protected virtual float doEstimatePreference(long userID, PreferenceArray preferencesFromUser, long itemID)
{
double num = 0.0;
double num2 = 0.0;
int num3 = 0;
double[] numArray = this.similarity.itemSimilarities(itemID, preferencesFromUser.getIDs());
for (int i = 0; i < numArray.Length; i++)
{
double d = numArray[i];
if (!double.IsNaN(d))
{
num += d * preferencesFromUser.getValue(i);
num2 += d;
num3++;
}
}
if (num3 <= 1)
{
return(float.NaN);
}
float estimate = (float)(num / num2);
if (this.capper != null)
{
estimate = this.capper.capEstimate(estimate);
}
return(estimate);
}
protected override float doEstimatePreference(long userID, PreferenceArray preferencesFromUser, long itemID)
{
double[] numArray = base.getSimilarity().itemSimilarities(itemID, preferencesFromUser.getIDs());
bool flag = false;
double num = 0.0;
foreach (double num2 in numArray)
{
if (!double.IsNaN(num2))
{
flag = true;
num += num2;
}
}
return(flag ? ((float)num) : float.NaN);
}
public FastIDSet getCandidateItems(long userID, PreferenceArray preferencesFromUser, DataModel dataModel)
{
return(this.doGetCandidateItems(preferencesFromUser.getIDs(), dataModel));
}