/// <summary>
/// Updates the ngram usage count based on the sentiment and whether or not
/// the partialTweetText is a rewteet.
/// </summary>
/// <param name="ngram">The ngram.</param>
/// <param name="isRetweet">
/// if set to <c>true</c> [is retweet].
/// </param>
/// <param name="sentiment">The sentiment.</param>
public static void UpdateNgramUsageCount(NgramBase ngram, bool isRetweet, Sentiment sentiment)
{
if (isRetweet)
{
if (sentiment.Equals(Sentiment.Positive))
{
ngram.RtPositiveCount++;
}
else if (sentiment.Equals(Sentiment.Negative))
{
ngram.RtNegativeCount++;
}
else
{
ngram.RtNeutralCount++;
}
}
else
{
if (sentiment.Equals(Sentiment.Positive))
{
ngram.PositiveCount++;
}
else if (sentiment.Equals(Sentiment.Negative))
{
ngram.NegativeCount++;
}
else
{
ngram.NeutralCount++;
}
}
}
/// <summary>
/// Updates the ngrams sentiment count based on the sentiment of the partialTweetText and whether
/// or not this ngram is part of the retweet.
/// </summary>
/// <param name="ngrams">The ngrams.</param>
/// <param name="isRetweet">
/// if set to <c>true</c> [is retweet].
/// </param>
/// <param name="sentiment">The sentiment.</param>
/// <param name="ngramDbSet">The ngram db set.</param>
/// <param name="isStemmed">
/// if set to <c>true</c> [is stemmed].
/// </param>
/// <param name="context">The context.</param>
public static void UpdateNgramsSentiment <TEntity>(IList <String> ngrams, bool isRetweet, Sentiment sentiment,
bool isStemmed, DbSet <TEntity> ngramDbSet,
IOclumenContext context) where TEntity : NgramBase
{
foreach (String currentNgram in ngrams)
{
NgramBase dbNgram = ngramDbSet.FirstOrDefault(x => x.Text == currentNgram);
if (dbNgram == null)
{
// ok we dont have this ngram in our database yet
NgramBase newNgram;
if (isStemmed)
{
newNgram = new StemmedNgram
{
Text = currentNgram,
Cardinality = GetNgramCardinality(currentNgram)
};
}
else
{
newNgram = new BasicNgram {
Text = currentNgram, Cardinality = GetNgramCardinality(currentNgram)
};
}
ngramDbSet.Add((TEntity)newNgram);
dbNgram = newNgram;
context.SaveChanges();
}
// update the usage count
UpdateNgramUsageCount(dbNgram, isRetweet, sentiment);
}
}
