//Extract new opinion words 70%
public List <OpinionWord> ExtractOpinionWords()
{
FillPositiveWords();
FillNegativeWords();
Lexicon();
PositionOfReview = 0;
lists.DoublePropagationList = new List <OpinionWord>();
foreach (var opinion in Opinions)
{
SentenceIndex = 0;
SentencesInReview = SentencesSeparator(SentencesInReview, PositionOfReview);
foreach (var sentence in SentencesInReview)
{
WordsInSentence = EachWordInSentence(WordsInSentence, SentencesInReview, SentenceIndex);
var i = -1;
foreach (var word in WordsInSentence)
{
i++;
var tempWord = word.ToLower();
var opinionWord = new OpinionWord(tempWord, WordOrientation)
{
OpWord = tempWord,
Orientation = WordOrientation
};
var position = i;
Target = GetOpinionWordTarget(tempWord, position, sentence);
if (lists.OpinionTargetList.Contains(Target))
{
tempWord = GetDoublePropagationOpinionWord(tempWord, position, sentence);
if ((dictionary.PositiveWords.Contains(tempWord) ||
dictionary.NegativeWords.Contains(tempWord)) &&
tempWord != null)
{
WordOrientation = GetOpinionWordOrientation(tempWord, position, sentence);
if (!lists.OpinionLexicon.Contains(tempWord))
{
lists.DoublePropagationList.Add(new OpinionWord(opinionWord.OpWord,
opinionWord.Orientation));
}
}
else
{
if (tempWord != null)
{
lists.DoublePropagationList.Add(new OpinionWord(tempWord, opinionWord.Orientation));
}
}
}
}
SentenceIndex++;
}
PositionOfReview++;
}
return(lists.DoublePropagationList);
}
//Filter seed extraction process 100%
public List <OpinionWord> ExtractFilteredSeedOpinionWords()
{
FillPositiveWords();
FillNegativeWords();
Lexicon();
PositionOfReview = 0;
lists.FilteredSeed = new List <OpinionWord>();
foreach (var opinion in Opinions)
{
SentenceIndex = 0;
SentencesInReview = SentencesSeparator(SentencesInReview, PositionOfReview);
foreach (var sentence in SentencesInReview)
{
WordsInSentence = EachWordInSentence(WordsInSentence, SentencesInReview, SentenceIndex);
var i = -1;
foreach (var word in WordsInSentence)
{
i++;
var tempWord = word.ToLower();
var opinionWord = new OpinionWord(tempWord, WordOrientation)
{
OpWord = tempWord,
Orientation = WordOrientation
};
if (dictionary.PositiveWords.Contains(tempWord) || dictionary.NegativeWords.Contains(tempWord))
{
var position = i;
WordOrientation = GetOpinionWordOrientation(tempWord, position, sentence);
if (!lists.OpinionLexicon.Contains(tempWord))
{
lists.FilteredSeed.Add(new OpinionWord(tempWord, WordOrientation)
{
OpWord = tempWord, Orientation = WordOrientation
});
}
else
{
lists.FilteredSeed.Add(opinionWord);
} //in documentation says that we have to add only oriantation..how to implement that?
}
}
SentenceIndex++;
Array.Clear(WordsInSentence, 0, WordsInSentence.Length);
}
PositionOfReview++;
}
return(lists.FilteredSeed);
}
//double check the opinion word orientations 80%
protected bool GetDoublePropagationOpWordOrientation(string OpionionTarget, int index, string sentence)
{
var tempOpinionWord = new OpinionWord(OpinionWord, WordOrientation);
if (sentence.Contains(OpinionWord))
{
WordOrientation = GetOpinionWordOrientation(OpinionWord, index, sentence);
}
else
{
SentenceIndex++;
SentencesSeparator(SentencesInReview, SentenceIndex);
sentence = SentencesInReview[SentenceIndex];
if (sentence.Contains(OpinionWord))
{
WordOrientation = GetOpinionWordOrientation(OpinionWord, index, sentence);
}
}
return(WordOrientation);
}
//Conjunction based extraction process 90%
public List <OpinionWord> ExtractConjunctionBasedOpinionWords()
{
FillPositiveWords();
FillNegativeWords();
PositionOfReview = 0;
SentenceIndex = 0;
lists.ConjunctionList = new List <OpinionWord>();
foreach (var Opinion in Opinions)
{
SentenceIndex = 0;
SentencesInReview = SentencesSeparator(SentencesInReview, PositionOfReview);
foreach (var sentence in SentencesInReview)
{
WordsInSentence = EachWordInSentence(WordsInSentence, SentencesInReview, SentenceIndex);
var i = -1;
foreach (var word in WordsInSentence)
{
i++;
var tempWord = word.ToLower();
var position = i;
var opinionWord = new OpinionWord(tempWord, WordOrientation)
{
OpWord = tempWord,
Orientation = WordOrientation
};
//check if the opinion word is included in filteredSeed list
var matches = lists.FilteredSeed.Find(Didaxto => opinionWord.OpWord == tempWord);
// var matches = FilteredSeed.Where(OpinionWord => OpinionWord.OpWord == tempWord);
if (lists.FilteredSeed.Contains(matches)) //matches.OfType<OpinionWord>().Equals(opinionWord)
{
if (position + 1 < WordsInSentence.Length)
{
if (dictionary.Conjunctions.Contains(WordsInSentence[position + 1]))
{
tempWord = GetConjunctionBaseOpinionWord(tempWord, position, sentence);
{
if (dictionary.PositiveWords.Contains(tempWord) ||
dictionary.NegativeWords.Contains(tempWord))
{
WordOrientation = GetOpinionWordOrientation(tempWord, position, sentence);
if (!lists.OpinionLexicon.Contains(tempWord))
{
lists.ConjunctionList.Add(new OpinionWord(tempWord, WordOrientation)
{
OpWord = tempWord, Orientation = WordOrientation
});
}
else
{
lists.ConjunctionList.Add(new OpinionWord(tempWord,
opinionWord.Orientation));
}
}
}
}
}
}
}
}
SentenceIndex++;
Array.Clear(WordsInSentence, 0, WordsInSentence.Length);
}
PositionOfReview++;
return(lists.ConjunctionList);
}
