public void removeItemPref(long userID, long itemIDA, float prefValue)
{
PreferenceArray userPreferences = dataModel.getPreferencesFromUser(userID);
try
{
buildAverageDiffsLock.EnterWriteLock();
FastByIDMap <RunningAverage> aMap = averageDiffs.get(itemIDA);
int length = userPreferences.length();
for (int i = 0; i < length; i++)
{
long itemIDB = userPreferences.getItemID(i);
float bValue = userPreferences.getValue(i);
if (itemIDA < itemIDB)
{
if (aMap != null)
{
RunningAverage average = aMap.get(itemIDB);
if (average != null)
{
if (average.getCount() <= 1)
{
aMap.remove(itemIDB);
}
else
{
average.removeDatum(bValue - prefValue);
}
}
}
}
else if (itemIDA > itemIDB)
{
FastByIDMap <RunningAverage> bMap = averageDiffs.get(itemIDB);
if (bMap != null)
{
RunningAverage average = bMap.get(itemIDA);
if (average != null)
{
if (average.getCount() <= 1)
{
aMap.remove(itemIDA);
}
else
{
average.removeDatum(prefValue - bValue);
}
}
}
}
}
}
finally
{
buildAverageDiffsLock.ExitWriteLock();
}
}
public override void removePreference(long userID, long itemID)
{
float?nullable = this.getDataModel().getPreferenceValue(userID, itemID);
base.removePreference(userID, itemID);
if (nullable.HasValue)
{
lock (this)
{
RunningAverage average = this.itemAverages.get(itemID);
if (average == null)
{
throw new InvalidOperationException("No preferences exist for item ID: " + itemID);
}
average.removeDatum((double)nullable.Value);
RunningAverage average2 = this.userAverages.get(userID);
if (average2 == null)
{
throw new InvalidOperationException("No preferences exist for user ID: " + userID);
}
average2.removeDatum((double)nullable.Value);
this.overallAveragePrefValue.removeDatum((double)nullable.Value);
}
}
}