public void testSetMultipleTempPreferences()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID1 = instance.TakeAvailableUser().Value;
long anonymousUserID2 = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs1 = new GenericUserPreferenceArray(1);
tempPrefs1.SetUserID(0, anonymousUserID1);
tempPrefs1.SetItemID(0, 1);
IPreferenceArray tempPrefs2 = new GenericUserPreferenceArray(2);
tempPrefs2.SetUserID(0, anonymousUserID2);
tempPrefs2.SetItemID(0, 2);
tempPrefs2.SetUserID(1, anonymousUserID2);
tempPrefs2.SetItemID(1, 3);
instance.SetTempPrefs(tempPrefs1, anonymousUserID1);
instance.SetTempPrefs(tempPrefs2, anonymousUserID2);
Assert.AreEqual(tempPrefs1, instance.GetPreferencesFromUser(anonymousUserID1));
Assert.AreEqual(tempPrefs2, instance.GetPreferencesFromUser(anonymousUserID2));
}
public void testGetUserIDs()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(1);
long sampleUserID = 1;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
FastByIDMap <IPreferenceArray> delegatePreferences = new FastByIDMap <IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, 22);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
var userIDs = instance.GetUserIDs();
userIDs.MoveNext();
Assert.AreEqual(sampleUserID, userIDs.Current);
Assert.False(userIDs.MoveNext());
}
public ActionResult Recommend(string filmIdsJson)
{
var filmIds = (new JavaScriptSerializer()).Deserialize<long[]>(filmIdsJson);
var pathToDataFile =
Path.Combine(System.Web.HttpRuntime.AppDomainAppPath, "data/albums.dat");
if (dataModel == null) {
try
{
dataModel = new FileDataModel(pathToDataFile, false, FileDataModel.DEFAULT_MIN_RELOAD_INTERVAL_MS, false);
}
catch (Exception e)
{
var exe = e.ToString();
}
}
var plusAnonymModel = new PlusAnonymousUserDataModel(dataModel);
var prefArr = new GenericUserPreferenceArray(filmIds.Length);
prefArr.SetUserID(0, PlusAnonymousUserDataModel.TEMP_USER_ID);
for (int i = 0; i < filmIds.Length; i++) {
prefArr.SetItemID(i, filmIds[i]);
prefArr.SetValue(i, 5); // lets assume max rating
}
plusAnonymModel.SetTempPrefs(prefArr);
var similarity = new LogLikelihoodSimilarity(plusAnonymModel);
var neighborhood = new NearestNUserNeighborhood(15, similarity, plusAnonymModel);
var recommender = new GenericBooleanPrefUserBasedRecommender(plusAnonymModel, neighborhood, similarity);
var recommendedItems = recommender.Recommend(PlusAnonymousUserDataModel.TEMP_USER_ID, 5, null);
return Json( recommendedItems.Select(ri => new Dictionary<string, object>() {
{"id", ri.GetItemID() },
{"rating", ri.GetValue() },
}).ToArray() );
}
public void testUserID()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(3);
Assert.AreEqual(3, prefs.Length());
prefs.SetUserID(0, 1L);
Assert.AreEqual(1L, prefs.GetUserID(0));
Assert.AreEqual(1L, prefs.GetUserID(1));
Assert.AreEqual(1L, prefs.GetUserID(2));
}
public void testGetPreferencesForItem()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(2);
long sampleUserID = 4;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
prefs.SetUserID(1, sampleUserID);
long sampleItemID2 = 22;
prefs.SetItemID(1, sampleItemID2);
FastByIDMap <IPreferenceArray> delegatePreferences = new FastByIDMap <IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(2);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetUserID(1, anonymousUserID);
long sampleItemID3 = 33;
tempPrefs.SetItemID(1, sampleItemID3);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(sampleUserID, instance.GetPreferencesForItem(sampleItemID).Get(0).GetUserID());
Assert.AreEqual(2, instance.GetPreferencesForItem(sampleItemID).Length());
Assert.AreEqual(1, instance.GetPreferencesForItem(sampleItemID2).Length());
Assert.AreEqual(1, instance.GetPreferencesForItem(sampleItemID3).Length());
Assert.AreEqual(2, instance.GetNumUsersWithPreferenceFor(sampleItemID));
Assert.AreEqual(1, instance.GetNumUsersWithPreferenceFor(sampleItemID, sampleItemID2));
Assert.AreEqual(1, instance.GetNumUsersWithPreferenceFor(sampleItemID, sampleItemID3));
}
public void testSetAndGetTempPreferences()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, 1);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(tempPrefs, instance.GetPreferencesFromUser(anonymousUserID));
instance.ReleaseUser(anonymousUserID);
}
public void testGetPreferencesForItem()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(2);
long sampleUserID = 4;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
prefs.SetUserID(1, sampleUserID);
long sampleItemID2 = 22;
prefs.SetItemID(1, sampleItemID2);
FastByIDMap<IPreferenceArray> delegatePreferences = new FastByIDMap<IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(2);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetUserID(1, anonymousUserID);
long sampleItemID3 = 33;
tempPrefs.SetItemID(1, sampleItemID3);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(sampleUserID, instance.GetPreferencesForItem(sampleItemID).Get(0).GetUserID());
