public GenericDataModel GetItemBasedDataModel()
{
FastByIDMap <IPreferenceArray> data = new FastByIDMap <IPreferenceArray>();
IEnumerable <UserBookReview> allBookReviews = _userBookReviewRepository.GetListOf();
var everyReviewsBookId = allBookReviews.GroupBy(b => b.BookId).Select(x => x.Key).ToList();
foreach (int bookId in everyReviewsBookId)
{
List <UserBookReview> bookReviewsForABook = (from userReviews in allBookReviews
where userReviews.BookId == bookId
select userReviews).ToList();
List <IPreference> listOfPreferences = new List <IPreference>();
foreach (UserBookReview review in bookReviewsForABook)
{
int rating = review.Rating;
int reviewUserId = review.UserId;
GenericPreference pref = new GenericPreference(reviewUserId, bookId, rating); /// userId, itemid, valueId
listOfPreferences.Add(pref);
}
GenericItemPreferenceArray dataArray = new GenericItemPreferenceArray(listOfPreferences);
data.Put(bookId, dataArray);
}
return(new GenericDataModel(data));
}
public void testStrategy()
{
FastIDSet itemIDsFromUser123 = new FastIDSet();
itemIDsFromUser123.Add(1L);
FastIDSet itemIDsFromUser456 = new FastIDSet();
itemIDsFromUser456.Add(1L);
itemIDsFromUser456.Add(2L);
List <IPreference> prefs = new List <IPreference>();
prefs.Add(new GenericPreference(123L, 1L, 1.0f));
prefs.Add(new GenericPreference(456L, 1L, 1.0f));
IPreferenceArray preferencesForItem1 = new GenericItemPreferenceArray(prefs);
var dataModelMock = new DynamicMock(typeof(IDataModel));
dataModelMock.ExpectAndReturn("GetPreferencesForItem", preferencesForItem1, (1L));
dataModelMock.ExpectAndReturn("GetItemIDsFromUser", itemIDsFromUser123, (123L));
dataModelMock.ExpectAndReturn("GetItemIDsFromUser", itemIDsFromUser456, (456L));
IPreferenceArray prefArrayOfUser123 =
new GenericUserPreferenceArray(new List <IPreference>()
{
new GenericPreference(123L, 1L, 1.0f)
});
ICandidateItemsStrategy strategy = new PreferredItemsNeighborhoodCandidateItemsStrategy();
//EasyMock.replay(dataModel);
FastIDSet candidateItems = strategy.GetCandidateItems(123L, prefArrayOfUser123, (IDataModel)dataModelMock.MockInstance);
Assert.AreEqual(1, candidateItems.Count());
Assert.True(candidateItems.Contains(2L));
dataModelMock.Verify(); // EasyMock.verify(dataModel);
}
