/HeuristicLab.Encodings.BinaryVectorEncoding/3.3/BinaryVectorEqualityComparer.cs

@@ -19 +19 @@
  */
 #endregion
- 
+
+using System;
 using System.Collections.Generic;
-using System.Linq;
+using HeuristicLab.PluginInfrastructure;
 
 namespace HeuristicLab.Encodings.BinaryVectorEncoding {
+  [NonDiscoverableType]
   public class BinaryVectorEqualityComparer : EqualityComparer<BinaryVector> {
-    public override bool Equals(BinaryVector first, BinaryVector second) {
-      return first.SequenceEqual(second);
+    public override bool Equals(BinaryVector x, BinaryVector y) {
+      if (x == null && y == null) return true;
+      if (x == null || y == null) return false;
+      if (ReferenceEquals(x, y)) return true;
+      if (x.Length != y.Length) return false;
+      for (var i = 0; i < x.Length; i++)
+        if (x[i] != y[i]) return false;
+      return true;
     }
     public override int GetHashCode(BinaryVector obj) {
+      if (obj == null) throw new ArgumentNullException("obj", "BinaryVectorEqualityComparer: Cannot compute hash value of null.");
       unchecked {
         int hash = 17;

trunk/sources/HeuristicLab.Encodings.BinaryVectorEncoding/3.3/SimilarityCalculators/HammingSimilarityCalculator.cs

@@ -45 +45 @@
     public static double CalculateSimilarity(BinaryVector left, BinaryVector right) {
       if (left == null || right == null)
-        throw new ArgumentException("Cannot calculate similarity because one or both of the provided scopes is null.");
+        throw new ArgumentException("Cannot calculate similarity because one or both of the provided solutions is null.");
       if (left.Length != right.Length)
         throw new ArgumentException("Cannot calculate similarity because the provided solutions have different lengths.");
-      if (left == right) return 1.0;
+      if (left.Length == 0)
+        throw new ArgumentException("Cannot calculate similarity because solutions are of length 0.");
+      if (ReferenceEquals(left, right)) return 1.0;
 
       double similarity = 0.0;