private static Dictionary <string, decimal> CalculateCriteriaRdvs(Decision decision)
{
// add inverse criteria comparisons
var criteriaComparisons = decision.CriteriaComparisons.ToList();
// add inverses
var inverseCriteriaComparisons = criteriaComparisons.Select(cc =>
{
var inverseCc = new CriteriaComparison(cc.CriterionTwo, cc.CriterionOne);
inverseCc.SetWeight(GetInverseWeight(cc.Weight.Value));
return(inverseCc);
}).ToList();
criteriaComparisons.AddRange(inverseCriteriaComparisons);
var totalCritCompWeight = criteriaComparisons.Sum(cc => GetWeightFactor(cc.Weight.Value));
// build RDVs for each criterion
var criteriaRdvs = criteriaComparisons.GroupBy(c => c.CriterionOne).Select(g =>
new
{
Criteria = g.Key,
Rdv = g.Sum(cc => GetWeightFactor(cc.Weight.Value)) / totalCritCompWeight
}).ToDictionary(d => d.Criteria, d => d.Rdv);
return(criteriaRdvs);
}
private void UpdateCriteriaComparisons()
{
var currentHashCodes = new HashSet <int>(CriteriaComparisons.Select(c => c.GetHashCode()));
var proposedHashCodes = new HashSet <int>();
for (int i = 0; i < Criteria.Items.Count(); i++)
{
for (int j = i + 1; j < Criteria.Items.Count(); j++)
{
var cc = new CriteriaComparison(Criteria.Items.ElementAt(i), Criteria.Items.ElementAt(j));
cc.OnWeightChange += OnWeightChange;
var hashCode = cc.GetHashCode();
proposedHashCodes.Add(hashCode);
if (!currentHashCodes.Contains(hashCode))
{
CriteriaComparisons.Add(cc);
}
}
}
foreach (var exitstingCc in CriteriaComparisons.ToList())
{
if (!proposedHashCodes.Contains(exitstingCc.GetHashCode()))
{
exitstingCc.OnWeightChange -= OnWeightChange;
CriteriaComparisons.Remove(exitstingCc);
}
}
CriteriaComparisons = CriteriaComparisons.OrderBy(c => c.CriterionOne).ToList();
}