Assert.AreEqual(2, instance.GetPreferencesForItem(sampleItemID).Length());
Assert.AreEqual(1, instance.GetPreferencesForItem(sampleItemID2).Length());
Assert.AreEqual(1, instance.GetPreferencesForItem(sampleItemID3).Length());
Assert.AreEqual(2, instance.GetNumUsersWithPreferenceFor(sampleItemID));
Assert.AreEqual(1, instance.GetNumUsersWithPreferenceFor(sampleItemID, sampleItemID2));
Assert.AreEqual(1, instance.GetNumUsersWithPreferenceFor(sampleItemID, sampleItemID3));
}
public void testGetNumUsersWithDelegateUsersOnly()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(1);
long sampleUserID = 1;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
FastByIDMap<IPreferenceArray> delegatePreferences = new FastByIDMap<IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
Assert.AreEqual(1, instance.GetNumUsers());
}
public void testGetNumAnonymousUsers()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID1 = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs1 = new GenericUserPreferenceArray(1);
tempPrefs1.SetUserID(0, anonymousUserID1);
tempPrefs1.SetItemID(0, 1);
instance.SetTempPrefs(tempPrefs1, anonymousUserID1);
// Anonymous users should not be included into the universe.
Assert.AreEqual(0, instance.GetNumUsers());
}
public void testGetNumAnonymousUsers()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID1 = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs1 = new GenericUserPreferenceArray(1);
tempPrefs1.SetUserID(0, anonymousUserID1);
tempPrefs1.SetItemID(0, 1);
instance.SetTempPrefs(tempPrefs1, anonymousUserID1);
// Anonymous users should not be included into the universe.
Assert.AreEqual(0, instance.GetNumUsers());
}
public void testGetPreferencesForNonAnonymousUser()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(1);
long sampleUserID = 1;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
FastByIDMap <IPreferenceArray> delegatePreferences = new FastByIDMap <IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
Assert.AreEqual(prefs, instance.GetPreferencesFromUser(sampleUserID));
}
public void testGetPreferenceValue()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
long sampleItemID = 1;
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetValue(0, float.MaxValue);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(float.MaxValue, instance.GetPreferenceValue(anonymousUserID, sampleItemID), EPSILON);
}
public void testSetMultipleTempPreferences()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID1 = instance.TakeAvailableUser().Value;
long anonymousUserID2 = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs1 = new GenericUserPreferenceArray(1);
tempPrefs1.SetUserID(0, anonymousUserID1);
tempPrefs1.SetItemID(0, 1);
IPreferenceArray tempPrefs2 = new GenericUserPreferenceArray(2);
tempPrefs2.SetUserID(0, anonymousUserID2);
tempPrefs2.SetItemID(0, 2);
tempPrefs2.SetUserID(1, anonymousUserID2);
tempPrefs2.SetItemID(1, 3);
instance.SetTempPrefs(tempPrefs1, anonymousUserID1);
instance.SetTempPrefs(tempPrefs2, anonymousUserID2);
Assert.AreEqual(tempPrefs1, instance.GetPreferencesFromUser(anonymousUserID1));
Assert.AreEqual(tempPrefs2, instance.GetPreferencesFromUser(anonymousUserID2));
}
public void testSetAndGetTempPreferences()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, 1);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(tempPrefs, instance.GetPreferencesFromUser(anonymousUserID));
instance.ReleaseUser(anonymousUserID);
}
public void testGetUserIDs()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(1);
long sampleUserID = 1;
prefs.SetUserID(0, sampleUserID);
long sampleItemID = 11;
prefs.SetItemID(0, sampleItemID);
FastByIDMap<IPreferenceArray> delegatePreferences = new FastByIDMap<IPreferenceArray>();
delegatePreferences.Put(sampleUserID, prefs);
PlusAnonymousConcurrentUserDataModel instance = getTestableWithDelegateData(10, delegatePreferences);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
tempPrefs.SetItemID(0, 22);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
var userIDs = instance.GetUserIDs();
userIDs.MoveNext();
Assert.AreEqual(sampleUserID, userIDs.Current);
Assert.False(userIDs.MoveNext());
}
public void testUserID()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(3);
Assert.AreEqual(3, prefs.Length());
prefs.SetUserID(0, 1L);
Assert.AreEqual(1L, prefs.GetUserID(0));
Assert.AreEqual(1L, prefs.GetUserID(1));
Assert.AreEqual(1L, prefs.GetUserID(2));
}
public void testGetPreferenceValue()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
long sampleItemID = 1;
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetValue(0, float.MaxValue);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(float.MaxValue, instance.GetPreferenceValue(anonymousUserID, sampleItemID), EPSILON);
}
