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();
}
}
private void pruneInconsequentialDiffs()
{
// Go back and prune inconsequential diffs. "Inconsequential" means, here, only represented by one
// data point, so possibly unreliable
var it1 = averageDiffs.entrySet().ToList();
for (int i = 0; i < it1.Count; i++)
{
FastByIDMap <RunningAverage> map = it1[i].Value;
var it2 = map.entrySet().ToList();
for (int j = 0; j < it2.Count; j++)
{
RunningAverage average = it2[j].Value;
if (average.getCount() <= 1)
{
map.remove(it2[j].Key);
}
}
if (map.isEmpty())
{
averageDiffs.remove(it1[i].Key);
}
else
{
map.rehash();
}
}
averageDiffs.rehash();
}
private static void removeTimestamp(long userID, long itemID, FastByIDMap <FastByIDMap <DateTime?> > timestamps)
{
FastByIDMap <DateTime?> map = timestamps.get(userID);
if (map != null)
{
map.remove(itemID);
}
}
protected void processLine <T>(string line, FastByIDMap <T> data, FastByIDMap <FastByIDMap <DateTime?> > timestamps, bool fromPriorData)
{
bool flag2;
int num5;
PreferenceArray array2;
int num6;
float num7;
if ((line.Length == 0) || (line[0] == COMMENT_CHAR))
{
return;
}
string[] strArray = line.Split(new char[] { this.delimiter });
string str = strArray[0];
string str2 = strArray[1];
string str3 = strArray[2];
bool flag = strArray.Length > 3;
string timestampString = flag ? strArray[3] : null;
long key = this.readUserIDFromString(str);
long itemID = this.readItemIDFromString(str2);
if (this.transpose)
{
long num3 = key;
key = itemID;
itemID = num3;
}
T local = data.get(key);
if (!fromPriorData)
{
IEnumerable <Preference> source = (IEnumerable <Preference>)local;
if (flag || !string.IsNullOrWhiteSpace(str3))
{
num7 = float.Parse(str3, CultureInfo.InvariantCulture);
flag2 = false;
if (this.uniqueUserItemCheck && (source != null))
{
foreach (Preference preference in source)
{
if (preference.getItemID() == itemID)
{
flag2 = true;
preference.setValue(num7);
break;
}
}
}
if (!flag2)
{
if (source == null)
{
source = new List <Preference>(5);
data.put(key, (T)source);
}
if (source is IList <Preference> )
{
((IList <Preference>)source).Add(new GenericPreference(key, itemID, num7));
}
}
this.addTimestamp(key, itemID, timestampString, timestamps);
return;
}
if (source != null)
{
IEnumerator <Preference> enumerator = ((IEnumerable <Preference>)source.ToArray <Preference>()).GetEnumerator();
while (enumerator.MoveNext())
{
Preference current = enumerator.Current;
if (current.getItemID() == itemID)
{
if (source is IList <Preference> )
{
((IList <Preference>)local).Remove(current);
}
break;
}
}
}
removeTimestamp(key, itemID, timestamps);
return;
}
PreferenceArray array = (PreferenceArray)local;
if (flag || !string.IsNullOrWhiteSpace(str3))
{
num7 = float.Parse(str3, CultureInfo.InvariantCulture);
flag2 = false;
if (this.uniqueUserItemCheck && (array != null))
{
for (num5 = 0; num5 < array.length(); num5++)
{
if (array.getItemID(num5) == itemID)
{
flag2 = true;
array.setValue(num5, num7);
break;
}
}
}
}
else
{
if (array != null)
{
flag2 = false;
int num4 = array.length();
for (num5 = 0; num5 < num4; num5++)
{
if (array.getItemID(num5) == itemID)
{
flag2 = true;
break;
}
}
if (flag2)
{
if (num4 == 1)
{
data.remove(key);
}
else
{
array2 = new GenericUserPreferenceArray(num4 - 1);
num5 = 0;
for (num6 = 0; num5 < num4; num6++)
{
if (array.getItemID(num5) == itemID)
{
num6--;
}
else
{
array2.set(num6, array.get(num5));
}
num5++;
}
data.put(key, (T)array2);
}
}
}
removeTimestamp(key, itemID, timestamps);
goto Label_02F1;
}
if (!flag2)
{
if (array == null)
{
array = new GenericUserPreferenceArray(1);
}
else
{
array2 = new GenericUserPreferenceArray(array.length() + 1);
num5 = 0;
for (num6 = 1; num5 < array.length(); num6++)
{
array2.set(num6, array.get(num5));
num5++;
}
array = array2;
}
array.setUserID(0, key);
array.setItemID(0, itemID);
array.setValue(0, num7);
data.put(key, (T)array);
}
Label_02F1:
this.addTimestamp(key, itemID, timestampString, timestamps);
}
