protected override void Execute(CodeActivityContext context)
{
List <string> listStrSrc = CandidateStringList.Get(context);
int intListCount = listStrSrc.Count;
if (intListCount % 2 == 0 || intListCount < 3)
{
throw (new ArgumentException("Number of list item must be odd number and no less than 3"));
}
Dictionary <string, int> dicStringCount = new Dictionary <string, int>();
Dictionary <string, double> dicRMSE = new Dictionary <string, double>();
//Check CandidateStringList
int i = 0;
while (i < listStrSrc.Count)
{
if (String.IsNullOrEmpty(listStrSrc[i]))
{
throw (new ArgumentException("Empty string is not allowed in CandidateStringList."));
}
i++;
}
//Main Calculation loop
i = 0;
double[] dblSumOfSquare = new double[intListCount * intListCount];
while (i < intListCount)
{
//For check matching
if (dicStringCount.ContainsKey(listStrSrc[i]))
{
dicStringCount[listStrSrc[i]]++;
}
else
{
dicStringCount[listStrSrc[i]] = 1;
}
//Calculate Edit Distance
int j = 0;
Fastenshtein.Levenshtein lev = new Fastenshtein.Levenshtein(listStrSrc[i]);
while (j < intListCount)
{
if (i != j)
{
double dblNormalizedEditDistance = ((double)lev.DistanceFrom(listStrSrc[j])) / (double)Math.Max(listStrSrc[i].Length, listStrSrc[j].Length);
dblSumOfSquare[j + i * intListCount] = Math.Pow(dblNormalizedEditDistance, 2);
}
j++;
}
i++;
}
// Calculate RMSE
i = 0;
while (i < intListCount)
{
if (!dicRMSE.ContainsKey(listStrSrc[i]))
{
dicRMSE[listStrSrc[i]] = 0;
int j = 0;
while (j < intListCount)
{
if (i != j)
{
dicRMSE[listStrSrc[i]] += dblSumOfSquare[j + i * intListCount];
}
j++;
}
dicRMSE[listStrSrc[i]] = Math.Sqrt(dicRMSE[listStrSrc[i]] / (double)(intListCount - 1));
}
i++;
}
//Check matching count
string[] sortedKeysCount = new string[dicStringCount.Count];
int[] sortedValuesCount = new int[dicStringCount.Count];
dicStringCount.Keys.CopyTo(sortedKeysCount, 0);
dicStringCount.Values.CopyTo(sortedValuesCount, 0);
Array.Sort(sortedValuesCount, sortedKeysCount);
Array.Reverse(sortedValuesCount);
Array.Reverse(sortedKeysCount);
int intCountMode = sortedValuesCount[0];
string strCandidateFromMatching = sortedKeysCount[0];
if (intCountMode == intListCount)
{
Unanimous.Set(context, strCandidateFromMatching);
}
else
{
Unanimous.Set(context, string.Empty);
}
if (intCountMode > (intListCount >> 1))
{
Majority.Set(context, strCandidateFromMatching);
}
else
{
Majority.Set(context, string.Empty);
}
//Sort RMSE
string[] sortedKeys = new string[dicRMSE.Count];
double[] sortedValues = new double[dicRMSE.Count];
dicRMSE.Keys.CopyTo(sortedKeys, 0);
dicRMSE.Values.CopyTo(sortedValues, 0);
Array.Sort(sortedValues, sortedKeys);
SortedTextArray.Set(context, sortedKeys);
RMSEArray.Set(context, sortedValues);
}
